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/array-examples/standard_copy8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:44:32,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:44:32,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:44:32,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 09:44:32,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 09:44:32,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 09:44:32,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 09:44:32,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 09:44:32,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 09:44:32,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 09:44:32,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 09:44:32,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 09:44:32,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:44:32,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:44:32,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:44:32,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:44:32,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:44:32,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:44:32,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:44:32,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:44:32,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:44:32,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:44:32,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:44:32,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:44:32,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:44:32,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 09:44:32,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 09:44:32,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 09:44:32,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 09:44:32,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 09:44:32,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 09:44:32,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 09:44:32,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 09:44:32,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:44:32,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:44:32,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:44:32,632 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 [2019-09-07 09:44:32,646 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:44:32,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:44:32,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:44:32,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:44:32,648 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:44:32,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:44:32,649 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:44:32,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:44:32,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:44:32,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:44:32,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:44:32,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:44:32,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:44:32,650 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:44:32,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:44:32,650 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:44:32,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:44:32,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:44:32,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:44:32,651 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:44:32,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:44:32,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:44:32,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:44:32,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:44:32,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:44:32,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:44:32,654 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:44:32,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:44:32,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:44:32,690 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:44:32,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:44:32,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:44:32,707 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:44:32,707 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:44:32,708 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-09-07 09:44:32,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a22e0ec2/ec1779d2f26546d88d1271cf5c02f01d/FLAG7d3776740 [2019-09-07 09:44:33,288 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:44:33,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-09-07 09:44:33,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a22e0ec2/ec1779d2f26546d88d1271cf5c02f01d/FLAG7d3776740 [2019-09-07 09:44:33,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a22e0ec2/ec1779d2f26546d88d1271cf5c02f01d [2019-09-07 09:44:33,616 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:44:33,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:44:33,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:44:33,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:44:33,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:44:33,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:44:33" (1/1) ... [2019-09-07 09:44:33,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4b40c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:33, skipping insertion in model container [2019-09-07 09:44:33,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:44:33" (1/1) ... [2019-09-07 09:44:33,635 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:44:33,655 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:44:33,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:44:33,920 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:44:33,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:44:34,068 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:44:34,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:34 WrapperNode [2019-09-07 09:44:34,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:44:34,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:44:34,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:44:34,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:44:34,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:34" (1/1) ... [2019-09-07 09:44:34,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:34" (1/1) ... [2019-09-07 09:44:34,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:34" (1/1) ... [2019-09-07 09:44:34,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:34" (1/1) ... [2019-09-07 09:44:34,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:34" (1/1) ... [2019-09-07 09:44:34,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:34" (1/1) ... [2019-09-07 09:44:34,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:34" (1/1) ... [2019-09-07 09:44:34,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:44:34,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:44:34,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:44:34,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:44:34,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:34" (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 [2019-09-07 09:44:34,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:44:34,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:44:34,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:44:34,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:44:34,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:44:34,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:44:34,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:44:34,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:44:34,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:44:34,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:44:34,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:44:34,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:44:34,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:44:34,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:44:34,617 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:44:34,618 INFO L283 CfgBuilder]: Removed 10 assume(true) statements. [2019-09-07 09:44:34,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:44:34 BoogieIcfgContainer [2019-09-07 09:44:34,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:44:34,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:44:34,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:44:34,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:44:34,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:44:33" (1/3) ... [2019-09-07 09:44:34,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce4d2dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:44:34, skipping insertion in model container [2019-09-07 09:44:34,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:34" (2/3) ... [2019-09-07 09:44:34,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce4d2dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:44:34, skipping insertion in model container [2019-09-07 09:44:34,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:44:34" (3/3) ... [2019-09-07 09:44:34,646 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.i [2019-09-07 09:44:34,665 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:44:34,674 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:44:34,691 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:44:34,724 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:44:34,724 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:44:34,724 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:44:34,725 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:44:34,725 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:44:34,725 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:44:34,725 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:44:34,725 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:44:34,725 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:44:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2019-09-07 09:44:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-07 09:44:34,750 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:34,751 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:34,753 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:34,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:34,758 INFO L82 PathProgramCache]: Analyzing trace with hash 661673386, now seen corresponding path program 1 times [2019-09-07 09:44:34,760 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:34,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:34,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:34,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:34,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:44:34,953 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:44:34,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:44:34,958 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:44:34,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:44:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:44:34,972 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 2 states. [2019-09-07 09:44:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:35,002 INFO L93 Difference]: Finished difference Result 88 states and 127 transitions. [2019-09-07 09:44:35,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:44:35,003 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2019-09-07 09:44:35,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:35,012 INFO L225 Difference]: With dead ends: 88 [2019-09-07 09:44:35,012 INFO L226 Difference]: Without dead ends: 43 [2019-09-07 09:44:35,016 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:44:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-07 09:44:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-07 09:44:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-07 09:44:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-09-07 09:44:35,063 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2019-09-07 09:44:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:35,063 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-09-07 09:44:35,064 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:44:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-09-07 09:44:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-07 09:44:35,065 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:35,066 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:35,066 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:35,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:35,067 INFO L82 PathProgramCache]: Analyzing trace with hash 904564754, now seen corresponding path program 1 times [2019-09-07 09:44:35,067 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:35,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:35,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:35,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:35,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:44:35,184 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:44:35,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:44:35,186 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:44:35,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:44:35,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:44:35,187 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 3 states. [2019-09-07 09:44:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:35,227 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2019-09-07 09:44:35,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:44:35,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-09-07 09:44:35,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:35,229 INFO L225 Difference]: With dead ends: 80 [2019-09-07 09:44:35,230 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 09:44:35,231 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:44:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 09:44:35,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-09-07 09:44:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-07 09:44:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-09-07 09:44:35,240 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 29 [2019-09-07 09:44:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:35,242 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-09-07 09:44:35,242 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:44:35,242 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-09-07 09:44:35,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-07 09:44:35,243 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:35,243 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:35,244 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1833019696, now seen corresponding path program 1 times [2019-09-07 09:44:35,247 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:35,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:35,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:35,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:35,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:44:35,325 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:44:35,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:44:35,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:44:35,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:44:35,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:44:35,327 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 3 states. [2019-09-07 09:44:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:35,483 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2019-09-07 09:44:35,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:44:35,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-09-07 09:44:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:35,486 INFO L225 Difference]: With dead ends: 92 [2019-09-07 09:44:35,486 INFO L226 Difference]: Without dead ends: 60 [2019-09-07 09:44:35,487 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:44:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-07 09:44:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2019-09-07 09:44:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-07 09:44:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-09-07 09:44:35,497 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 31 [2019-09-07 09:44:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:35,497 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-09-07 09:44:35,498 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:44:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-09-07 09:44:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 09:44:35,499 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:35,499 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:35,500 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:35,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:35,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1518385952, now seen corresponding path program 1 times [2019-09-07 09:44:35,500 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:35,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:35,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:35,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:35,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 09:44:35,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:35,624 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:35,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:35,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:44:35,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 09:44:35,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:35,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:44:35,788 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:44:35,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:44:35,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:35,790 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 5 states. [2019-09-07 09:44:35,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:35,838 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2019-09-07 09:44:35,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:44:35,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-09-07 09:44:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:35,840 INFO L225 Difference]: With dead ends: 98 [2019-09-07 09:44:35,840 INFO L226 Difference]: Without dead ends: 55 [2019-09-07 09:44:35,841 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-07 09:44:35,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-09-07 09:44:35,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-07 09:44:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2019-09-07 09:44:35,849 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 47 [2019-09-07 09:44:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:35,849 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2019-09-07 09:44:35,849 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:44:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2019-09-07 09:44:35,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-07 09:44:35,855 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:35,855 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:35,855 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:35,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:35,856 INFO L82 PathProgramCache]: Analyzing trace with hash -946140994, now seen corresponding path program 2 times [2019-09-07 09:44:35,856 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:35,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:35,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:35,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:35,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-07 09:44:35,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:35,968 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:35,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:44:36,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:44:36,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:36,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:44:36,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Stream closed [2019-09-07 09:44:36,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:36,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:44:36,064 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:44:36,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:44:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:36,065 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 5 states. [2019-09-07 09:44:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:36,220 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2019-09-07 09:44:36,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:44:36,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2019-09-07 09:44:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:36,222 INFO L225 Difference]: With dead ends: 117 [2019-09-07 09:44:36,222 INFO L226 Difference]: Without dead ends: 78 [2019-09-07 09:44:36,223 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-07 09:44:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2019-09-07 09:44:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-07 09:44:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-09-07 09:44:36,232 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 49 [2019-09-07 09:44:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:36,232 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-09-07 09:44:36,233 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:44:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-09-07 09:44:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-07 09:44:36,235 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:36,235 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:36,235 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:36,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1765015214, now seen corresponding path program 3 times [2019-09-07 09:44:36,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:36,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:36,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:36,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:36,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-09-07 09:44:36,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:36,326 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:44:36,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:36,410 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:44:36,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:36,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:44:36,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Stream closed [2019-09-07 09:44:36,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:36,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 09:44:36,458 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:44:36,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:44:36,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:44:36,459 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 8 states. [2019-09-07 09:44:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:36,683 INFO L93 Difference]: Finished difference Result 156 states and 182 transitions. [2019-09-07 09:44:36,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:44:36,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2019-09-07 09:44:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:36,685 INFO L225 Difference]: With dead ends: 156 [2019-09-07 09:44:36,685 INFO L226 Difference]: Without dead ends: 97 [2019-09-07 09:44:36,686 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:44:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-07 09:44:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2019-09-07 09:44:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-07 09:44:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2019-09-07 09:44:36,709 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 65 [2019-09-07 09:44:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:36,710 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2019-09-07 09:44:36,710 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:44:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2019-09-07 09:44:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-07 09:44:36,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:36,712 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:36,712 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:36,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2072984252, now seen corresponding path program 4 times [2019-09-07 09:44:36,713 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:36,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:36,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:36,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:36,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-09-07 09:44:36,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:36,831 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:44:36,847 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:36,927 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:44:36,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:36,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:44:36,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:44:37,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:37,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-07 09:44:37,006 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:44:37,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:44:37,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:44:37,007 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 10 states. [2019-09-07 09:44:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:37,292 INFO L93 Difference]: Finished difference Result 190 states and 216 transitions. [2019-09-07 09:44:37,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:44:37,292 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2019-09-07 09:44:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:37,294 INFO L225 Difference]: With dead ends: 190 [2019-09-07 09:44:37,294 INFO L226 Difference]: Without dead ends: 115 [2019-09-07 09:44:37,297 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:44:37,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-07 09:44:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2019-09-07 09:44:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-07 09:44:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2019-09-07 09:44:37,316 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 83 [2019-09-07 09:44:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:37,317 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2019-09-07 09:44:37,317 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:44:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2019-09-07 09:44:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-07 09:44:37,322 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:37,322 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:37,322 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:37,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1507504310, now seen corresponding path program 5 times [2019-09-07 09:44:37,323 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:37,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:37,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:37,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:37,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-09-07 09:44:37,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:37,508 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:37,525 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:44:58,773 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 09:44:58,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:58,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:44:58,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-09-07 09:44:58,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:58,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-07 09:44:58,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:44:58,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:44:58,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:44:58,874 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 12 states. [2019-09-07 09:44:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:59,212 INFO L93 Difference]: Finished difference Result 224 states and 250 transitions. [2019-09-07 09:44:59,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:44:59,213 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2019-09-07 09:44:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:59,214 INFO L225 Difference]: With dead ends: 224 [2019-09-07 09:44:59,214 INFO L226 Difference]: Without dead ends: 133 [2019-09-07 09:44:59,215 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:44:59,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-09-07 09:44:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2019-09-07 09:44:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-07 09:44:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2019-09-07 09:44:59,228 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 101 [2019-09-07 09:44:59,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:59,228 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2019-09-07 09:44:59,228 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:44:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2019-09-07 09:44:59,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-07 09:44:59,230 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:59,230 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:59,231 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:59,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1183915096, now seen corresponding path program 6 times [2019-09-07 09:44:59,231 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:59,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:59,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:59,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:59,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-09-07 09:44:59,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:59,350 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:59,365 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:45:03,901 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-09-07 09:45:03,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:03,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:45:03,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2019-09-07 09:45:04,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:04,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2019-09-07 09:45:04,038 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:45:04,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:45:04,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:45:04,039 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 16 states. [2019-09-07 09:45:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:04,453 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2019-09-07 09:45:04,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:45:04,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 119 [2019-09-07 09:45:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:04,455 INFO L225 Difference]: With dead ends: 258 [2019-09-07 09:45:04,455 INFO L226 Difference]: Without dead ends: 151 [2019-09-07 09:45:04,456 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:45:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-07 09:45:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 142. [2019-09-07 09:45:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-07 09:45:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2019-09-07 09:45:04,478 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 119 [2019-09-07 09:45:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:04,482 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2019-09-07 09:45:04,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:45:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2019-09-07 09:45:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-07 09:45:04,484 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:04,485 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:04,486 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:04,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:04,487 INFO L82 PathProgramCache]: Analyzing trace with hash -780828186, now seen corresponding path program 7 times [2019-09-07 09:45:04,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:04,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:04,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:04,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:04,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-09-07 09:45:04,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:04,611 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:04,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:45:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:04,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:45:04,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-09-07 09:45:04,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:04,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 09:45:04,789 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:45:04,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:45:04,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:45:04,790 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand 10 states. [2019-09-07 09:45:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:04,854 INFO L93 Difference]: Finished difference Result 268 states and 286 transitions. [2019-09-07 09:45:04,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 09:45:04,855 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 137 [2019-09-07 09:45:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:04,857 INFO L225 Difference]: With dead ends: 268 [2019-09-07 09:45:04,857 INFO L226 Difference]: Without dead ends: 145 [2019-09-07 09:45:04,859 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:45:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-09-07 09:45:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2019-09-07 09:45:04,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-07 09:45:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 153 transitions. [2019-09-07 09:45:04,890 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 153 transitions. Word has length 137 [2019-09-07 09:45:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:04,890 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 153 transitions. [2019-09-07 09:45:04,890 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:45:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 153 transitions. [2019-09-07 09:45:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-07 09:45:04,894 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:04,894 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:04,894 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:04,895 INFO L82 PathProgramCache]: Analyzing trace with hash -76417532, now seen corresponding path program 8 times [2019-09-07 09:45:04,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:04,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:04,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:04,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:45:04,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-09-07 09:45:05,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:05,103 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:05,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:45:05,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:45:05,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:05,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:45:05,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-09-07 09:45:05,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:05,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2019-09-07 09:45:05,363 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 09:45:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 09:45:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:45:05,364 INFO L87 Difference]: Start difference. First operand 144 states and 153 transitions. Second operand 17 states. [2019-09-07 09:45:05,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:05,693 INFO L93 Difference]: Finished difference Result 294 states and 320 transitions. [2019-09-07 09:45:05,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 09:45:05,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 139 [2019-09-07 09:45:05,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:05,695 INFO L225 Difference]: With dead ends: 294 [2019-09-07 09:45:05,695 INFO L226 Difference]: Without dead ends: 171 [2019-09-07 09:45:05,696 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:45:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-09-07 09:45:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2019-09-07 09:45:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-09-07 09:45:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 171 transitions. [2019-09-07 09:45:05,704 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 171 transitions. Word has length 139 [2019-09-07 09:45:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:05,704 INFO L475 AbstractCegarLoop]: Abstraction has 162 states and 171 transitions. [2019-09-07 09:45:05,704 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 09:45:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 171 transitions. [2019-09-07 09:45:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-07 09:45:05,706 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:05,706 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:05,706 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:05,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1849931630, now seen corresponding path program 9 times [2019-09-07 09:45:05,707 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:05,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:05,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:05,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:05,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2019-09-07 09:45:05,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:05,837 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:45:05,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:25,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-09-07 09:45:25,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:25,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 65 conjunts are in the unsatisfiable core [2019-09-07 09:45:25,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-09-07 09:45:25,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:25,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2019-09-07 09:45:25,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:45:25,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:45:25,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:45:25,751 INFO L87 Difference]: Start difference. First operand 162 states and 171 transitions. Second operand 15 states. [2019-09-07 09:45:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:26,347 INFO L93 Difference]: Finished difference Result 317 states and 349 transitions. [2019-09-07 09:45:26,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:45:26,348 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 157 [2019-09-07 09:45:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:26,350 INFO L225 Difference]: With dead ends: 317 [2019-09-07 09:45:26,350 INFO L226 Difference]: Without dead ends: 194 [2019-09-07 09:45:26,351 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:45:26,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-09-07 09:45:26,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2019-09-07 09:45:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-09-07 09:45:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 203 transitions. [2019-09-07 09:45:26,360 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 203 transitions. Word has length 157 [2019-09-07 09:45:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:26,360 INFO L475 AbstractCegarLoop]: Abstraction has 194 states and 203 transitions. [2019-09-07 09:45:26,360 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:45:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 203 transitions. [2019-09-07 09:45:26,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-07 09:45:26,363 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:26,363 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:26,363 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:26,364 INFO L82 PathProgramCache]: Analyzing trace with hash 897565810, now seen corresponding path program 10 times [2019-09-07 09:45:26,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:26,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:26,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:26,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:26,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-09-07 09:45:26,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:26,609 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:45:26,627 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:26,742 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:45:26,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:26,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:45:26,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-09-07 09:45:26,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:26,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 09:45:26,828 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:45:26,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:45:26,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:45:26,830 INFO L87 Difference]: Start difference. First operand 194 states and 203 transitions. Second operand 12 states. [2019-09-07 09:45:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:26,886 INFO L93 Difference]: Finished difference Result 368 states and 386 transitions. [2019-09-07 09:45:26,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:45:26,886 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 189 [2019-09-07 09:45:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:26,890 INFO L225 Difference]: With dead ends: 368 [2019-09-07 09:45:26,890 INFO L226 Difference]: Without dead ends: 197 [2019-09-07 09:45:26,892 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:45:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-09-07 09:45:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-09-07 09:45:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-09-07 09:45:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2019-09-07 09:45:26,904 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 189 [2019-09-07 09:45:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:26,905 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2019-09-07 09:45:26,905 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:45:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2019-09-07 09:45:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-07 09:45:26,908 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:26,908 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:26,908 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:26,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:26,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1093991024, now seen corresponding path program 11 times [2019-09-07 09:45:26,909 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:26,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:26,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:26,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:26,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-09-07 09:45:27,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:27,104 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:45:27,129 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:46:48,088 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-07 09:46:48,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:46:48,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 09:46:48,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:46:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-09-07 09:46:48,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:46:48,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-09-07 09:46:48,370 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:46:48,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:46:48,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:46:48,372 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand 22 states. [2019-09-07 09:46:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:46:48,835 INFO L93 Difference]: Finished difference Result 394 states and 420 transitions. [2019-09-07 09:46:48,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:46:48,835 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 191 [2019-09-07 09:46:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:46:48,837 INFO L225 Difference]: With dead ends: 394 [2019-09-07 09:46:48,837 INFO L226 Difference]: Without dead ends: 223 [2019-09-07 09:46:48,838 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:46:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-09-07 09:46:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 214. [2019-09-07 09:46:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-09-07 09:46:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 223 transitions. [2019-09-07 09:46:48,845 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 223 transitions. Word has length 191 [2019-09-07 09:46:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:46:48,845 INFO L475 AbstractCegarLoop]: Abstraction has 214 states and 223 transitions. [2019-09-07 09:46:48,845 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:46:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 223 transitions. [2019-09-07 09:46:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-07 09:46:48,848 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:46:48,848 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:46:48,848 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:46:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:46:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2022608158, now seen corresponding path program 12 times [2019-09-07 09:46:48,849 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:46:48,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:46:48,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:48,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:46:48,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:46:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-09-07 09:46:49,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:46:49,053 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:46:49,079 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:56,104 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-07 09:47:56,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:56,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 09:47:56,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 19 proven. 100 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2019-09-07 09:47:56,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:56,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2019-09-07 09:47:56,405 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 09:47:56,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 09:47:56,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 09:47:56,406 INFO L87 Difference]: Start difference. First operand 214 states and 223 transitions. Second operand 26 states. [2019-09-07 09:47:57,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:57,194 INFO L93 Difference]: Finished difference Result 429 states and 456 transitions. [2019-09-07 09:47:57,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 09:47:57,195 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 209 [2019-09-07 09:47:57,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:57,197 INFO L225 Difference]: With dead ends: 429 [2019-09-07 09:47:57,197 INFO L226 Difference]: Without dead ends: 242 [2019-09-07 09:47:57,199 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:47:57,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-09-07 09:47:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 234. [2019-09-07 09:47:57,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-09-07 09:47:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 243 transitions. [2019-09-07 09:47:57,208 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 243 transitions. Word has length 209 [2019-09-07 09:47:57,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:57,208 INFO L475 AbstractCegarLoop]: Abstraction has 234 states and 243 transitions. [2019-09-07 09:47:57,208 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 09:47:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 243 transitions. [2019-09-07 09:47:57,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-09-07 09:47:57,211 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:57,211 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:57,212 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:57,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:57,212 INFO L82 PathProgramCache]: Analyzing trace with hash -312440886, now seen corresponding path program 13 times [2019-09-07 09:47:57,212 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:57,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:57,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:57,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:57,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2019-09-07 09:47:57,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:57,446 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:57,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:47:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:57,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:47:57,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:47:57,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:57,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2019-09-07 09:47:57,790 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 09:47:57,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 09:47:57,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:47:57,791 INFO L87 Difference]: Start difference. First operand 234 states and 243 transitions. Second operand 27 states. [2019-09-07 09:47:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:58,421 INFO L93 Difference]: Finished difference Result 464 states and 490 transitions. [2019-09-07 09:47:58,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 09:47:58,421 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 229 [2019-09-07 09:47:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:58,424 INFO L225 Difference]: With dead ends: 464 [2019-09-07 09:47:58,424 INFO L226 Difference]: Without dead ends: 261 [2019-09-07 09:47:58,425 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:47:58,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-09-07 09:47:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 252. [2019-09-07 09:47:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2019-09-07 09:47:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 261 transitions. [2019-09-07 09:47:58,439 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 261 transitions. Word has length 229 [2019-09-07 09:47:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:58,440 INFO L475 AbstractCegarLoop]: Abstraction has 252 states and 261 transitions. [2019-09-07 09:47:58,440 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 09:47:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 261 transitions. [2019-09-07 09:47:58,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-09-07 09:47:58,447 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:58,448 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:58,448 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash 439530712, now seen corresponding path program 14 times [2019-09-07 09:47:58,449 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:58,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:58,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:58,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:47:58,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2019-09-07 09:47:58,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:58,745 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:47:58,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:58,918 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:47:58,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:58,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:47:58,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2019-09-07 09:47:59,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:59,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2019-09-07 09:47:59,150 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 09:47:59,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 09:47:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:47:59,151 INFO L87 Difference]: Start difference. First operand 252 states and 261 transitions. Second operand 29 states. [2019-09-07 09:47:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:59,684 INFO L93 Difference]: Finished difference Result 498 states and 524 transitions. [2019-09-07 09:47:59,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 09:47:59,686 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 247 [2019-09-07 09:47:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:59,689 INFO L225 Difference]: With dead ends: 498 [2019-09-07 09:47:59,689 INFO L226 Difference]: Without dead ends: 279 [2019-09-07 09:47:59,691 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:47:59,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-09-07 09:47:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 270. [2019-09-07 09:47:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2019-09-07 09:47:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 279 transitions. [2019-09-07 09:47:59,701 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 279 transitions. Word has length 247 [2019-09-07 09:47:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:59,702 INFO L475 AbstractCegarLoop]: Abstraction has 270 states and 279 transitions. [2019-09-07 09:47:59,702 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 09:47:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 279 transitions. [2019-09-07 09:47:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-09-07 09:47:59,704 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:59,704 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:59,704 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:59,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:59,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1203075686, now seen corresponding path program 15 times [2019-09-07 09:47:59,705 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:59,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:59,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:59,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:59,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1379 trivial. 0 not checked. [2019-09-07 09:48:00,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:00,013 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:48:00,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:49:24,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-09-07 09:49:24,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:24,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 44 conjunts are in the unsatisfiable core [2019-09-07 09:49:24,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 52 proven. 169 refuted. 0 times theorem prover too weak. 1327 trivial. 0 not checked. [2019-09-07 09:49:25,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:25,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 21 [2019-09-07 09:49:25,057 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:49:25,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:49:25,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:49:25,058 INFO L87 Difference]: Start difference. First operand 270 states and 279 transitions. Second operand 21 states. [2019-09-07 09:49:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:25,914 INFO L93 Difference]: Finished difference Result 509 states and 541 transitions. [2019-09-07 09:49:25,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 09:49:25,915 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 265 [2019-09-07 09:49:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:25,917 INFO L225 Difference]: With dead ends: 509 [2019-09-07 09:49:25,917 INFO L226 Difference]: Without dead ends: 302 [2019-09-07 09:49:25,919 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=481, Invalid=851, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:49:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-09-07 09:49:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2019-09-07 09:49:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2019-09-07 09:49:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 311 transitions. [2019-09-07 09:49:25,934 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 311 transitions. Word has length 265 [2019-09-07 09:49:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:25,934 INFO L475 AbstractCegarLoop]: Abstraction has 302 states and 311 transitions. [2019-09-07 09:49:25,935 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:49:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 311 transitions. [2019-09-07 09:49:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-09-07 09:49:25,938 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:25,938 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:25,939 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:25,940 INFO L82 PathProgramCache]: Analyzing trace with hash 453879366, now seen corresponding path program 16 times [2019-09-07 09:49:25,940 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:25,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:25,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:25,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:25,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1996 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2019-09-07 09:49:26,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:26,368 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:49:26,399 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:49:26,569 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:49:26,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:26,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:49:26,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1996 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2019-09-07 09:49:26,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:26,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2019-09-07 09:49:26,900 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 09:49:26,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 09:49:26,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:49:26,901 INFO L87 Difference]: Start difference. First operand 302 states and 311 transitions. Second operand 33 states. [2019-09-07 09:49:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:27,687 INFO L93 Difference]: Finished difference Result 596 states and 622 transitions. [2019-09-07 09:49:27,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 09:49:27,688 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 297 [2019-09-07 09:49:27,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:27,690 INFO L225 Difference]: With dead ends: 596 [2019-09-07 09:49:27,691 INFO L226 Difference]: Without dead ends: 329 [2019-09-07 09:49:27,692 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:49:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2019-09-07 09:49:27,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 320. [2019-09-07 09:49:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-09-07 09:49:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 329 transitions. [2019-09-07 09:49:27,704 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 329 transitions. Word has length 297 [2019-09-07 09:49:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:27,705 INFO L475 AbstractCegarLoop]: Abstraction has 320 states and 329 transitions. [2019-09-07 09:49:27,705 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 09:49:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 329 transitions. [2019-09-07 09:49:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-09-07 09:49:27,707 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:27,707 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:27,707 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:27,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:27,708 INFO L82 PathProgramCache]: Analyzing trace with hash 838708308, now seen corresponding path program 17 times [2019-09-07 09:49:27,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:27,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:27,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:27,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:27,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2019-09-07 09:49:28,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:28,173 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:49:28,199 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:52:22,425 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-09-07 09:52:22,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:22,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:52:22,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2019-09-07 09:52:22,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:22,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 09:52:22,680 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:52:22,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:52:22,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:52:22,681 INFO L87 Difference]: Start difference. First operand 320 states and 329 transitions. Second operand 19 states. [2019-09-07 09:52:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:22,762 INFO L93 Difference]: Finished difference Result 606 states and 624 transitions. [2019-09-07 09:52:22,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 09:52:22,763 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 315 [2019-09-07 09:52:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:22,764 INFO L225 Difference]: With dead ends: 606 [2019-09-07 09:52:22,765 INFO L226 Difference]: Without dead ends: 323 [2019-09-07 09:52:22,766 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:52:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2019-09-07 09:52:22,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2019-09-07 09:52:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2019-09-07 09:52:22,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 331 transitions. [2019-09-07 09:52:22,777 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 331 transitions. Word has length 315 [2019-09-07 09:52:22,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:22,777 INFO L475 AbstractCegarLoop]: Abstraction has 322 states and 331 transitions. [2019-09-07 09:52:22,777 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:52:22,777 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 331 transitions. [2019-09-07 09:52:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-09-07 09:52:22,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:22,780 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:22,780 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:22,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:22,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1449476878, now seen corresponding path program 18 times [2019-09-07 09:52:22,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:22,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:22,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:22,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:22,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2019-09-07 09:52:23,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:23,167 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:52:23,199 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:47,117 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-09-07 09:54:47,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:47,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:54:47,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2019-09-07 09:54:47,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:47,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:54:47,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:54:47,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:54:47,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:54:47,339 INFO L87 Difference]: Start difference. First operand 322 states and 331 transitions. Second operand 20 states. [2019-09-07 09:54:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:47,410 INFO L93 Difference]: Finished difference Result 608 states and 626 transitions. [2019-09-07 09:54:47,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:54:47,411 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 317 [2019-09-07 09:54:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:47,413 INFO L225 Difference]: With dead ends: 608 [2019-09-07 09:54:47,413 INFO L226 Difference]: Without dead ends: 325 [2019-09-07 09:54:47,414 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:54:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-09-07 09:54:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 324. [2019-09-07 09:54:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2019-09-07 09:54:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 333 transitions. [2019-09-07 09:54:47,424 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 333 transitions. Word has length 317 [2019-09-07 09:54:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:47,424 INFO L475 AbstractCegarLoop]: Abstraction has 324 states and 333 transitions. [2019-09-07 09:54:47,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:54:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 333 transitions. [2019-09-07 09:54:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2019-09-07 09:54:47,427 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:47,427 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:47,427 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:47,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:47,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1372185072, now seen corresponding path program 19 times [2019-09-07 09:54:47,428 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:47,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:47,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:47,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:47,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2337 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2081 trivial. 0 not checked. [2019-09-07 09:54:47,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:47,808 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:54:47,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:47,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:54:47,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2337 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:54:48,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:48,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2019-09-07 09:54:48,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 09:54:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 09:54:48,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:54:48,472 INFO L87 Difference]: Start difference. First operand 324 states and 333 transitions. Second operand 37 states. [2019-09-07 09:54:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:49,192 INFO L93 Difference]: Finished difference Result 634 states and 660 transitions. [2019-09-07 09:54:49,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 09:54:49,196 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 319 [2019-09-07 09:54:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:49,198 INFO L225 Difference]: With dead ends: 634 [2019-09-07 09:54:49,198 INFO L226 Difference]: Without dead ends: 351 [2019-09-07 09:54:49,199 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:54:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2019-09-07 09:54:49,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 342. [2019-09-07 09:54:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2019-09-07 09:54:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 351 transitions. [2019-09-07 09:54:49,211 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 351 transitions. Word has length 319 [2019-09-07 09:54:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:49,212 INFO L475 AbstractCegarLoop]: Abstraction has 342 states and 351 transitions. [2019-09-07 09:54:49,212 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 09:54:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 351 transitions. [2019-09-07 09:54:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2019-09-07 09:54:49,214 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:49,214 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:49,214 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:49,215 INFO L82 PathProgramCache]: Analyzing trace with hash -277346914, now seen corresponding path program 20 times [2019-09-07 09:54:49,215 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:49,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:49,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:49,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:54:49,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2019-09-07 09:54:49,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:49,655 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:49,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:54:49,824 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:54:49,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:49,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:54:49,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2019-09-07 09:54:50,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:50,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2019-09-07 09:54:50,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 09:54:50,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 09:54:50,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:54:50,225 INFO L87 Difference]: Start difference. First operand 342 states and 351 transitions. Second operand 39 states. [2019-09-07 09:54:51,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:51,018 INFO L93 Difference]: Finished difference Result 668 states and 694 transitions. [2019-09-07 09:54:51,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-07 09:54:51,018 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 337 [2019-09-07 09:54:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:51,021 INFO L225 Difference]: With dead ends: 668 [2019-09-07 09:54:51,021 INFO L226 Difference]: Without dead ends: 369 [2019-09-07 09:54:51,023 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:54:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2019-09-07 09:54:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 360. [2019-09-07 09:54:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2019-09-07 09:54:51,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 369 transitions. [2019-09-07 09:54:51,034 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 369 transitions. Word has length 337 [2019-09-07 09:54:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:51,035 INFO L475 AbstractCegarLoop]: Abstraction has 360 states and 369 transitions. [2019-09-07 09:54:51,035 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 09:54:51,035 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 369 transitions. [2019-09-07 09:54:51,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2019-09-07 09:54:51,037 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:51,038 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:51,038 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:51,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1108403628, now seen corresponding path program 21 times [2019-09-07 09:54:51,038 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:51,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:51,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:51,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:51,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2629 trivial. 0 not checked. [2019-09-07 09:54:51,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:51,559 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:51,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:57:22,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-09-07 09:57:22,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:57:22,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 09:57:22,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:57:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 35 proven. 324 refuted. 0 times theorem prover too weak. 2594 trivial. 0 not checked. [2019-09-07 09:57:22,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:57:22,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 24 [2019-09-07 09:57:22,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 09:57:22,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 09:57:22,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:57:22,843 INFO L87 Difference]: Start difference. First operand 360 states and 369 transitions. Second operand 24 states. [2019-09-07 09:57:23,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:57:23,484 INFO L93 Difference]: Finished difference Result 669 states and 701 transitions. [2019-09-07 09:57:23,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:57:23,484 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 355 [2019-09-07 09:57:23,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:57:23,486 INFO L225 Difference]: With dead ends: 669 [2019-09-07 09:57:23,487 INFO L226 Difference]: Without dead ends: 392 [2019-09-07 09:57:23,487 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:57:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2019-09-07 09:57:23,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2019-09-07 09:57:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2019-09-07 09:57:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 401 transitions. [2019-09-07 09:57:23,500 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 401 transitions. Word has length 355 [2019-09-07 09:57:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:57:23,500 INFO L475 AbstractCegarLoop]: Abstraction has 392 states and 401 transitions. [2019-09-07 09:57:23,500 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 09:57:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 401 transitions. [2019-09-07 09:57:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2019-09-07 09:57:23,503 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:57:23,503 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:57:23,504 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:57:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:57:23,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1381107316, now seen corresponding path program 22 times [2019-09-07 09:57:23,504 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:57:23,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:57:23,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:23,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:57:23,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:57:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2019-09-07 09:57:24,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:57:24,007 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:57:24,025 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:57:24,190 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:57:24,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:57:24,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:57:24,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:57:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2019-09-07 09:57:24,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:57:24,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 09:57:24,317 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:57:24,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:57:24,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:57:24,318 INFO L87 Difference]: Start difference. First operand 392 states and 401 transitions. Second operand 23 states. [2019-09-07 09:57:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:57:24,425 INFO L93 Difference]: Finished difference Result 742 states and 760 transitions. [2019-09-07 09:57:24,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:57:24,426 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 387 [2019-09-07 09:57:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:57:24,428 INFO L225 Difference]: With dead ends: 742 [2019-09-07 09:57:24,428 INFO L226 Difference]: Without dead ends: 395 [2019-09-07 09:57:24,432 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:57:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2019-09-07 09:57:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 394. [2019-09-07 09:57:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2019-09-07 09:57:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 403 transitions. [2019-09-07 09:57:24,450 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 403 transitions. Word has length 387 [2019-09-07 09:57:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:57:24,451 INFO L475 AbstractCegarLoop]: Abstraction has 394 states and 403 transitions. [2019-09-07 09:57:24,451 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:57:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 403 transitions. [2019-09-07 09:57:24,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2019-09-07 09:57:24,455 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:57:24,456 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:57:24,456 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:57:24,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:57:24,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1746115626, now seen corresponding path program 23 times [2019-09-07 09:57:24,457 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:57:24,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:57:24,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:24,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:57:24,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:57:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2019-09-07 09:57:25,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:57:25,220 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:57:25,235 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000