/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_o100.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:35:28,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:35:28,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:35:28,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:35:28,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:35:28,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:35:28,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:35:28,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:35:28,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:35:28,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:35:28,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:35:28,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:35:28,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:35:28,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:35:28,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:35:28,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:35:28,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:35:28,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:35:28,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:35:28,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:35:28,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:35:28,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:35:28,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:35:28,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:35:28,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:35:28,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:35:28,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:35:28,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:35:28,664 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 [2020-08-22 16:35:28,722 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:35:28,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:35:28,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:35:28,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:35:28,729 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:35:28,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:35:28,730 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:35:28,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:35:28,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:35:28,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:35:28,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:35:28,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:35:28,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:35:28,731 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:35:28,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:35:28,732 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:35:28,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:35:28,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:35:28,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:35:28,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:35:28,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:35:28,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:35:28,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:35:28,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:35:28,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:35:28,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:35:28,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:35:28,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:35:28,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:35:28,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:35:29,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:35:29,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:35:29,070 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:35:29,071 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:35:29,072 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:35:29,072 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o100.c [2020-08-22 16:35:29,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/523809305/5781b0b9810546629c14b575b85bb43f/FLAGa0e54a785 [2020-08-22 16:35:29,671 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:35:29,672 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o100.c [2020-08-22 16:35:29,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/523809305/5781b0b9810546629c14b575b85bb43f/FLAGa0e54a785 [2020-08-22 16:35:30,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/523809305/5781b0b9810546629c14b575b85bb43f [2020-08-22 16:35:30,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:35:30,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:35:30,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:35:30,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:35:30,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:35:30,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:35:30" (1/1) ... [2020-08-22 16:35:30,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18bf44d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:30, skipping insertion in model container [2020-08-22 16:35:30,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:35:30" (1/1) ... [2020-08-22 16:35:30,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:35:30,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:35:30,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:35:30,322 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:35:30,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:35:30,356 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:35:30,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:30 WrapperNode [2020-08-22 16:35:30,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:35:30,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:35:30,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:35:30,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:35:30,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:30" (1/1) ... [2020-08-22 16:35:30,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:30" (1/1) ... [2020-08-22 16:35:30,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:30" (1/1) ... [2020-08-22 16:35:30,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:30" (1/1) ... [2020-08-22 16:35:30,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:30" (1/1) ... [2020-08-22 16:35:30,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:30" (1/1) ... [2020-08-22 16:35:30,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:30" (1/1) ... [2020-08-22 16:35:30,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:35:30,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:35:30,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:35:30,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:35:30,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:35:30,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:35:30,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:35:30,570 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 16:35:30,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:35:30,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 16:35:30,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:35:30,571 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 16:35:30,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:35:30,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:35:30,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:35:30,746 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:35:30,747 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:35:30,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:35:30 BoogieIcfgContainer [2020-08-22 16:35:30,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:35:30,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:35:30,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:35:30,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:35:30,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:35:30" (1/3) ... [2020-08-22 16:35:30,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c52cf1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:35:30, skipping insertion in model container [2020-08-22 16:35:30,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:30" (2/3) ... [2020-08-22 16:35:30,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c52cf1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:35:30, skipping insertion in model container [2020-08-22 16:35:30,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:35:30" (3/3) ... [2020-08-22 16:35:30,765 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o100.c [2020-08-22 16:35:30,776 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:35:30,784 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:35:30,798 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:35:30,825 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:35:30,825 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:35:30,826 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:35:30,826 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:35:30,826 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:35:30,826 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:35:30,827 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:35:30,827 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:35:30,845 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 16:35:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:35:30,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:30,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:30,855 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:30,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:30,862 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 16:35:30,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:30,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311183030] [2020-08-22 16:35:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:31,188 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-08-22 16:35:31,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:31,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:35:31,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311183030] [2020-08-22 16:35:31,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:35:31,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:35:31,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122550106] [2020-08-22 16:35:31,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:35:31,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:31,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:35:31,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:35:31,322 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 16:35:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:31,384 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-22 16:35:31,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:35:31,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 16:35:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:31,399 INFO L225 Difference]: With dead ends: 32 [2020-08-22 16:35:31,399 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 16:35:31,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:35:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 16:35:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 16:35:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 16:35:31,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 16:35:31,455 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 16:35:31,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:31,456 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 16:35:31,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:35:31,457 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 16:35:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:35:31,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:31,459 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:31,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:35:31,460 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:31,461 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 16:35:31,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:31,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262450467] [2020-08-22 16:35:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:31,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:31,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:31,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:35:31,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262450467] [2020-08-22 16:35:31,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945582894] [2020-08-22 16:35:31,671 INFO L95 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 [2020-08-22 16:35:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-08-22 16:35:31,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:35:31,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:31,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-08-22 16:35:31,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581326203] [2020-08-22 16:35:31,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:35:31,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:31,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:35:31,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:35:31,832 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-08-22 16:35:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:31,887 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 16:35:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:35:31,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-08-22 16:35:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:31,889 INFO L225 Difference]: With dead ends: 25 [2020-08-22 16:35:31,889 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:35:31,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:35:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:35:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 16:35:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 16:35:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 16:35:31,897 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 16:35:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:31,898 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 16:35:31,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:35:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 16:35:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:35:31,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:31,900 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:32,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:35:32,110 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:32,111 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 16:35:32,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:32,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243453956] [2020-08-22 16:35:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:32,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:32,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:32,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:32,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:35:32,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243453956] [2020-08-22 16:35:32,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270381515] [2020-08-22 16:35:32,403 INFO L93 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 [2020-08-22 16:35:32,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:32,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2020-08-22 16:35:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:35:32,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:32,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-08-22 16:35:32,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108927065] [2020-08-22 16:35:32,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:35:32,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:35:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:35:32,528 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-08-22 16:35:32,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:32,577 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 16:35:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:35:32,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-08-22 16:35:32,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:32,579 INFO L225 Difference]: With dead ends: 28 [2020-08-22 16:35:32,579 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 16:35:32,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:35:32,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 16:35:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 16:35:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 16:35:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 16:35:32,587 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 16:35:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:32,587 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 16:35:32,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:35:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 16:35:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:35:32,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:32,589 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:32,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:32,803 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:32,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 16:35:32,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:32,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753626984] [2020-08-22 16:35:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:32,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:32,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:32,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:32,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:33,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:35:33,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753626984] [2020-08-22 16:35:33,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277752572] [2020-08-22 16:35:33,030 INFO L93 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 [2020-08-22 16:35:33,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-08-22 16:35:33,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:33,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-08-22 16:35:33,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:35:33,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:33,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-08-22 16:35:33,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505778314] [2020-08-22 16:35:33,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:35:33,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:33,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:35:33,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:35:33,126 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2020-08-22 16:35:33,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:33,184 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 16:35:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:35:33,185 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-08-22 16:35:33,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:33,186 INFO L225 Difference]: With dead ends: 31 [2020-08-22 16:35:33,187 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 16:35:33,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:35:33,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 16:35:33,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 16:35:33,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 16:35:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 16:35:33,194 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 16:35:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:33,194 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 16:35:33,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:35:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 16:35:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 16:35:33,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:33,196 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:33,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:33,412 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:33,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:33,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 16:35:33,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:33,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892085441] [2020-08-22 16:35:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:33,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:33,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:33,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:33,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:33,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:33,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 16:35:33,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892085441] [2020-08-22 16:35:33,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570285204] [2020-08-22 16:35:33,684 INFO L93 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:33,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:35:33,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:33,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2020-08-22 16:35:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 16:35:33,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:33,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-08-22 16:35:33,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803659318] [2020-08-22 16:35:33,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:35:33,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:33,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:35:33,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:35:33,818 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2020-08-22 16:35:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:33,904 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 16:35:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:35:33,905 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-08-22 16:35:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:33,907 INFO L225 Difference]: With dead ends: 34 [2020-08-22 16:35:33,907 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 16:35:33,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:35:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 16:35:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 16:35:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:35:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 16:35:33,922 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 16:35:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:33,922 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 16:35:33,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:35:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 16:35:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 16:35:33,926 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:33,926 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:34,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:34,141 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:34,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:34,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 16:35:34,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:34,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516482557] [2020-08-22 16:35:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:34,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:34,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:34,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:34,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:34,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:34,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 16:35:34,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516482557] [2020-08-22 16:35:34,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981487986] [2020-08-22 16:35:34,453 INFO L93 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 [2020-08-22 16:35:34,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-08-22 16:35:34,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:34,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2020-08-22 16:35:34,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 16:35:34,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:34,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-08-22 16:35:34,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685953940] [2020-08-22 16:35:34,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:35:34,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:34,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:35:34,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:35:34,691 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 16 states. [2020-08-22 16:35:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:34,784 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 16:35:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:35:34,784 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-08-22 16:35:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:34,786 INFO L225 Difference]: With dead ends: 37 [2020-08-22 16:35:34,786 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 16:35:34,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:35:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 16:35:34,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 16:35:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:35:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 16:35:34,793 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 16:35:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:34,793 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 16:35:34,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:35:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 16:35:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 16:35:34,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:34,795 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:35,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:35:35,009 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:35,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:35,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 16:35:35,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:35,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102493226] [2020-08-22 16:35:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:35,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:35,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:35,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:35,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:35,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:35,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:35,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:35,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 16:35:35,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102493226] [2020-08-22 16:35:35,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217758876] [2020-08-22 16:35:35,417 INFO L93 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 [2020-08-22 16:35:35,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-08-22 16:35:35,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:35,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2020-08-22 16:35:35,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 16:35:35,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:35,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-08-22 16:35:35,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744583991] [2020-08-22 16:35:35,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 16:35:35,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:35,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 16:35:35,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:35:35,563 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 18 states. [2020-08-22 16:35:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:35,681 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 16:35:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 16:35:35,682 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-08-22 16:35:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:35,684 INFO L225 Difference]: With dead ends: 40 [2020-08-22 16:35:35,684 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 16:35:35,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:35:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 16:35:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 16:35:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 16:35:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 16:35:35,691 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 16:35:35,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:35,692 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 16:35:35,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 16:35:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 16:35:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 16:35:35,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:35,693 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:35,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:35,909 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:35,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 16:35:35,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:35,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11333136] [2020-08-22 16:35:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:35,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:35,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 16:35:36,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11333136] [2020-08-22 16:35:36,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645480881] [2020-08-22 16:35:36,346 INFO L93 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 [2020-08-22 16:35:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2020-08-22 16:35:36,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 16:35:36,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:36,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-08-22 16:35:36,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462812857] [2020-08-22 16:35:36,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:35:36,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:36,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:35:36,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:35:36,485 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 20 states. [2020-08-22 16:35:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:36,637 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 16:35:36,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:35:36,638 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-08-22 16:35:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:36,639 INFO L225 Difference]: With dead ends: 43 [2020-08-22 16:35:36,639 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 16:35:36,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:35:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 16:35:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 16:35:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 16:35:36,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 16:35:36,647 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 16:35:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:36,648 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 16:35:36,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:35:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 16:35:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 16:35:36,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:36,650 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:36,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:36,865 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:36,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 16:35:36,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:36,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86584527] [2020-08-22 16:35:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:36,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:37,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:37,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:37,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:37,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:37,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:37,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:37,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 16:35:37,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86584527] [2020-08-22 16:35:37,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745959011] [2020-08-22 16:35:37,368 INFO L93 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 [2020-08-22 16:35:37,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:37,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 39 conjunts are in the unsatisfiable core [2020-08-22 16:35:37,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 16:35:37,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:37,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-08-22 16:35:37,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105691457] [2020-08-22 16:35:37,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 16:35:37,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:37,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 16:35:37,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:35:37,501 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2020-08-22 16:35:37,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:37,664 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 16:35:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 16:35:37,665 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-08-22 16:35:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:37,666 INFO L225 Difference]: With dead ends: 46 [2020-08-22 16:35:37,666 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 16:35:37,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:35:37,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 16:35:37,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 16:35:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 16:35:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 16:35:37,673 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 16:35:37,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:37,673 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 16:35:37,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 16:35:37,674 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 16:35:37,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 16:35:37,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:37,675 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:37,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-08-22 16:35:37,889 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 16:35:37,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:37,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143486472] [2020-08-22 16:35:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:37,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:37,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:37,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 16:35:38,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143486472] [2020-08-22 16:35:38,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162121956] [2020-08-22 16:35:38,442 INFO L93 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 [2020-08-22 16:35:38,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-08-22 16:35:38,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2020-08-22 16:35:38,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 16:35:38,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:38,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-08-22 16:35:38,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252720656] [2020-08-22 16:35:38,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 16:35:38,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:38,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 16:35:38,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:35:38,708 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-08-22 16:35:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:38,928 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 16:35:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 16:35:38,929 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-08-22 16:35:38,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:38,934 INFO L225 Difference]: With dead ends: 49 [2020-08-22 16:35:38,934 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 16:35:38,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:35:38,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 16:35:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 16:35:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 16:35:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 16:35:38,946 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 16:35:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:38,948 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 16:35:38,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 16:35:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 16:35:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 16:35:38,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:38,953 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:39,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:39,162 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:39,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 16:35:39,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:39,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734720846] [2020-08-22 16:35:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 16:35:39,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734720846] [2020-08-22 16:35:39,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045066589] [2020-08-22 16:35:39,898 INFO L93 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 [2020-08-22 16:35:39,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:35:39,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:39,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2020-08-22 16:35:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 16:35:40,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:40,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-08-22 16:35:40,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523303976] [2020-08-22 16:35:40,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 16:35:40,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:40,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 16:35:40,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:35:40,050 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 26 states. [2020-08-22 16:35:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:40,329 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 16:35:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 16:35:40,330 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-08-22 16:35:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:40,331 INFO L225 Difference]: With dead ends: 52 [2020-08-22 16:35:40,331 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 16:35:40,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:35:40,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 16:35:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 16:35:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 16:35:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 16:35:40,346 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 16:35:40,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:40,346 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 16:35:40,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 16:35:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 16:35:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 16:35:40,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:40,348 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:40,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:40,550 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:40,551 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-22 16:35:40,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:40,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353639842] [2020-08-22 16:35:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 16:35:41,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353639842] [2020-08-22 16:35:41,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813166665] [2020-08-22 16:35:41,533 INFO L93 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 [2020-08-22 16:35:57,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-08-22 16:35:57,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:57,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 51 conjunts are in the unsatisfiable core [2020-08-22 16:35:57,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 16:35:57,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:57,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-08-22 16:35:57,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526185851] [2020-08-22 16:35:57,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 16:35:57,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:57,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 16:35:57,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:35:57,585 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 28 states. [2020-08-22 16:35:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:57,857 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 16:35:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 16:35:57,857 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-22 16:35:57,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:57,859 INFO L225 Difference]: With dead ends: 55 [2020-08-22 16:35:57,859 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 16:35:57,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:35:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 16:35:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 16:35:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 16:35:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 16:35:57,874 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 16:35:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:57,875 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 16:35:57,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 16:35:57,875 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 16:35:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 16:35:57,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:57,876 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:58,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-08-22 16:35:58,084 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:58,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-22 16:35:58,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:58,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282111661] [2020-08-22 16:35:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 16:35:58,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282111661] [2020-08-22 16:35:58,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165510338] [2020-08-22 16:35:58,958 INFO L93 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 [2020-08-22 16:35:59,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-08-22 16:35:59,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:59,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 55 conjunts are in the unsatisfiable core [2020-08-22 16:35:59,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 16:35:59,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:59,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-08-22 16:35:59,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638314056] [2020-08-22 16:35:59,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 16:35:59,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:59,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 16:35:59,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:35:59,334 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 30 states. [2020-08-22 16:35:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:59,663 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 16:35:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 16:35:59,663 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-08-22 16:35:59,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:59,665 INFO L225 Difference]: With dead ends: 58 [2020-08-22 16:35:59,665 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 16:35:59,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:35:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 16:35:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 16:35:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 16:35:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 16:35:59,672 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 16:35:59,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:59,672 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 16:35:59,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 16:35:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 16:35:59,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 16:35:59,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:59,673 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:59,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-08-22 16:35:59,877 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-22 16:35:59,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:59,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004297423] [2020-08-22 16:35:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:59,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:59,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:59,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 16:36:00,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004297423] [2020-08-22 16:36:00,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70917395] [2020-08-22 16:36:00,948 INFO L93 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 [2020-08-22 16:36:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:00,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 59 conjunts are in the unsatisfiable core [2020-08-22 16:36:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 16:36:01,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:01,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-08-22 16:36:01,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257426591] [2020-08-22 16:36:01,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 16:36:01,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:01,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 16:36:01,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:36:01,099 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 32 states. [2020-08-22 16:36:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:01,510 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 16:36:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 16:36:01,511 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2020-08-22 16:36:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:01,512 INFO L225 Difference]: With dead ends: 61 [2020-08-22 16:36:01,512 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 16:36:01,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:36:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 16:36:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 16:36:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 16:36:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 16:36:01,520 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 16:36:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:01,520 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 16:36:01,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 16:36:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 16:36:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 16:36:01,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:01,521 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:01,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-08-22 16:36:01,726 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-22 16:36:01,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:01,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540206530] [2020-08-22 16:36:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:01,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:01,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:01,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:01,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:01,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 16:36:02,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540206530] [2020-08-22 16:36:02,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566577334] [2020-08-22 16:36:02,913 INFO L93 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 [2020-08-22 16:36:02,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:36:02,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:02,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 63 conjunts are in the unsatisfiable core [2020-08-22 16:36:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 16:36:03,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:03,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-08-22 16:36:03,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839780052] [2020-08-22 16:36:03,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 16:36:03,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:03,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 16:36:03,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:36:03,083 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 34 states. [2020-08-22 16:36:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:03,517 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 16:36:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 16:36:03,517 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2020-08-22 16:36:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:03,518 INFO L225 Difference]: With dead ends: 64 [2020-08-22 16:36:03,518 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 16:36:03,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:36:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 16:36:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 16:36:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 16:36:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 16:36:03,524 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 16:36:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:03,525 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 16:36:03,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 16:36:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 16:36:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 16:36:03,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:03,526 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:03,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:03,739 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-22 16:36:03,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:03,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591126400] [2020-08-22 16:36:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:03,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:03,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:03,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:03,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:03,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 16:36:04,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591126400] [2020-08-22 16:36:04,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350462676] [2020-08-22 16:36:04,848 INFO L93 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 [2020-08-22 16:36:05,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-08-22 16:36:05,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:05,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 68 conjunts are in the unsatisfiable core [2020-08-22 16:36:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 16:36:05,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:05,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-08-22 16:36:05,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072895802] [2020-08-22 16:36:05,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 16:36:05,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 16:36:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 16:36:05,497 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 36 states. [2020-08-22 16:36:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:06,034 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-22 16:36:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 16:36:06,036 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2020-08-22 16:36:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:06,038 INFO L225 Difference]: With dead ends: 67 [2020-08-22 16:36:06,038 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 16:36:06,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 16:36:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 16:36:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 16:36:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 16:36:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 16:36:06,043 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-22 16:36:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:06,044 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 16:36:06,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 16:36:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 16:36:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 16:36:06,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:06,045 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:06,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-08-22 16:36:06,249 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:06,250 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-22 16:36:06,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:06,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370096930] [2020-08-22 16:36:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 16:36:07,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370096930] [2020-08-22 16:36:07,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004521319] [2020-08-22 16:36:07,569 INFO L93 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 [2020-08-22 16:36:07,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:36:07,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:07,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 71 conjunts are in the unsatisfiable core [2020-08-22 16:36:07,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 16:36:07,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:07,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-08-22 16:36:07,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200629858] [2020-08-22 16:36:07,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 16:36:07,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:07,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 16:36:07,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 16:36:07,777 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 38 states. [2020-08-22 16:36:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:08,378 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-22 16:36:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 16:36:08,383 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2020-08-22 16:36:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:08,384 INFO L225 Difference]: With dead ends: 70 [2020-08-22 16:36:08,385 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 16:36:08,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 16:36:08,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 16:36:08,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-22 16:36:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 16:36:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-22 16:36:08,391 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-22 16:36:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:08,392 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-22 16:36:08,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 16:36:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-22 16:36:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 16:36:08,393 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:08,393 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:08,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-08-22 16:36:08,606 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:08,607 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-22 16:36:08,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:08,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408510558] [2020-08-22 16:36:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-22 16:36:10,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408510558] [2020-08-22 16:36:10,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407236234] [2020-08-22 16:36:10,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true