/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:09:29,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:09:29,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:09:29,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-22 02:09:29,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-22 02:09:29,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-22 02:09:29,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-22 02:09:29,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-22 02:09:29,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-22 02:09:29,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-22 02:09:29,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-22 02:09:29,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-22 02:09:29,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-22 02:09:29,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-22 02:09:29,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-22 02:09:29,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-22 02:09:29,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-22 02:09:29,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-22 02:09:29,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-22 02:09:29,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-22 02:09:29,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-22 02:09:29,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-22 02:09:29,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-22 02:09:29,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-22 02:09:29,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-22 02:09:29,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-22 02:09:29,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-22 02:09:29,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-22 02:09:29,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-22 02:09:29,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-22 02:09:29,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-22 02:09:29,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-22 02:09:29,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-22 02:09:29,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-22 02:09:29,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-22 02:09:29,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-22 02:09:29,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-22 02:09:29,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-22 02:09:29,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:09:29,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:09:29,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:09:29,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 02:09:29,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:09:29,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:09:29,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:09:29,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:09:29,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:09:29,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:09:29,771 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:09:29,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:09:29,772 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:09:29,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:09:29,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:09:29,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:09:29,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:09:29,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:09:29,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:09:29,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:09:29,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:09:29,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:09:29,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:09:29,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:09:29,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:09:29,774 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:09:29,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:09:29,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:09:29,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:09:29,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:09:29,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:09:29,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:09:29,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:09:29,775 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:09:29,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:09:29,775 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:09:29,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:09:30,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:09:30,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:09:30,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:09:30,064 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:09:30,065 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:09:30,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl [2021-05-22 02:09:30,066 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl' [2021-05-22 02:09:30,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:09:30,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:09:30,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:09:30,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:09:30,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:09:30,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:09:30" (1/1) ... [2021-05-22 02:09:30,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:09:30" (1/1) ... [2021-05-22 02:09:30,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:09:30,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:09:30,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:09:30,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:09:30,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:09:30" (1/1) ... [2021-05-22 02:09:30,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:09:30" (1/1) ... [2021-05-22 02:09:30,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:09:30" (1/1) ... [2021-05-22 02:09:30,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:09:30" (1/1) ... [2021-05-22 02:09:30,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:09:30" (1/1) ... [2021-05-22 02:09:30,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:09:30" (1/1) ... [2021-05-22 02:09:30,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:09:30" (1/1) ... [2021-05-22 02:09:30,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:09:30,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:09:30,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:09:30,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:09:30,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:09:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:09:30,234 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:09:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:09:30,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:09:30,235 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:09:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:09:30,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:09:30,235 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:09:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:09:30,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:09:30,235 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:09:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:09:30,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:09:30,236 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:09:30,455 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:09:30,455 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:09:30,457 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:09:30 BoogieIcfgContainer [2021-05-22 02:09:30,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:09:30,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:09:30,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:09:30,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:09:30,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:09:30" (1/2) ... [2021-05-22 02:09:30,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f209f24 and model type mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:09:30, skipping insertion in model container [2021-05-22 02:09:30,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:09:30" (2/2) ... [2021-05-22 02:09:30,463 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.bpl [2021-05-22 02:09:30,468 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:09:30,468 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:09:30,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:09:30,481 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:09:30,514 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:09:30,531 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:09:30,568 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:09:30,568 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:09:30,568 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:09:30,568 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:09:30,569 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:09:30,569 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:09:30,569 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:09:30,569 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:09:30,576 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-05-22 02:09:30,602 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:30,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:09:30,615 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:30,616 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:30,616 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:30,626 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-05-22 02:09:30,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:30,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675856315] [2021-05-22 02:09:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:30,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:30,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675856315] [2021-05-22 02:09:30,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675856315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:09:30,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:09:30,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 02:09:30,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833185893] [2021-05-22 02:09:30,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:09:30,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:30,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:09:30,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:09:30,874 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:30,909 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-05-22 02:09:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:09:30,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:09:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:30,920 INFO L225 Difference]: With dead ends: 214 [2021-05-22 02:09:30,920 INFO L226 Difference]: Without dead ends: 199 [2021-05-22 02:09:30,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:09:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-22 02:09:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-05-22 02:09:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-05-22 02:09:30,969 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-05-22 02:09:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:30,970 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-05-22 02:09:30,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-05-22 02:09:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:09:30,972 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:30,972 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:30,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:09:30,973 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:30,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-05-22 02:09:30,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:30,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647297136] [2021-05-22 02:09:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:31,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:31,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647297136] [2021-05-22 02:09:31,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647297136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:31,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515044557] [2021-05-22 02:09:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:31,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:09:31,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:31,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515044557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:31,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:31,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-22 02:09:31,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299890274] [2021-05-22 02:09:31,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:09:31,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:09:31,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:09:31,149 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:31,245 INFO L93 Difference]: Finished difference Result 344 states and 959 transitions. [2021-05-22 02:09:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:09:31,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:09:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:31,251 INFO L225 Difference]: With dead ends: 344 [2021-05-22 02:09:31,251 INFO L226 Difference]: Without dead ends: 344 [2021-05-22 02:09:31,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:09:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-22 02:09:31,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 172. [2021-05-22 02:09:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.953216374269006) internal successors, (505), 171 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 505 transitions. [2021-05-22 02:09:31,286 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 505 transitions. Word has length 17 [2021-05-22 02:09:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:31,286 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 505 transitions. [2021-05-22 02:09:31,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,287 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 505 transitions. [2021-05-22 02:09:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:09:31,288 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:31,288 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:31,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-22 02:09:31,489 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:31,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:31,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-05-22 02:09:31,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:31,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746161374] [2021-05-22 02:09:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:31,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:31,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746161374] [2021-05-22 02:09:31,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746161374] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:09:31,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:09:31,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:09:31,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658015241] [2021-05-22 02:09:31,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:09:31,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:31,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:09:31,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:09:31,546 INFO L87 Difference]: Start difference. First operand 172 states and 505 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:31,601 INFO L93 Difference]: Finished difference Result 237 states and 639 transitions. [2021-05-22 02:09:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:09:31,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:09:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:31,606 INFO L225 Difference]: With dead ends: 237 [2021-05-22 02:09:31,606 INFO L226 Difference]: Without dead ends: 227 [2021-05-22 02:09:31,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:09:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-22 02:09:31,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 186. [2021-05-22 02:09:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.843243243243243) internal successors, (526), 185 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 526 transitions. [2021-05-22 02:09:31,616 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 526 transitions. Word has length 17 [2021-05-22 02:09:31,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:31,616 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 526 transitions. [2021-05-22 02:09:31,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 526 transitions. [2021-05-22 02:09:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:09:31,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:31,625 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:31,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:09:31,625 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:31,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:31,626 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-05-22 02:09:31,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:31,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618367219] [2021-05-22 02:09:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:31,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:31,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618367219] [2021-05-22 02:09:31,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618367219] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:09:31,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:09:31,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:09:31,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100012704] [2021-05-22 02:09:31,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:09:31,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:31,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:09:31,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:09:31,667 INFO L87 Difference]: Start difference. First operand 186 states and 526 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:31,727 INFO L93 Difference]: Finished difference Result 241 states and 641 transitions. [2021-05-22 02:09:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:09:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:09:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:31,731 INFO L225 Difference]: With dead ends: 241 [2021-05-22 02:09:31,731 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:09:31,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:09:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:09:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 192. [2021-05-22 02:09:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.8272251308900525) internal successors, (540), 191 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 540 transitions. [2021-05-22 02:09:31,747 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 540 transitions. Word has length 17 [2021-05-22 02:09:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:31,747 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 540 transitions. [2021-05-22 02:09:31,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 540 transitions. [2021-05-22 02:09:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:09:31,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:31,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:31,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:09:31,751 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:31,752 INFO L82 PathProgramCache]: Analyzing trace with hash -189703520, now seen corresponding path program 2 times [2021-05-22 02:09:31,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:31,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157344852] [2021-05-22 02:09:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:31,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:31,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157344852] [2021-05-22 02:09:31,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157344852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:09:31,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:09:31,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:09:31,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138501615] [2021-05-22 02:09:31,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:09:31,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:31,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:09:31,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:09:31,790 INFO L87 Difference]: Start difference. First operand 192 states and 540 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:31,810 INFO L93 Difference]: Finished difference Result 214 states and 609 transitions. [2021-05-22 02:09:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:09:31,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:09:31,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:31,812 INFO L225 Difference]: With dead ends: 214 [2021-05-22 02:09:31,812 INFO L226 Difference]: Without dead ends: 214 [2021-05-22 02:09:31,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:09:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-22 02:09:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-05-22 02:09:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-05-22 02:09:31,821 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-05-22 02:09:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:31,821 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-05-22 02:09:31,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-05-22 02:09:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:09:31,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:31,822 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:31,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:09:31,822 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:31,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:31,823 INFO L82 PathProgramCache]: Analyzing trace with hash -142653028, now seen corresponding path program 3 times [2021-05-22 02:09:31,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:31,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288398644] [2021-05-22 02:09:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:31,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:31,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288398644] [2021-05-22 02:09:31,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288398644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:09:31,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:09:31,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:09:31,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341844408] [2021-05-22 02:09:31,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:09:31,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:31,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:09:31,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:09:31,851 INFO L87 Difference]: Start difference. First operand 189 states and 542 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:31,880 INFO L93 Difference]: Finished difference Result 254 states and 707 transitions. [2021-05-22 02:09:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:09:31,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:09:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:31,882 INFO L225 Difference]: With dead ends: 254 [2021-05-22 02:09:31,882 INFO L226 Difference]: Without dead ends: 254 [2021-05-22 02:09:31,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:09:31,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-22 02:09:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2021-05-22 02:09:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.894230769230769) internal successors, (602), 208 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 602 transitions. [2021-05-22 02:09:31,890 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 602 transitions. Word has length 17 [2021-05-22 02:09:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:31,890 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 602 transitions. [2021-05-22 02:09:31,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 602 transitions. [2021-05-22 02:09:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:09:31,891 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:31,891 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:31,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:09:31,891 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:31,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 2 times [2021-05-22 02:09:31,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:31,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197268394] [2021-05-22 02:09:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:31,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:31,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197268394] [2021-05-22 02:09:31,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197268394] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:09:31,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:09:31,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:09:31,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087225765] [2021-05-22 02:09:31,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:09:31,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:31,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:09:31,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:09:31,922 INFO L87 Difference]: Start difference. First operand 209 states and 602 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:31,944 INFO L93 Difference]: Finished difference Result 245 states and 714 transitions. [2021-05-22 02:09:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:09:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:09:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:31,946 INFO L225 Difference]: With dead ends: 245 [2021-05-22 02:09:31,947 INFO L226 Difference]: Without dead ends: 245 [2021-05-22 02:09:31,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:09:31,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-22 02:09:31,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2021-05-22 02:09:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9624413145539905) internal successors, (631), 213 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 631 transitions. [2021-05-22 02:09:31,954 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 631 transitions. Word has length 17 [2021-05-22 02:09:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:31,955 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 631 transitions. [2021-05-22 02:09:31,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 631 transitions. [2021-05-22 02:09:31,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:09:31,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:31,956 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:31,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:09:31,956 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash -768893542, now seen corresponding path program 3 times [2021-05-22 02:09:31,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:31,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888442584] [2021-05-22 02:09:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:31,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:31,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888442584] [2021-05-22 02:09:31,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888442584] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:09:31,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:09:31,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:09:31,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743192642] [2021-05-22 02:09:31,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:09:31,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:31,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:09:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:09:31,996 INFO L87 Difference]: Start difference. First operand 214 states and 631 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:32,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:32,027 INFO L93 Difference]: Finished difference Result 237 states and 678 transitions. [2021-05-22 02:09:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:09:32,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:09:32,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:32,029 INFO L225 Difference]: With dead ends: 237 [2021-05-22 02:09:32,029 INFO L226 Difference]: Without dead ends: 225 [2021-05-22 02:09:32,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:09:32,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-22 02:09:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 193. [2021-05-22 02:09:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9583333333333335) internal successors, (568), 192 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 568 transitions. [2021-05-22 02:09:32,035 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 568 transitions. Word has length 17 [2021-05-22 02:09:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:32,036 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 568 transitions. [2021-05-22 02:09:32,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 568 transitions. [2021-05-22 02:09:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:09:32,037 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:32,037 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:32,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:09:32,037 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1586125762, now seen corresponding path program 1 times [2021-05-22 02:09:32,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:32,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026883272] [2021-05-22 02:09:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:32,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:32,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026883272] [2021-05-22 02:09:32,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026883272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:32,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672115767] [2021-05-22 02:09:32,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:32,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:09:32,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:32,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672115767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:32,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:32,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-05-22 02:09:32,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281023528] [2021-05-22 02:09:32,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:09:32,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:32,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:09:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:09:32,198 INFO L87 Difference]: Start difference. First operand 193 states and 568 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:32,275 INFO L93 Difference]: Finished difference Result 254 states and 739 transitions. [2021-05-22 02:09:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:09:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:09:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:32,278 INFO L225 Difference]: With dead ends: 254 [2021-05-22 02:09:32,278 INFO L226 Difference]: Without dead ends: 254 [2021-05-22 02:09:32,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-22 02:09:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 190. [2021-05-22 02:09:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9100529100529102) internal successors, (550), 189 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 550 transitions. [2021-05-22 02:09:32,290 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 550 transitions. Word has length 19 [2021-05-22 02:09:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:32,291 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 550 transitions. [2021-05-22 02:09:32,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 550 transitions. [2021-05-22 02:09:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:09:32,292 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:32,292 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:32,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:32,515 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:32,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-05-22 02:09:32,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:32,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380864962] [2021-05-22 02:09:32,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:32,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:32,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380864962] [2021-05-22 02:09:32,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380864962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:32,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153515647] [2021-05-22 02:09:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:32,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:09:32,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:32,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153515647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:32,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:32,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-22 02:09:32,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192106776] [2021-05-22 02:09:32,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:32,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:32,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:32,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:32,732 INFO L87 Difference]: Start difference. First operand 190 states and 550 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:32,852 INFO L93 Difference]: Finished difference Result 342 states and 999 transitions. [2021-05-22 02:09:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:09:32,853 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:09:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:32,855 INFO L225 Difference]: With dead ends: 342 [2021-05-22 02:09:32,855 INFO L226 Difference]: Without dead ends: 327 [2021-05-22 02:09:32,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:09:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-22 02:09:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 245. [2021-05-22 02:09:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9836065573770494) internal successors, (728), 244 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 728 transitions. [2021-05-22 02:09:32,863 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 728 transitions. Word has length 21 [2021-05-22 02:09:32,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:32,863 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 728 transitions. [2021-05-22 02:09:32,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:32,863 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 728 transitions. [2021-05-22 02:09:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:09:32,864 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:32,864 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:33,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-22 02:09:33,082 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:33,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1334485332, now seen corresponding path program 2 times [2021-05-22 02:09:33,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:33,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736014539] [2021-05-22 02:09:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:33,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:33,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736014539] [2021-05-22 02:09:33,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736014539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:33,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928917714] [2021-05-22 02:09:33,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:33,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:33,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:09:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:33,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928917714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:33,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:33,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-22 02:09:33,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73416644] [2021-05-22 02:09:33,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:33,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:33,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:33,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:33,330 INFO L87 Difference]: Start difference. First operand 245 states and 728 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:33,445 INFO L93 Difference]: Finished difference Result 394 states and 1167 transitions. [2021-05-22 02:09:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:09:33,445 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:09:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:33,447 INFO L225 Difference]: With dead ends: 394 [2021-05-22 02:09:33,448 INFO L226 Difference]: Without dead ends: 379 [2021-05-22 02:09:33,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:09:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-22 02:09:33,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 280. [2021-05-22 02:09:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.978494623655914) internal successors, (831), 279 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 831 transitions. [2021-05-22 02:09:33,457 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 831 transitions. Word has length 21 [2021-05-22 02:09:33,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:33,457 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 831 transitions. [2021-05-22 02:09:33,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 831 transitions. [2021-05-22 02:09:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:09:33,460 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:33,460 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:33,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:33,683 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:33,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1241595234, now seen corresponding path program 3 times [2021-05-22 02:09:33,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:33,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171479755] [2021-05-22 02:09:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:33,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:33,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171479755] [2021-05-22 02:09:33,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171479755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:33,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788084797] [2021-05-22 02:09:33,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:33,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:09:33,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:33,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:09:33,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:33,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788084797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:33,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:33,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-22 02:09:33,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810630023] [2021-05-22 02:09:33,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:33,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:33,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:33,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:33,957 INFO L87 Difference]: Start difference. First operand 280 states and 831 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:34,045 INFO L93 Difference]: Finished difference Result 413 states and 1224 transitions. [2021-05-22 02:09:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:09:34,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:09:34,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:34,048 INFO L225 Difference]: With dead ends: 413 [2021-05-22 02:09:34,048 INFO L226 Difference]: Without dead ends: 398 [2021-05-22 02:09:34,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:09:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-22 02:09:34,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 292. [2021-05-22 02:09:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.979381443298969) internal successors, (867), 291 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 867 transitions. [2021-05-22 02:09:34,060 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 867 transitions. Word has length 21 [2021-05-22 02:09:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:34,060 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 867 transitions. [2021-05-22 02:09:34,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 867 transitions. [2021-05-22 02:09:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:09:34,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:34,063 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:34,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-22 02:09:34,285 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash 204187218, now seen corresponding path program 4 times [2021-05-22 02:09:34,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:34,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50845871] [2021-05-22 02:09:34,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:34,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:34,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50845871] [2021-05-22 02:09:34,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50845871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:34,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926709038] [2021-05-22 02:09:34,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:34,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:34,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:34,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:09:34,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:34,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926709038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:34,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:34,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-22 02:09:34,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117606997] [2021-05-22 02:09:34,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:34,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:34,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:34,557 INFO L87 Difference]: Start difference. First operand 292 states and 867 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:34,665 INFO L93 Difference]: Finished difference Result 421 states and 1248 transitions. [2021-05-22 02:09:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:09:34,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:09:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:34,668 INFO L225 Difference]: With dead ends: 421 [2021-05-22 02:09:34,668 INFO L226 Difference]: Without dead ends: 406 [2021-05-22 02:09:34,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:09:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-22 02:09:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 316. [2021-05-22 02:09:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.980952380952381) internal successors, (939), 315 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 939 transitions. [2021-05-22 02:09:34,679 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 939 transitions. Word has length 21 [2021-05-22 02:09:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:34,679 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 939 transitions. [2021-05-22 02:09:34,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 939 transitions. [2021-05-22 02:09:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:09:34,681 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:34,681 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:34,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:34,904 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:34,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:34,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1380051106, now seen corresponding path program 5 times [2021-05-22 02:09:34,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:34,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158128014] [2021-05-22 02:09:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:34,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:34,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158128014] [2021-05-22 02:09:34,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158128014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:34,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754871939] [2021-05-22 02:09:34,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:35,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:35,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:35,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:09:35,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:35,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754871939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:35,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:35,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-22 02:09:35,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999986959] [2021-05-22 02:09:35,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:35,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:35,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:35,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:35,108 INFO L87 Difference]: Start difference. First operand 316 states and 939 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:35,197 INFO L93 Difference]: Finished difference Result 491 states and 1452 transitions. [2021-05-22 02:09:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:09:35,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:09:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:35,200 INFO L225 Difference]: With dead ends: 491 [2021-05-22 02:09:35,200 INFO L226 Difference]: Without dead ends: 476 [2021-05-22 02:09:35,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:09:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-05-22 02:09:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 341. [2021-05-22 02:09:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-05-22 02:09:35,210 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-05-22 02:09:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:35,210 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-05-22 02:09:35,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:35,211 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-05-22 02:09:35,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:09:35,212 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:35,212 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:35,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-22 02:09:35,434 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:35,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1758862818, now seen corresponding path program 6 times [2021-05-22 02:09:35,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:35,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672410001] [2021-05-22 02:09:35,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:35,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:35,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672410001] [2021-05-22 02:09:35,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672410001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:35,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723395641] [2021-05-22 02:09:35,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:35,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:09:35,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:35,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:09:35,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:35,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723395641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:35,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:35,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-22 02:09:35,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911609620] [2021-05-22 02:09:35,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:35,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:35,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:35,634 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:35,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:35,737 INFO L93 Difference]: Finished difference Result 473 states and 1400 transitions. [2021-05-22 02:09:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:09:35,737 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:09:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:35,740 INFO L225 Difference]: With dead ends: 473 [2021-05-22 02:09:35,740 INFO L226 Difference]: Without dead ends: 458 [2021-05-22 02:09:35,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:09:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-22 02:09:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 341. [2021-05-22 02:09:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-05-22 02:09:35,749 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-05-22 02:09:35,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:35,750 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-05-22 02:09:35,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:35,750 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-05-22 02:09:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:35,751 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:35,751 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:35,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-22 02:09:35,965 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:35,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1287155254, now seen corresponding path program 7 times [2021-05-22 02:09:35,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:35,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572715367] [2021-05-22 02:09:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:36,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572715367] [2021-05-22 02:09:36,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572715367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957537357] [2021-05-22 02:09:36,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:36,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:36,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:36,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957537357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:36,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:36,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-22 02:09:36,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666301020] [2021-05-22 02:09:36,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:36,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:36,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:36,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:36,119 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:36,281 INFO L93 Difference]: Finished difference Result 749 states and 2150 transitions. [2021-05-22 02:09:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:09:36,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:36,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:36,285 INFO L225 Difference]: With dead ends: 749 [2021-05-22 02:09:36,286 INFO L226 Difference]: Without dead ends: 749 [2021-05-22 02:09:36,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-05-22 02:09:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 430. [2021-05-22 02:09:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2021-05-22 02:09:36,301 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 23 [2021-05-22 02:09:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:36,301 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2021-05-22 02:09:36,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2021-05-22 02:09:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:36,303 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:36,303 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:36,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-22 02:09:36,526 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:36,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:36,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1821721226, now seen corresponding path program 8 times [2021-05-22 02:09:36,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:36,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570239560] [2021-05-22 02:09:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:36,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:36,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570239560] [2021-05-22 02:09:36,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570239560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:36,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843937553] [2021-05-22 02:09:36,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:36,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:36,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:36,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:36,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:36,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843937553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:36,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:36,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-22 02:09:36,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010661929] [2021-05-22 02:09:36,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:36,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:36,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:36,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:36,681 INFO L87 Difference]: Start difference. First operand 430 states and 1334 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:36,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:36,809 INFO L93 Difference]: Finished difference Result 758 states and 2270 transitions. [2021-05-22 02:09:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:09:36,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:36,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:36,814 INFO L225 Difference]: With dead ends: 758 [2021-05-22 02:09:36,814 INFO L226 Difference]: Without dead ends: 733 [2021-05-22 02:09:36,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:09:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-05-22 02:09:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 583. [2021-05-22 02:09:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.1597938144329896) internal successors, (1839), 582 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1839 transitions. [2021-05-22 02:09:36,831 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1839 transitions. Word has length 23 [2021-05-22 02:09:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:36,831 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1839 transitions. [2021-05-22 02:09:36,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1839 transitions. [2021-05-22 02:09:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:36,833 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:36,833 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:37,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:09:37,057 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:37,057 INFO L82 PathProgramCache]: Analyzing trace with hash -63390266, now seen corresponding path program 9 times [2021-05-22 02:09:37,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:37,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4980773] [2021-05-22 02:09:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:37,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:37,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4980773] [2021-05-22 02:09:37,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4980773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:37,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57847705] [2021-05-22 02:09:37,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:37,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:09:37,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:37,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:37,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:37,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57847705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:37,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:37,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-22 02:09:37,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044969298] [2021-05-22 02:09:37,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:09:37,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:37,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:09:37,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:09:37,190 INFO L87 Difference]: Start difference. First operand 583 states and 1839 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:37,280 INFO L93 Difference]: Finished difference Result 1311 states and 4123 transitions. [2021-05-22 02:09:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:09:37,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:37,287 INFO L225 Difference]: With dead ends: 1311 [2021-05-22 02:09:37,287 INFO L226 Difference]: Without dead ends: 1275 [2021-05-22 02:09:37,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:09:37,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-05-22 02:09:37,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 821. [2021-05-22 02:09:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.34390243902439) internal successors, (2742), 820 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2742 transitions. [2021-05-22 02:09:37,313 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2742 transitions. Word has length 23 [2021-05-22 02:09:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:37,313 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2742 transitions. [2021-05-22 02:09:37,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2742 transitions. [2021-05-22 02:09:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:37,315 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:37,316 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:37,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-22 02:09:37,539 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:37,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:37,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1548958394, now seen corresponding path program 10 times [2021-05-22 02:09:37,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:37,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255394319] [2021-05-22 02:09:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:37,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:37,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255394319] [2021-05-22 02:09:37,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255394319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:37,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259696545] [2021-05-22 02:09:37,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:37,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:37,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:37,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:37,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:37,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259696545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:37,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:37,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-22 02:09:37,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374156664] [2021-05-22 02:09:37,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:09:37,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:37,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:09:37,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:09:37,665 INFO L87 Difference]: Start difference. First operand 821 states and 2742 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:37,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:37,769 INFO L93 Difference]: Finished difference Result 1047 states and 3326 transitions. [2021-05-22 02:09:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:09:37,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:37,774 INFO L225 Difference]: With dead ends: 1047 [2021-05-22 02:09:37,774 INFO L226 Difference]: Without dead ends: 1047 [2021-05-22 02:09:37,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:09:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-05-22 02:09:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 829. [2021-05-22 02:09:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.321256038647343) internal successors, (2750), 828 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2750 transitions. [2021-05-22 02:09:37,796 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2750 transitions. Word has length 23 [2021-05-22 02:09:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:37,797 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2750 transitions. [2021-05-22 02:09:37,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2750 transitions. [2021-05-22 02:09:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:37,799 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:37,799 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:38,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:38,022 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1102347518, now seen corresponding path program 11 times [2021-05-22 02:09:38,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:38,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74612819] [2021-05-22 02:09:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:38,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:38,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74612819] [2021-05-22 02:09:38,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74612819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:38,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264717244] [2021-05-22 02:09:38,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:38,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:09:38,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:38,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:38,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264717244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:38,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:38,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-22 02:09:38,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540350195] [2021-05-22 02:09:38,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:09:38,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:38,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:09:38,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:09:38,132 INFO L87 Difference]: Start difference. First operand 829 states and 2750 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:38,229 INFO L93 Difference]: Finished difference Result 1062 states and 3341 transitions. [2021-05-22 02:09:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:09:38,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:38,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:38,234 INFO L225 Difference]: With dead ends: 1062 [2021-05-22 02:09:38,234 INFO L226 Difference]: Without dead ends: 1056 [2021-05-22 02:09:38,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:09:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-05-22 02:09:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 852. [2021-05-22 02:09:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.2925969447708576) internal successors, (2802), 851 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2802 transitions. [2021-05-22 02:09:38,257 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2802 transitions. Word has length 23 [2021-05-22 02:09:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:38,258 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2802 transitions. [2021-05-22 02:09:38,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2802 transitions. [2021-05-22 02:09:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:38,260 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:38,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:38,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-05-22 02:09:38,483 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:38,483 INFO L82 PathProgramCache]: Analyzing trace with hash 50200326, now seen corresponding path program 12 times [2021-05-22 02:09:38,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:38,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151147811] [2021-05-22 02:09:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:38,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151147811] [2021-05-22 02:09:38,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151147811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840736483] [2021-05-22 02:09:38,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:38,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:09:38,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:38,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:38,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:38,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840736483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:38,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:38,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-22 02:09:38,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344787868] [2021-05-22 02:09:38,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:38,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:38,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:38,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:38,626 INFO L87 Difference]: Start difference. First operand 852 states and 2802 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:39,035 INFO L93 Difference]: Finished difference Result 2185 states and 6702 transitions. [2021-05-22 02:09:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:09:39,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:39,046 INFO L225 Difference]: With dead ends: 2185 [2021-05-22 02:09:39,046 INFO L226 Difference]: Without dead ends: 2149 [2021-05-22 02:09:39,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:09:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-05-22 02:09:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 941. [2021-05-22 02:09:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.331914893617021) internal successors, (3132), 940 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3132 transitions. [2021-05-22 02:09:39,081 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3132 transitions. Word has length 23 [2021-05-22 02:09:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:39,082 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3132 transitions. [2021-05-22 02:09:39,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3132 transitions. [2021-05-22 02:09:39,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:39,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:39,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:39,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:39,297 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:39,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:39,298 INFO L82 PathProgramCache]: Analyzing trace with hash -32096124, now seen corresponding path program 13 times [2021-05-22 02:09:39,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:39,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949649009] [2021-05-22 02:09:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:39,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:39,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949649009] [2021-05-22 02:09:39,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949649009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:39,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754877099] [2021-05-22 02:09:39,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:39,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:39,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754877099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:39,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:39,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-22 02:09:39,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954820779] [2021-05-22 02:09:39,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:09:39,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:39,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:09:39,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:09:39,430 INFO L87 Difference]: Start difference. First operand 941 states and 3132 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:39,530 INFO L93 Difference]: Finished difference Result 1660 states and 5311 transitions. [2021-05-22 02:09:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:09:39,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:39,538 INFO L225 Difference]: With dead ends: 1660 [2021-05-22 02:09:39,538 INFO L226 Difference]: Without dead ends: 1660 [2021-05-22 02:09:39,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:09:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-05-22 02:09:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1146. [2021-05-22 02:09:39,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.4) internal successors, (3893), 1145 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3893 transitions. [2021-05-22 02:09:39,572 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3893 transitions. Word has length 23 [2021-05-22 02:09:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:39,572 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3893 transitions. [2021-05-22 02:09:39,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3893 transitions. [2021-05-22 02:09:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:39,575 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:39,575 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:39,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-22 02:09:39,789 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:39,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1539696380, now seen corresponding path program 14 times [2021-05-22 02:09:39,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:39,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224750317] [2021-05-22 02:09:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:39,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:39,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224750317] [2021-05-22 02:09:39,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224750317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:39,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471258454] [2021-05-22 02:09:39,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:39,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:39,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:39,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:39,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471258454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:39,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:39,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-22 02:09:39,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566641492] [2021-05-22 02:09:39,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:09:39,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:39,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:09:39,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:09:39,920 INFO L87 Difference]: Start difference. First operand 1146 states and 3893 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:40,354 INFO L93 Difference]: Finished difference Result 2541 states and 8351 transitions. [2021-05-22 02:09:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:09:40,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:40,365 INFO L225 Difference]: With dead ends: 2541 [2021-05-22 02:09:40,365 INFO L226 Difference]: Without dead ends: 2369 [2021-05-22 02:09:40,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:09:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-05-22 02:09:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1684. [2021-05-22 02:09:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.474747474747475) internal successors, (5848), 1683 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5848 transitions. [2021-05-22 02:09:40,406 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5848 transitions. Word has length 23 [2021-05-22 02:09:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:40,406 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 5848 transitions. [2021-05-22 02:09:40,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5848 transitions. [2021-05-22 02:09:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:40,410 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:40,410 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:40,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:40,632 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:40,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:40,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2142929212, now seen corresponding path program 15 times [2021-05-22 02:09:40,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:40,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789287010] [2021-05-22 02:09:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:40,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:40,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789287010] [2021-05-22 02:09:40,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789287010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:40,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838961987] [2021-05-22 02:09:40,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:40,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:09:40,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:40,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:40,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:40,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838961987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:40,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:40,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-22 02:09:40,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279396081] [2021-05-22 02:09:40,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:09:40,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:40,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:09:40,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:09:40,755 INFO L87 Difference]: Start difference. First operand 1684 states and 5848 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:41,127 INFO L93 Difference]: Finished difference Result 4179 states and 14030 transitions. [2021-05-22 02:09:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:09:41,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:41,138 INFO L225 Difference]: With dead ends: 4179 [2021-05-22 02:09:41,138 INFO L226 Difference]: Without dead ends: 4076 [2021-05-22 02:09:41,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:09:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-05-22 02:09:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2798. [2021-05-22 02:09:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.5723989989274223) internal successors, (9992), 2797 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 9992 transitions. [2021-05-22 02:09:41,211 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 9992 transitions. Word has length 23 [2021-05-22 02:09:41,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:41,211 INFO L482 AbstractCegarLoop]: Abstraction has 2798 states and 9992 transitions. [2021-05-22 02:09:41,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:41,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 9992 transitions. [2021-05-22 02:09:41,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:41,218 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:41,218 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:41,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-22 02:09:41,441 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:41,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2023712944, now seen corresponding path program 16 times [2021-05-22 02:09:41,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:41,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805050396] [2021-05-22 02:09:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:41,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805050396] [2021-05-22 02:09:41,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805050396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129626417] [2021-05-22 02:09:41,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:41,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:41,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:41,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:41,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:41,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129626417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:41,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:41,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-05-22 02:09:41,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553831843] [2021-05-22 02:09:41,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:41,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:41,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:41,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:41,556 INFO L87 Difference]: Start difference. First operand 2798 states and 9992 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:41,694 INFO L93 Difference]: Finished difference Result 3396 states and 11614 transitions. [2021-05-22 02:09:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:09:41,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:41,701 INFO L225 Difference]: With dead ends: 3396 [2021-05-22 02:09:41,702 INFO L226 Difference]: Without dead ends: 3345 [2021-05-22 02:09:41,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:09:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-05-22 02:09:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 2812. [2021-05-22 02:09:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 3.55923159018143) internal successors, (10005), 2811 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 10005 transitions. [2021-05-22 02:09:41,771 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 10005 transitions. Word has length 23 [2021-05-22 02:09:41,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:41,772 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 10005 transitions. [2021-05-22 02:09:41,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 10005 transitions. [2021-05-22 02:09:41,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:41,779 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:41,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:41,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-22 02:09:41,993 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:41,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:41,993 INFO L82 PathProgramCache]: Analyzing trace with hash 783282608, now seen corresponding path program 17 times [2021-05-22 02:09:41,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:41,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365469057] [2021-05-22 02:09:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:42,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:42,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365469057] [2021-05-22 02:09:42,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365469057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:42,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765311059] [2021-05-22 02:09:42,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:42,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:42,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:42,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:42,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:42,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765311059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:42,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:42,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-22 02:09:42,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858662890] [2021-05-22 02:09:42,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:09:42,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:42,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:09:42,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:09:42,097 INFO L87 Difference]: Start difference. First operand 2812 states and 10005 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:42,167 INFO L93 Difference]: Finished difference Result 4023 states and 13889 transitions. [2021-05-22 02:09:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:09:42,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:42,178 INFO L225 Difference]: With dead ends: 4023 [2021-05-22 02:09:42,179 INFO L226 Difference]: Without dead ends: 4005 [2021-05-22 02:09:42,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:09:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-05-22 02:09:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3260. [2021-05-22 02:09:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 3.59159251304081) internal successors, (11705), 3259 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 11705 transitions. [2021-05-22 02:09:42,263 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 11705 transitions. Word has length 23 [2021-05-22 02:09:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:42,263 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 11705 transitions. [2021-05-22 02:09:42,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 11705 transitions. [2021-05-22 02:09:42,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:42,270 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:42,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:42,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-22 02:09:42,485 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:42,485 INFO L82 PathProgramCache]: Analyzing trace with hash 530496180, now seen corresponding path program 18 times [2021-05-22 02:09:42,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:42,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251130020] [2021-05-22 02:09:42,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:42,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:42,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251130020] [2021-05-22 02:09:42,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251130020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:42,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011163611] [2021-05-22 02:09:42,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:42,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:09:42,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:42,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:42,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:09:42,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011163611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:42,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:42,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-22 02:09:42,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643876736] [2021-05-22 02:09:42,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:42,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:42,603 INFO L87 Difference]: Start difference. First operand 3260 states and 11705 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:43,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:43,071 INFO L93 Difference]: Finished difference Result 8888 states and 30108 transitions. [2021-05-22 02:09:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:09:43,071 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:43,093 INFO L225 Difference]: With dead ends: 8888 [2021-05-22 02:09:43,093 INFO L226 Difference]: Without dead ends: 8754 [2021-05-22 02:09:43,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:09:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8754 states. [2021-05-22 02:09:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8754 to 5409. [2021-05-22 02:09:43,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5409 states, 5408 states have (on average 3.689164201183432) internal successors, (19951), 5408 states have internal predecessors, (19951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 19951 transitions. [2021-05-22 02:09:43,262 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 19951 transitions. Word has length 23 [2021-05-22 02:09:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:43,262 INFO L482 AbstractCegarLoop]: Abstraction has 5409 states and 19951 transitions. [2021-05-22 02:09:43,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 19951 transitions. [2021-05-22 02:09:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:43,273 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:43,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:43,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-22 02:09:43,496 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:43,496 INFO L82 PathProgramCache]: Analyzing trace with hash 254898436, now seen corresponding path program 19 times [2021-05-22 02:09:43,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:43,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607607726] [2021-05-22 02:09:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:43,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:43,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607607726] [2021-05-22 02:09:43,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607607726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:43,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598560096] [2021-05-22 02:09:43,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:43,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:43,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:43,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598560096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:43,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:43,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-22 02:09:43,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128335602] [2021-05-22 02:09:43,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:09:43,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:43,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:09:43,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:09:43,602 INFO L87 Difference]: Start difference. First operand 5409 states and 19951 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:43,694 INFO L93 Difference]: Finished difference Result 6626 states and 23548 transitions. [2021-05-22 02:09:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:09:43,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:43,709 INFO L225 Difference]: With dead ends: 6626 [2021-05-22 02:09:43,710 INFO L226 Difference]: Without dead ends: 6576 [2021-05-22 02:09:43,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:09:43,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-05-22 02:09:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 5617. [2021-05-22 02:09:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5617 states, 5616 states have (on average 3.6428062678062676) internal successors, (20458), 5616 states have internal predecessors, (20458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 20458 transitions. [2021-05-22 02:09:43,870 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 20458 transitions. Word has length 23 [2021-05-22 02:09:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:43,871 INFO L482 AbstractCegarLoop]: Abstraction has 5617 states and 20458 transitions. [2021-05-22 02:09:43,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 20458 transitions. [2021-05-22 02:09:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:43,883 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:43,883 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:44,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-22 02:09:44,105 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:44,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1159769024, now seen corresponding path program 20 times [2021-05-22 02:09:44,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:44,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364061765] [2021-05-22 02:09:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:44,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:44,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364061765] [2021-05-22 02:09:44,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364061765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:44,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968001193] [2021-05-22 02:09:44,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:44,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:44,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:44,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:44,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:09:44,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968001193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:44,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:44,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-22 02:09:44,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891508823] [2021-05-22 02:09:44,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:44,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:44,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:44,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:44,254 INFO L87 Difference]: Start difference. First operand 5617 states and 20458 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:44,646 INFO L93 Difference]: Finished difference Result 12332 states and 42412 transitions. [2021-05-22 02:09:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:09:44,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:44,667 INFO L225 Difference]: With dead ends: 12332 [2021-05-22 02:09:44,667 INFO L226 Difference]: Without dead ends: 12185 [2021-05-22 02:09:44,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:09:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12185 states. [2021-05-22 02:09:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12185 to 8357. [2021-05-22 02:09:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 3.7277405457156534) internal successors, (31149), 8356 states have internal predecessors, (31149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 31149 transitions. [2021-05-22 02:09:44,922 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 31149 transitions. Word has length 23 [2021-05-22 02:09:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:44,922 INFO L482 AbstractCegarLoop]: Abstraction has 8357 states and 31149 transitions. [2021-05-22 02:09:44,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 31149 transitions. [2021-05-22 02:09:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:09:44,941 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:44,941 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:45,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:45,163 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:45,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:45,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1991076932, now seen corresponding path program 21 times [2021-05-22 02:09:45,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:45,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220637095] [2021-05-22 02:09:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:45,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:45,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220637095] [2021-05-22 02:09:45,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220637095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:45,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891963213] [2021-05-22 02:09:45,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:45,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:09:45,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:45,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:09:45,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:09:45,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891963213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:45,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:45,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-22 02:09:45,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128700714] [2021-05-22 02:09:45,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:09:45,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:45,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:09:45,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:09:45,274 INFO L87 Difference]: Start difference. First operand 8357 states and 31149 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:45,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:45,652 INFO L93 Difference]: Finished difference Result 11103 states and 39610 transitions. [2021-05-22 02:09:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:09:45,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:09:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:45,672 INFO L225 Difference]: With dead ends: 11103 [2021-05-22 02:09:45,672 INFO L226 Difference]: Without dead ends: 10950 [2021-05-22 02:09:45,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:09:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-05-22 02:09:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 8492. [2021-05-22 02:09:45,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8492 states, 8491 states have (on average 3.725120716052291) internal successors, (31630), 8491 states have internal predecessors, (31630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 31630 transitions. [2021-05-22 02:09:46,001 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 31630 transitions. Word has length 23 [2021-05-22 02:09:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:46,001 INFO L482 AbstractCegarLoop]: Abstraction has 8492 states and 31630 transitions. [2021-05-22 02:09:46,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 31630 transitions. [2021-05-22 02:09:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:46,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:46,023 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:46,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:46,246 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:46,246 INFO L82 PathProgramCache]: Analyzing trace with hash -553390134, now seen corresponding path program 22 times [2021-05-22 02:09:46,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:46,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559808225] [2021-05-22 02:09:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:46,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:46,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559808225] [2021-05-22 02:09:46,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559808225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:46,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810435313] [2021-05-22 02:09:46,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:46,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:46,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:46,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:46,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:46,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810435313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:46,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:46,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:46,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743281196] [2021-05-22 02:09:46,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:46,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:46,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:46,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:46,616 INFO L87 Difference]: Start difference. First operand 8492 states and 31630 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:47,023 INFO L93 Difference]: Finished difference Result 8694 states and 32230 transitions. [2021-05-22 02:09:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:09:47,028 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:47,045 INFO L225 Difference]: With dead ends: 8694 [2021-05-22 02:09:47,045 INFO L226 Difference]: Without dead ends: 8679 [2021-05-22 02:09:47,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:09:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8679 states. [2021-05-22 02:09:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8679 to 8558. [2021-05-22 02:09:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8558 states, 8557 states have (on average 3.722098866425149) internal successors, (31850), 8557 states have internal predecessors, (31850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 31850 transitions. [2021-05-22 02:09:47,213 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 31850 transitions. Word has length 27 [2021-05-22 02:09:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:47,213 INFO L482 AbstractCegarLoop]: Abstraction has 8558 states and 31850 transitions. [2021-05-22 02:09:47,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 31850 transitions. [2021-05-22 02:09:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:47,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:47,229 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:47,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:47,433 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash -546769482, now seen corresponding path program 23 times [2021-05-22 02:09:47,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:47,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393849700] [2021-05-22 02:09:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:47,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:47,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393849700] [2021-05-22 02:09:47,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393849700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:47,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046171612] [2021-05-22 02:09:47,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:47,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:09:47,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:47,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:47,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046171612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:47,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:47,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:47,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587098594] [2021-05-22 02:09:47,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:47,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:47,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:47,771 INFO L87 Difference]: Start difference. First operand 8558 states and 31850 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:48,174 INFO L93 Difference]: Finished difference Result 8977 states and 33000 transitions. [2021-05-22 02:09:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:09:48,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:48,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:48,194 INFO L225 Difference]: With dead ends: 8977 [2021-05-22 02:09:48,194 INFO L226 Difference]: Without dead ends: 8896 [2021-05-22 02:09:48,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:09:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2021-05-22 02:09:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8629. [2021-05-22 02:09:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8629 states, 8628 states have (on average 3.7192860454334724) internal successors, (32090), 8628 states have internal predecessors, (32090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8629 states to 8629 states and 32090 transitions. [2021-05-22 02:09:48,336 INFO L78 Accepts]: Start accepts. Automaton has 8629 states and 32090 transitions. Word has length 27 [2021-05-22 02:09:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:48,336 INFO L482 AbstractCegarLoop]: Abstraction has 8629 states and 32090 transitions. [2021-05-22 02:09:48,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 8629 states and 32090 transitions. [2021-05-22 02:09:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:48,351 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:48,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:48,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-22 02:09:48,552 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:48,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1765844602, now seen corresponding path program 24 times [2021-05-22 02:09:48,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:48,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483103876] [2021-05-22 02:09:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:48,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:48,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483103876] [2021-05-22 02:09:48,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483103876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:48,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102819868] [2021-05-22 02:09:48,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:48,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:09:48,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:48,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:48,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102819868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:48,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:48,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:48,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350441544] [2021-05-22 02:09:48,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:48,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:48,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:48,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:48,968 INFO L87 Difference]: Start difference. First operand 8629 states and 32090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:49,224 INFO L93 Difference]: Finished difference Result 9107 states and 33442 transitions. [2021-05-22 02:09:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:09:49,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:49,241 INFO L225 Difference]: With dead ends: 9107 [2021-05-22 02:09:49,241 INFO L226 Difference]: Without dead ends: 9029 [2021-05-22 02:09:49,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:09:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9029 states. [2021-05-22 02:09:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9029 to 8705. [2021-05-22 02:09:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8705 states, 8704 states have (on average 3.7188648897058822) internal successors, (32369), 8704 states have internal predecessors, (32369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 32369 transitions. [2021-05-22 02:09:49,381 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 32369 transitions. Word has length 27 [2021-05-22 02:09:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:49,381 INFO L482 AbstractCegarLoop]: Abstraction has 8705 states and 32369 transitions. [2021-05-22 02:09:49,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 32369 transitions. [2021-05-22 02:09:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:49,394 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:49,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:49,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:49,594 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:49,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1801149938, now seen corresponding path program 25 times [2021-05-22 02:09:49,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:49,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604438249] [2021-05-22 02:09:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:49,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:49,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604438249] [2021-05-22 02:09:49,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604438249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:49,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209317086] [2021-05-22 02:09:49,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:49,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:49,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:49,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209317086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:49,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:49,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:49,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611496363] [2021-05-22 02:09:49,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:49,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:49,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:49,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:49,963 INFO L87 Difference]: Start difference. First operand 8705 states and 32369 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:50,354 INFO L93 Difference]: Finished difference Result 9134 states and 33615 transitions. [2021-05-22 02:09:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:09:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:50,373 INFO L225 Difference]: With dead ends: 9134 [2021-05-22 02:09:50,374 INFO L226 Difference]: Without dead ends: 9104 [2021-05-22 02:09:50,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:09:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9104 states. [2021-05-22 02:09:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9104 to 8799. [2021-05-22 02:09:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8799 states, 8798 states have (on average 3.7176631052511935) internal successors, (32708), 8798 states have internal predecessors, (32708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:50,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8799 states to 8799 states and 32708 transitions. [2021-05-22 02:09:50,516 INFO L78 Accepts]: Start accepts. Automaton has 8799 states and 32708 transitions. Word has length 27 [2021-05-22 02:09:50,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:50,516 INFO L482 AbstractCegarLoop]: Abstraction has 8799 states and 32708 transitions. [2021-05-22 02:09:50,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:50,516 INFO L276 IsEmpty]: Start isEmpty. Operand 8799 states and 32708 transitions. [2021-05-22 02:09:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:50,528 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:50,528 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:50,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-22 02:09:50,728 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:50,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:50,729 INFO L82 PathProgramCache]: Analyzing trace with hash -181203274, now seen corresponding path program 26 times [2021-05-22 02:09:50,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:50,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113044539] [2021-05-22 02:09:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:50,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113044539] [2021-05-22 02:09:50,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113044539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926634216] [2021-05-22 02:09:50,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:50,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:50,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:50,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:51,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926634216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:51,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:51,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:51,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364824659] [2021-05-22 02:09:51,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:51,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:51,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:51,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:51,046 INFO L87 Difference]: Start difference. First operand 8799 states and 32708 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:51,310 INFO L93 Difference]: Finished difference Result 9600 states and 35001 transitions. [2021-05-22 02:09:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:09:51,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:51,328 INFO L225 Difference]: With dead ends: 9600 [2021-05-22 02:09:51,328 INFO L226 Difference]: Without dead ends: 9541 [2021-05-22 02:09:51,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:09:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-05-22 02:09:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8909. [2021-05-22 02:09:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8909 states, 8908 states have (on average 3.7182308037718905) internal successors, (33122), 8908 states have internal predecessors, (33122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8909 states to 8909 states and 33122 transitions. [2021-05-22 02:09:51,517 INFO L78 Accepts]: Start accepts. Automaton has 8909 states and 33122 transitions. Word has length 27 [2021-05-22 02:09:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:51,517 INFO L482 AbstractCegarLoop]: Abstraction has 8909 states and 33122 transitions. [2021-05-22 02:09:51,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:51,518 INFO L276 IsEmpty]: Start isEmpty. Operand 8909 states and 33122 transitions. [2021-05-22 02:09:51,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:51,531 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:51,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:51,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:51,731 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:51,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1438887350, now seen corresponding path program 27 times [2021-05-22 02:09:51,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:51,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098566926] [2021-05-22 02:09:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:51,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:51,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098566926] [2021-05-22 02:09:51,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098566926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:51,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361209474] [2021-05-22 02:09:51,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:51,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:09:51,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:51,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:52,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361209474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:52,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:52,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:52,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237953309] [2021-05-22 02:09:52,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:52,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:52,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:52,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:52,049 INFO L87 Difference]: Start difference. First operand 8909 states and 33122 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:52,388 INFO L93 Difference]: Finished difference Result 9517 states and 34885 transitions. [2021-05-22 02:09:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:09:52,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:52,405 INFO L225 Difference]: With dead ends: 9517 [2021-05-22 02:09:52,405 INFO L226 Difference]: Without dead ends: 9477 [2021-05-22 02:09:52,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:09:52,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-05-22 02:09:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 9103. [2021-05-22 02:09:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9103 states, 9102 states have (on average 3.707426939134256) internal successors, (33745), 9102 states have internal predecessors, (33745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9103 states to 9103 states and 33745 transitions. [2021-05-22 02:09:52,533 INFO L78 Accepts]: Start accepts. Automaton has 9103 states and 33745 transitions. Word has length 27 [2021-05-22 02:09:52,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:52,533 INFO L482 AbstractCegarLoop]: Abstraction has 9103 states and 33745 transitions. [2021-05-22 02:09:52,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 9103 states and 33745 transitions. [2021-05-22 02:09:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:52,545 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:52,545 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:52,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-22 02:09:52,745 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1060302908, now seen corresponding path program 28 times [2021-05-22 02:09:52,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:52,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891297428] [2021-05-22 02:09:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:52,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:52,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891297428] [2021-05-22 02:09:52,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891297428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:52,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72628209] [2021-05-22 02:09:52,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:52,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:52,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:53,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72628209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:53,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:53,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:53,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580711062] [2021-05-22 02:09:53,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:53,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:53,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:53,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:53,032 INFO L87 Difference]: Start difference. First operand 9103 states and 33745 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:53,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:53,361 INFO L93 Difference]: Finished difference Result 9247 states and 34135 transitions. [2021-05-22 02:09:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:09:53,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:53,379 INFO L225 Difference]: With dead ends: 9247 [2021-05-22 02:09:53,379 INFO L226 Difference]: Without dead ends: 9219 [2021-05-22 02:09:53,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:09:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-05-22 02:09:53,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 9136. [2021-05-22 02:09:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9136 states, 9135 states have (on average 3.7056376573617955) internal successors, (33851), 9135 states have internal predecessors, (33851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9136 states to 9136 states and 33851 transitions. [2021-05-22 02:09:53,536 INFO L78 Accepts]: Start accepts. Automaton has 9136 states and 33851 transitions. Word has length 27 [2021-05-22 02:09:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:53,536 INFO L482 AbstractCegarLoop]: Abstraction has 9136 states and 33851 transitions. [2021-05-22 02:09:53,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 9136 states and 33851 transitions. [2021-05-22 02:09:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:53,553 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:53,553 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:53,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:53,754 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1053682256, now seen corresponding path program 29 times [2021-05-22 02:09:53,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:53,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296784942] [2021-05-22 02:09:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:53,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:53,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296784942] [2021-05-22 02:09:53,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296784942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:53,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994702245] [2021-05-22 02:09:53,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:53,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:09:53,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:53,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:53,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:54,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994702245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:54,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:54,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:54,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500842003] [2021-05-22 02:09:54,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:54,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:54,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:54,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:54,046 INFO L87 Difference]: Start difference. First operand 9136 states and 33851 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:54,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:54,291 INFO L93 Difference]: Finished difference Result 9354 states and 34405 transitions. [2021-05-22 02:09:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:09:54,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:54,309 INFO L225 Difference]: With dead ends: 9354 [2021-05-22 02:09:54,309 INFO L226 Difference]: Without dead ends: 9280 [2021-05-22 02:09:54,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:09:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9280 states. [2021-05-22 02:09:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9280 to 9194. [2021-05-22 02:09:54,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.7022734689437615) internal successors, (34035), 9193 states have internal predecessors, (34035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 34035 transitions. [2021-05-22 02:09:54,494 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 34035 transitions. Word has length 27 [2021-05-22 02:09:54,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:54,494 INFO L482 AbstractCegarLoop]: Abstraction has 9194 states and 34035 transitions. [2021-05-22 02:09:54,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:54,494 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 34035 transitions. [2021-05-22 02:09:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:54,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:54,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:54,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-22 02:09:54,718 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:54,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1258931828, now seen corresponding path program 30 times [2021-05-22 02:09:54,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:54,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251595063] [2021-05-22 02:09:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:54,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:54,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251595063] [2021-05-22 02:09:54,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251595063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:54,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830612127] [2021-05-22 02:09:54,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:54,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:09:54,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:54,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:54,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:54,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830612127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:54,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:54,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:54,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945917293] [2021-05-22 02:09:54,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:54,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:54,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:54,989 INFO L87 Difference]: Start difference. First operand 9194 states and 34035 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:55,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:55,221 INFO L93 Difference]: Finished difference Result 9533 states and 34982 transitions. [2021-05-22 02:09:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:09:55,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:55,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:55,243 INFO L225 Difference]: With dead ends: 9533 [2021-05-22 02:09:55,243 INFO L226 Difference]: Without dead ends: 9420 [2021-05-22 02:09:55,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:09:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2021-05-22 02:09:55,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9274. [2021-05-22 02:09:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 3.6988029763830474) internal successors, (34299), 9273 states have internal predecessors, (34299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 34299 transitions. [2021-05-22 02:09:55,376 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 34299 transitions. Word has length 27 [2021-05-22 02:09:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:55,376 INFO L482 AbstractCegarLoop]: Abstraction has 9274 states and 34299 transitions. [2021-05-22 02:09:55,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 34299 transitions. [2021-05-22 02:09:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:55,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:55,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:55,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-22 02:09:55,609 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash -17021312, now seen corresponding path program 31 times [2021-05-22 02:09:55,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:55,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896264537] [2021-05-22 02:09:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:55,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:55,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896264537] [2021-05-22 02:09:55,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896264537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:55,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386972188] [2021-05-22 02:09:55,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:55,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:55,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:55,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386972188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:55,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:55,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:55,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058067797] [2021-05-22 02:09:55,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:55,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:55,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:55,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:55,867 INFO L87 Difference]: Start difference. First operand 9274 states and 34299 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:56,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:56,200 INFO L93 Difference]: Finished difference Result 9439 states and 34788 transitions. [2021-05-22 02:09:56,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:09:56,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:56,221 INFO L225 Difference]: With dead ends: 9439 [2021-05-22 02:09:56,221 INFO L226 Difference]: Without dead ends: 9424 [2021-05-22 02:09:56,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:09:56,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9424 states. [2021-05-22 02:09:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9424 to 9304. [2021-05-22 02:09:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9304 states, 9303 states have (on average 3.6990218209179835) internal successors, (34412), 9303 states have internal predecessors, (34412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9304 states to 9304 states and 34412 transitions. [2021-05-22 02:09:56,352 INFO L78 Accepts]: Start accepts. Automaton has 9304 states and 34412 transitions. Word has length 27 [2021-05-22 02:09:56,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:56,352 INFO L482 AbstractCegarLoop]: Abstraction has 9304 states and 34412 transitions. [2021-05-22 02:09:56,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:56,352 INFO L276 IsEmpty]: Start isEmpty. Operand 9304 states and 34412 transitions. [2021-05-22 02:09:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:56,365 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:56,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:56,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-22 02:09:56,566 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:56,566 INFO L82 PathProgramCache]: Analyzing trace with hash -533712016, now seen corresponding path program 32 times [2021-05-22 02:09:56,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:56,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465827558] [2021-05-22 02:09:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:56,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:56,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465827558] [2021-05-22 02:09:56,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465827558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:56,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612244518] [2021-05-22 02:09:56,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:56,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:56,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:56,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:56,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612244518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:56,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:56,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:56,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255986607] [2021-05-22 02:09:56,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:56,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:56,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:56,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:56,879 INFO L87 Difference]: Start difference. First operand 9304 states and 34412 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:57,182 INFO L93 Difference]: Finished difference Result 9649 states and 35346 transitions. [2021-05-22 02:09:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:09:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:57,201 INFO L225 Difference]: With dead ends: 9649 [2021-05-22 02:09:57,202 INFO L226 Difference]: Without dead ends: 9561 [2021-05-22 02:09:57,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:09:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9561 states. [2021-05-22 02:09:57,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9561 to 9395. [2021-05-22 02:09:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 3.6943793911007026) internal successors, (34705), 9394 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 34705 transitions. [2021-05-22 02:09:57,334 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 34705 transitions. Word has length 27 [2021-05-22 02:09:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:57,334 INFO L482 AbstractCegarLoop]: Abstraction has 9395 states and 34705 transitions. [2021-05-22 02:09:57,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 34705 transitions. [2021-05-22 02:09:57,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:57,348 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:57,348 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:57,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-22 02:09:57,549 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:57,549 INFO L82 PathProgramCache]: Analyzing trace with hash -339028684, now seen corresponding path program 33 times [2021-05-22 02:09:57,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:57,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51300313] [2021-05-22 02:09:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:57,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:57,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51300313] [2021-05-22 02:09:57,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51300313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:57,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143771317] [2021-05-22 02:09:57,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:57,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:09:57,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:57,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:57,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:57,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143771317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:57,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:57,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:57,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433126437] [2021-05-22 02:09:57,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:57,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:57,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:57,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:57,839 INFO L87 Difference]: Start difference. First operand 9395 states and 34705 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:58,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:58,130 INFO L93 Difference]: Finished difference Result 9931 states and 36232 transitions. [2021-05-22 02:09:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:09:58,130 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:58,154 INFO L225 Difference]: With dead ends: 9931 [2021-05-22 02:09:58,154 INFO L226 Difference]: Without dead ends: 9855 [2021-05-22 02:09:58,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:09:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2021-05-22 02:09:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 9522. [2021-05-22 02:09:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9522 states, 9521 states have (on average 3.6922592164688584) internal successors, (35154), 9521 states have internal predecessors, (35154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9522 states to 9522 states and 35154 transitions. [2021-05-22 02:09:58,299 INFO L78 Accepts]: Start accepts. Automaton has 9522 states and 35154 transitions. Word has length 27 [2021-05-22 02:09:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:58,299 INFO L482 AbstractCegarLoop]: Abstraction has 9522 states and 35154 transitions. [2021-05-22 02:09:58,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states and 35154 transitions. [2021-05-22 02:09:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:58,312 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:58,312 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:58,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:58,513 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1349589500, now seen corresponding path program 34 times [2021-05-22 02:09:58,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:58,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432037079] [2021-05-22 02:09:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:58,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:58,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432037079] [2021-05-22 02:09:58,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432037079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:58,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334566352] [2021-05-22 02:09:58,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:58,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:58,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:58,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:58,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:58,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334566352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:58,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:58,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:58,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979215193] [2021-05-22 02:09:58,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:58,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:58,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:58,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:58,765 INFO L87 Difference]: Start difference. First operand 9522 states and 35154 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:59,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:59,038 INFO L93 Difference]: Finished difference Result 9863 states and 36097 transitions. [2021-05-22 02:09:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:09:59,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:59,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:59,059 INFO L225 Difference]: With dead ends: 9863 [2021-05-22 02:09:59,060 INFO L226 Difference]: Without dead ends: 9764 [2021-05-22 02:09:59,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:09:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9764 states. [2021-05-22 02:09:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9764 to 9594. [2021-05-22 02:09:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9594 states, 9593 states have (on average 3.6910247055144376) internal successors, (35408), 9593 states have internal predecessors, (35408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9594 states to 9594 states and 35408 transitions. [2021-05-22 02:09:59,229 INFO L78 Accepts]: Start accepts. Automaton has 9594 states and 35408 transitions. Word has length 27 [2021-05-22 02:09:59,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:59,229 INFO L482 AbstractCegarLoop]: Abstraction has 9594 states and 35408 transitions. [2021-05-22 02:09:59,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:59,229 INFO L276 IsEmpty]: Start isEmpty. Operand 9594 states and 35408 transitions. [2021-05-22 02:09:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:09:59,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:59,246 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:59,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-22 02:09:59,446 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:59,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:59,446 INFO L82 PathProgramCache]: Analyzing trace with hash 193536128, now seen corresponding path program 35 times [2021-05-22 02:09:59,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:59,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807341065] [2021-05-22 02:09:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:59,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:59,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807341065] [2021-05-22 02:09:59,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807341065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:59,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423789843] [2021-05-22 02:09:59,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:59,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:09:59,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:59,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:09:59,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:59,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423789843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:59,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:59,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:59,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375987004] [2021-05-22 02:09:59,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:59,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:59,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:59,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:59,709 INFO L87 Difference]: Start difference. First operand 9594 states and 35408 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:59,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:59,955 INFO L93 Difference]: Finished difference Result 10085 states and 36794 transitions. [2021-05-22 02:09:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:09:59,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:09:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:59,974 INFO L225 Difference]: With dead ends: 10085 [2021-05-22 02:09:59,974 INFO L226 Difference]: Without dead ends: 10009 [2021-05-22 02:09:59,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:09:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10009 states. [2021-05-22 02:10:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10009 to 9667. [2021-05-22 02:10:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9667 states, 9666 states have (on average 3.6887026691495963) internal successors, (35655), 9666 states have internal predecessors, (35655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9667 states to 9667 states and 35655 transitions. [2021-05-22 02:10:00,139 INFO L78 Accepts]: Start accepts. Automaton has 9667 states and 35655 transitions. Word has length 27 [2021-05-22 02:10:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:00,140 INFO L482 AbstractCegarLoop]: Abstraction has 9667 states and 35655 transitions. [2021-05-22 02:10:00,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 9667 states and 35655 transitions. [2021-05-22 02:10:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:00,153 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:00,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:00,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-22 02:10:00,354 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:00,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:00,354 INFO L82 PathProgramCache]: Analyzing trace with hash -143606020, now seen corresponding path program 36 times [2021-05-22 02:10:00,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:00,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704898108] [2021-05-22 02:10:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:00,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:00,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704898108] [2021-05-22 02:10:00,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704898108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:00,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747534095] [2021-05-22 02:10:00,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:00,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:10:00,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:00,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:00,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:00,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747534095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:00,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:00,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:00,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256220909] [2021-05-22 02:10:00,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:00,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:00,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:00,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:00,604 INFO L87 Difference]: Start difference. First operand 9667 states and 35655 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:00,854 INFO L93 Difference]: Finished difference Result 10306 states and 37504 transitions. [2021-05-22 02:10:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:10:00,854 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:00,878 INFO L225 Difference]: With dead ends: 10306 [2021-05-22 02:10:00,878 INFO L226 Difference]: Without dead ends: 10170 [2021-05-22 02:10:00,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-05-22 02:10:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 9815. [2021-05-22 02:10:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9815 states, 9814 states have (on average 3.68830242510699) internal successors, (36197), 9814 states have internal predecessors, (36197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9815 states to 9815 states and 36197 transitions. [2021-05-22 02:10:01,078 INFO L78 Accepts]: Start accepts. Automaton has 9815 states and 36197 transitions. Word has length 27 [2021-05-22 02:10:01,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:01,078 INFO L482 AbstractCegarLoop]: Abstraction has 9815 states and 36197 transitions. [2021-05-22 02:10:01,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 9815 states and 36197 transitions. [2021-05-22 02:10:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:01,097 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:01,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:01,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:01,320 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:01,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2109020860, now seen corresponding path program 37 times [2021-05-22 02:10:01,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:01,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064107840] [2021-05-22 02:10:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:01,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:01,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064107840] [2021-05-22 02:10:01,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064107840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:01,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014128523] [2021-05-22 02:10:01,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:01,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:01,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:01,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014128523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:01,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:01,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:01,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043308898] [2021-05-22 02:10:01,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:01,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:01,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:01,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:01,582 INFO L87 Difference]: Start difference. First operand 9815 states and 36197 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:01,856 INFO L93 Difference]: Finished difference Result 10112 states and 36984 transitions. [2021-05-22 02:10:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:01,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:01,874 INFO L225 Difference]: With dead ends: 10112 [2021-05-22 02:10:01,874 INFO L226 Difference]: Without dead ends: 10046 [2021-05-22 02:10:01,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2021-05-22 02:10:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 9840. [2021-05-22 02:10:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 3.6888911474743367) internal successors, (36295), 9839 states have internal predecessors, (36295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 36295 transitions. [2021-05-22 02:10:02,011 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 36295 transitions. Word has length 27 [2021-05-22 02:10:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:02,011 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 36295 transitions. [2021-05-22 02:10:02,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 36295 transitions. [2021-05-22 02:10:02,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:02,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:02,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:02,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-22 02:10:02,226 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:02,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1641622004, now seen corresponding path program 38 times [2021-05-22 02:10:02,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:02,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044221167] [2021-05-22 02:10:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:02,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:02,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044221167] [2021-05-22 02:10:02,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044221167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:02,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248361330] [2021-05-22 02:10:02,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:02,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:02,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:02,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248361330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:02,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:02,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:02,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382863585] [2021-05-22 02:10:02,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:02,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:02,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:02,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:02,629 INFO L87 Difference]: Start difference. First operand 9840 states and 36295 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:02,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:02,896 INFO L93 Difference]: Finished difference Result 10217 states and 37368 transitions. [2021-05-22 02:10:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:02,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:02,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:02,922 INFO L225 Difference]: With dead ends: 10217 [2021-05-22 02:10:02,922 INFO L226 Difference]: Without dead ends: 10187 [2021-05-22 02:10:02,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:02,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10187 states. [2021-05-22 02:10:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10187 to 9872. [2021-05-22 02:10:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9872 states, 9871 states have (on average 3.690102319927059) internal successors, (36425), 9871 states have internal predecessors, (36425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9872 states to 9872 states and 36425 transitions. [2021-05-22 02:10:03,128 INFO L78 Accepts]: Start accepts. Automaton has 9872 states and 36425 transitions. Word has length 27 [2021-05-22 02:10:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:03,128 INFO L482 AbstractCegarLoop]: Abstraction has 9872 states and 36425 transitions. [2021-05-22 02:10:03,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 9872 states and 36425 transitions. [2021-05-22 02:10:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:03,147 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:03,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:03,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:03,361 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:03,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:03,361 INFO L82 PathProgramCache]: Analyzing trace with hash -776405308, now seen corresponding path program 39 times [2021-05-22 02:10:03,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:03,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198647107] [2021-05-22 02:10:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:10:03,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:03,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198647107] [2021-05-22 02:10:03,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198647107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:03,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104262602] [2021-05-22 02:10:03,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:03,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:10:03,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:03,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:03,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:03,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104262602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:03,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:03,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:03,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261248757] [2021-05-22 02:10:03,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:03,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:03,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:03,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:03,626 INFO L87 Difference]: Start difference. First operand 9872 states and 36425 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:03,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:03,845 INFO L93 Difference]: Finished difference Result 10876 states and 39384 transitions. [2021-05-22 02:10:03,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:10:03,845 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:03,866 INFO L225 Difference]: With dead ends: 10876 [2021-05-22 02:10:03,867 INFO L226 Difference]: Without dead ends: 10826 [2021-05-22 02:10:03,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:03,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10826 states. [2021-05-22 02:10:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10826 to 10058. [2021-05-22 02:10:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10058 states, 10057 states have (on average 3.69424281594909) internal successors, (37153), 10057 states have internal predecessors, (37153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10058 states to 10058 states and 37153 transitions. [2021-05-22 02:10:04,025 INFO L78 Accepts]: Start accepts. Automaton has 10058 states and 37153 transitions. Word has length 27 [2021-05-22 02:10:04,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:04,026 INFO L482 AbstractCegarLoop]: Abstraction has 10058 states and 37153 transitions. [2021-05-22 02:10:04,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand 10058 states and 37153 transitions. [2021-05-22 02:10:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:04,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:04,041 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:04,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-22 02:10:04,247 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:04,247 INFO L82 PathProgramCache]: Analyzing trace with hash 288417660, now seen corresponding path program 40 times [2021-05-22 02:10:04,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:04,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348977435] [2021-05-22 02:10:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:04,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:04,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348977435] [2021-05-22 02:10:04,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348977435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:04,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614842473] [2021-05-22 02:10:04,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:04,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:04,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:04,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:04,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:04,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614842473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:04,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:04,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:04,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317610138] [2021-05-22 02:10:04,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:04,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:04,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:04,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:04,500 INFO L87 Difference]: Start difference. First operand 10058 states and 37153 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:04,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:04,713 INFO L93 Difference]: Finished difference Result 10555 states and 38575 transitions. [2021-05-22 02:10:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:10:04,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:04,733 INFO L225 Difference]: With dead ends: 10555 [2021-05-22 02:10:04,733 INFO L226 Difference]: Without dead ends: 10525 [2021-05-22 02:10:04,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10525 states. [2021-05-22 02:10:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10525 to 10155. [2021-05-22 02:10:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10155 states, 10154 states have (on average 3.6938152452235573) internal successors, (37507), 10154 states have internal predecessors, (37507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10155 states to 10155 states and 37507 transitions. [2021-05-22 02:10:04,887 INFO L78 Accepts]: Start accepts. Automaton has 10155 states and 37507 transitions. Word has length 27 [2021-05-22 02:10:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:04,888 INFO L482 AbstractCegarLoop]: Abstraction has 10155 states and 37507 transitions. [2021-05-22 02:10:04,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 10155 states and 37507 transitions. [2021-05-22 02:10:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:04,902 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:04,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:05,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-22 02:10:05,103 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1717656832, now seen corresponding path program 41 times [2021-05-22 02:10:05,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:05,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137529903] [2021-05-22 02:10:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:05,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:05,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137529903] [2021-05-22 02:10:05,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137529903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:05,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570733908] [2021-05-22 02:10:05,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:05,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:10:05,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:05,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:05,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570733908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:05,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:05,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:05,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136567986] [2021-05-22 02:10:05,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:05,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:05,357 INFO L87 Difference]: Start difference. First operand 10155 states and 37507 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:05,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:05,560 INFO L93 Difference]: Finished difference Result 10625 states and 38849 transitions. [2021-05-22 02:10:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:10:05,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:05,581 INFO L225 Difference]: With dead ends: 10625 [2021-05-22 02:10:05,581 INFO L226 Difference]: Without dead ends: 10529 [2021-05-22 02:10:05,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10529 states. [2021-05-22 02:10:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10529 to 10297. [2021-05-22 02:10:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10297 states, 10296 states have (on average 3.6916278166278165) internal successors, (38009), 10296 states have internal predecessors, (38009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 38009 transitions. [2021-05-22 02:10:05,792 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 38009 transitions. Word has length 27 [2021-05-22 02:10:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:05,792 INFO L482 AbstractCegarLoop]: Abstraction has 10297 states and 38009 transitions. [2021-05-22 02:10:05,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 38009 transitions. [2021-05-22 02:10:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:05,808 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:05,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:06,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-22 02:10:06,008 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:06,009 INFO L82 PathProgramCache]: Analyzing trace with hash 795869124, now seen corresponding path program 42 times [2021-05-22 02:10:06,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:06,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306781820] [2021-05-22 02:10:06,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:06,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:06,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306781820] [2021-05-22 02:10:06,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306781820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:06,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912393703] [2021-05-22 02:10:06,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:06,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:10:06,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:06,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:06,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912393703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:06,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:06,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:06,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566031656] [2021-05-22 02:10:06,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:06,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:06,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:06,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:06,304 INFO L87 Difference]: Start difference. First operand 10297 states and 38009 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:06,538 INFO L93 Difference]: Finished difference Result 11674 states and 42186 transitions. [2021-05-22 02:10:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:10:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:06,560 INFO L225 Difference]: With dead ends: 11674 [2021-05-22 02:10:06,560 INFO L226 Difference]: Without dead ends: 11640 [2021-05-22 02:10:06,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11640 states. [2021-05-22 02:10:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11640 to 10557. [2021-05-22 02:10:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10557 states, 10556 states have (on average 3.6996968548692686) internal successors, (39054), 10556 states have internal predecessors, (39054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10557 states to 10557 states and 39054 transitions. [2021-05-22 02:10:06,734 INFO L78 Accepts]: Start accepts. Automaton has 10557 states and 39054 transitions. Word has length 27 [2021-05-22 02:10:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:06,734 INFO L482 AbstractCegarLoop]: Abstraction has 10557 states and 39054 transitions. [2021-05-22 02:10:06,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 10557 states and 39054 transitions. [2021-05-22 02:10:06,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:06,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:06,750 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:06,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-05-22 02:10:06,951 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1324830332, now seen corresponding path program 43 times [2021-05-22 02:10:06,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:06,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224708043] [2021-05-22 02:10:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:07,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:07,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224708043] [2021-05-22 02:10:07,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224708043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:07,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319573549] [2021-05-22 02:10:07,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:07,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:07,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:07,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319573549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:07,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:07,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:07,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198944962] [2021-05-22 02:10:07,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:07,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:07,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:07,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:07,229 INFO L87 Difference]: Start difference. First operand 10557 states and 39054 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:07,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:07,452 INFO L93 Difference]: Finished difference Result 10738 states and 39591 transitions. [2021-05-22 02:10:07,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:10:07,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:07,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:07,473 INFO L225 Difference]: With dead ends: 10738 [2021-05-22 02:10:07,473 INFO L226 Difference]: Without dead ends: 10723 [2021-05-22 02:10:07,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:10:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10723 states. [2021-05-22 02:10:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10723 to 10592. [2021-05-22 02:10:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.6990841280332356) internal successors, (39177), 10591 states have internal predecessors, (39177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 39177 transitions. [2021-05-22 02:10:07,637 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 39177 transitions. Word has length 27 [2021-05-22 02:10:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:07,637 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 39177 transitions. [2021-05-22 02:10:07,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 39177 transitions. [2021-05-22 02:10:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:07,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:07,653 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:07,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:07,853 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1318209680, now seen corresponding path program 44 times [2021-05-22 02:10:07,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:07,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475423601] [2021-05-22 02:10:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:07,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:07,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475423601] [2021-05-22 02:10:07,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475423601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:07,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718243654] [2021-05-22 02:10:07,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:07,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:07,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:07,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:07,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:08,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718243654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:08,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:08,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:08,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099971014] [2021-05-22 02:10:08,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:08,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:08,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:08,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:08,109 INFO L87 Difference]: Start difference. First operand 10592 states and 39177 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:08,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:08,362 INFO L93 Difference]: Finished difference Result 11042 states and 40414 transitions. [2021-05-22 02:10:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:08,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:08,384 INFO L225 Difference]: With dead ends: 11042 [2021-05-22 02:10:08,384 INFO L226 Difference]: Without dead ends: 10965 [2021-05-22 02:10:08,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10965 states. [2021-05-22 02:10:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10965 to 10686. [2021-05-22 02:10:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10686 states, 10685 states have (on average 3.6966775854000935) internal successors, (39499), 10685 states have internal predecessors, (39499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10686 states to 10686 states and 39499 transitions. [2021-05-22 02:10:08,558 INFO L78 Accepts]: Start accepts. Automaton has 10686 states and 39499 transitions. Word has length 27 [2021-05-22 02:10:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:08,558 INFO L482 AbstractCegarLoop]: Abstraction has 10686 states and 39499 transitions. [2021-05-22 02:10:08,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 10686 states and 39499 transitions. [2021-05-22 02:10:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:08,574 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:08,574 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:08,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-22 02:10:08,775 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:08,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:08,775 INFO L82 PathProgramCache]: Analyzing trace with hash 994404404, now seen corresponding path program 45 times [2021-05-22 02:10:08,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:08,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275739837] [2021-05-22 02:10:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:08,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:08,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275739837] [2021-05-22 02:10:08,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275739837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:08,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20646141] [2021-05-22 02:10:08,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:08,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:10:08,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:08,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:08,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:09,133 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-05-22 02:10:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:09,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20646141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:09,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:09,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:09,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813293357] [2021-05-22 02:10:09,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:09,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:09,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:09,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:09,197 INFO L87 Difference]: Start difference. First operand 10686 states and 39499 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:09,442 INFO L93 Difference]: Finished difference Result 11185 states and 40920 transitions. [2021-05-22 02:10:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:09,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:09,463 INFO L225 Difference]: With dead ends: 11185 [2021-05-22 02:10:09,463 INFO L226 Difference]: Without dead ends: 11145 [2021-05-22 02:10:09,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11145 states. [2021-05-22 02:10:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11145 to 10743. [2021-05-22 02:10:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10743 states, 10742 states have (on average 3.6983801899087694) internal successors, (39728), 10742 states have internal predecessors, (39728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10743 states to 10743 states and 39728 transitions. [2021-05-22 02:10:09,635 INFO L78 Accepts]: Start accepts. Automaton has 10743 states and 39728 transitions. Word has length 27 [2021-05-22 02:10:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:09,636 INFO L482 AbstractCegarLoop]: Abstraction has 10743 states and 39728 transitions. [2021-05-22 02:10:09,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 10743 states and 39728 transitions. [2021-05-22 02:10:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:09,651 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:09,651 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:09,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:09,851 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash -281548736, now seen corresponding path program 46 times [2021-05-22 02:10:09,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:09,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848427030] [2021-05-22 02:10:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:09,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:09,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848427030] [2021-05-22 02:10:09,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848427030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337898724] [2021-05-22 02:10:09,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:09,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:09,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:09,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:09,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:10,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337898724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:10,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:10,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:10,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714753598] [2021-05-22 02:10:10,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:10,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:10,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:10,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:10,105 INFO L87 Difference]: Start difference. First operand 10743 states and 39728 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:10,414 INFO L93 Difference]: Finished difference Result 10899 states and 40153 transitions. [2021-05-22 02:10:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:10:10,414 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:10,434 INFO L225 Difference]: With dead ends: 10899 [2021-05-22 02:10:10,434 INFO L226 Difference]: Without dead ends: 10871 [2021-05-22 02:10:10,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 215.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:10:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2021-05-22 02:10:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 10760. [2021-05-22 02:10:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10760 states, 10759 states have (on average 3.698299098429222) internal successors, (39790), 10759 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10760 states to 10760 states and 39790 transitions. [2021-05-22 02:10:10,601 INFO L78 Accepts]: Start accepts. Automaton has 10760 states and 39790 transitions. Word has length 27 [2021-05-22 02:10:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:10,602 INFO L482 AbstractCegarLoop]: Abstraction has 10760 states and 39790 transitions. [2021-05-22 02:10:10,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 10760 states and 39790 transitions. [2021-05-22 02:10:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:10,618 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:10,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:10,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-22 02:10:10,819 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:10,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:10,819 INFO L82 PathProgramCache]: Analyzing trace with hash -798239440, now seen corresponding path program 47 times [2021-05-22 02:10:10,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:10,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991102198] [2021-05-22 02:10:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:10,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:10,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991102198] [2021-05-22 02:10:10,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991102198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:10,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651487011] [2021-05-22 02:10:10,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:10,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:10:10,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:10,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:11,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651487011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:11,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:11,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:11,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555861978] [2021-05-22 02:10:11,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:11,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:11,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:11,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:11,085 INFO L87 Difference]: Start difference. First operand 10760 states and 39790 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:11,302 INFO L93 Difference]: Finished difference Result 11018 states and 40428 transitions. [2021-05-22 02:10:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:11,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:11,325 INFO L225 Difference]: With dead ends: 11018 [2021-05-22 02:10:11,325 INFO L226 Difference]: Without dead ends: 10908 [2021-05-22 02:10:11,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10908 states. [2021-05-22 02:10:11,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10908 to 10812. [2021-05-22 02:10:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10812 states, 10811 states have (on average 3.696790306169642) internal successors, (39966), 10811 states have internal predecessors, (39966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10812 states to 10812 states and 39966 transitions. [2021-05-22 02:10:11,493 INFO L78 Accepts]: Start accepts. Automaton has 10812 states and 39966 transitions. Word has length 27 [2021-05-22 02:10:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:11,493 INFO L482 AbstractCegarLoop]: Abstraction has 10812 states and 39966 transitions. [2021-05-22 02:10:11,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 10812 states and 39966 transitions. [2021-05-22 02:10:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:11,509 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:11,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:11,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-22 02:10:11,710 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:11,710 INFO L82 PathProgramCache]: Analyzing trace with hash -603556108, now seen corresponding path program 48 times [2021-05-22 02:10:11,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:11,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091523256] [2021-05-22 02:10:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:11,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:11,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091523256] [2021-05-22 02:10:11,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091523256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:11,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949442145] [2021-05-22 02:10:11,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:11,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:10:11,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:11,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:11,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:11,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949442145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:11,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:11,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:11,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722789331] [2021-05-22 02:10:11,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:11,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:11,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:11,985 INFO L87 Difference]: Start difference. First operand 10812 states and 39966 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:12,235 INFO L93 Difference]: Finished difference Result 11294 states and 41303 transitions. [2021-05-22 02:10:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:12,256 INFO L225 Difference]: With dead ends: 11294 [2021-05-22 02:10:12,256 INFO L226 Difference]: Without dead ends: 11195 [2021-05-22 02:10:12,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2021-05-22 02:10:12,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 10917. [2021-05-22 02:10:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10917 states, 10916 states have (on average 3.6943019421033347) internal successors, (40327), 10916 states have internal predecessors, (40327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10917 states to 10917 states and 40327 transitions. [2021-05-22 02:10:12,499 INFO L78 Accepts]: Start accepts. Automaton has 10917 states and 40327 transitions. Word has length 27 [2021-05-22 02:10:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:12,500 INFO L482 AbstractCegarLoop]: Abstraction has 10917 states and 40327 transitions. [2021-05-22 02:10:12,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 10917 states and 40327 transitions. [2021-05-22 02:10:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:12,516 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:12,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:12,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:12,718 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1085062076, now seen corresponding path program 49 times [2021-05-22 02:10:12,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:12,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819031552] [2021-05-22 02:10:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:10:12,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:12,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819031552] [2021-05-22 02:10:12,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819031552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:12,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19692826] [2021-05-22 02:10:12,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:12,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:12,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:12,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19692826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:12,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:12,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:12,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044243020] [2021-05-22 02:10:12,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:12,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:12,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:12,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:12,995 INFO L87 Difference]: Start difference. First operand 10917 states and 40327 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:13,267 INFO L93 Difference]: Finished difference Result 11367 states and 41606 transitions. [2021-05-22 02:10:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:13,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:13,291 INFO L225 Difference]: With dead ends: 11367 [2021-05-22 02:10:13,291 INFO L226 Difference]: Without dead ends: 11337 [2021-05-22 02:10:13,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2021-05-22 02:10:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 10979. [2021-05-22 02:10:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10979 states, 10978 states have (on average 3.69484423392239) internal successors, (40562), 10978 states have internal predecessors, (40562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 40562 transitions. [2021-05-22 02:10:13,495 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 40562 transitions. Word has length 27 [2021-05-22 02:10:13,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:13,495 INFO L482 AbstractCegarLoop]: Abstraction has 10979 states and 40562 transitions. [2021-05-22 02:10:13,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 40562 transitions. [2021-05-22 02:10:13,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:13,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:13,513 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:13,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-22 02:10:13,714 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:13,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:13,714 INFO L82 PathProgramCache]: Analyzing trace with hash -70991296, now seen corresponding path program 50 times [2021-05-22 02:10:13,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:13,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708184923] [2021-05-22 02:10:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:10:13,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:13,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708184923] [2021-05-22 02:10:13,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708184923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:13,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268741238] [2021-05-22 02:10:13,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:13,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:13,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:13,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:13,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:14,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268741238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:14,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:14,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:14,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063562630] [2021-05-22 02:10:14,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:14,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:14,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:14,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:14,002 INFO L87 Difference]: Start difference. First operand 10979 states and 40562 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:14,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:14,302 INFO L93 Difference]: Finished difference Result 11407 states and 41736 transitions. [2021-05-22 02:10:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:14,302 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:14,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:14,334 INFO L225 Difference]: With dead ends: 11407 [2021-05-22 02:10:14,334 INFO L226 Difference]: Without dead ends: 11315 [2021-05-22 02:10:14,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11315 states. [2021-05-22 02:10:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11315 to 11054. [2021-05-22 02:10:14,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11054 states, 11053 states have (on average 3.694743508549715) internal successors, (40838), 11053 states have internal predecessors, (40838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11054 states to 11054 states and 40838 transitions. [2021-05-22 02:10:14,611 INFO L78 Accepts]: Start accepts. Automaton has 11054 states and 40838 transitions. Word has length 27 [2021-05-22 02:10:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:14,611 INFO L482 AbstractCegarLoop]: Abstraction has 11054 states and 40838 transitions. [2021-05-22 02:10:14,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 11054 states and 40838 transitions. [2021-05-22 02:10:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:14,628 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:14,628 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:14,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-22 02:10:14,828 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash 993593664, now seen corresponding path program 51 times [2021-05-22 02:10:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:14,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983968655] [2021-05-22 02:10:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:14,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:14,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983968655] [2021-05-22 02:10:14,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983968655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:14,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257914406] [2021-05-22 02:10:14,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:14,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:10:14,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:14,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:15,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257914406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:15,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:15,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:15,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005527605] [2021-05-22 02:10:15,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:15,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:15,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:15,118 INFO L87 Difference]: Start difference. First operand 11054 states and 40838 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:15,387 INFO L93 Difference]: Finished difference Result 11235 states and 41375 transitions. [2021-05-22 02:10:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:10:15,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:15,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:15,407 INFO L225 Difference]: With dead ends: 11235 [2021-05-22 02:10:15,407 INFO L226 Difference]: Without dead ends: 11220 [2021-05-22 02:10:15,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11220 states. [2021-05-22 02:10:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11220 to 11078. [2021-05-22 02:10:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11078 states, 11077 states have (on average 3.6932382414011014) internal successors, (40910), 11077 states have internal predecessors, (40910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11078 states to 11078 states and 40910 transitions. [2021-05-22 02:10:15,566 INFO L78 Accepts]: Start accepts. Automaton has 11078 states and 40910 transitions. Word has length 27 [2021-05-22 02:10:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:15,567 INFO L482 AbstractCegarLoop]: Abstraction has 11078 states and 40910 transitions. [2021-05-22 02:10:15,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 11078 states and 40910 transitions. [2021-05-22 02:10:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:15,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:15,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:15,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-22 02:10:15,783 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:15,783 INFO L82 PathProgramCache]: Analyzing trace with hash 476902960, now seen corresponding path program 52 times [2021-05-22 02:10:15,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:15,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721656273] [2021-05-22 02:10:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:15,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:15,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721656273] [2021-05-22 02:10:15,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721656273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:15,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942281630] [2021-05-22 02:10:15,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:15,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:15,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:15,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:16,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942281630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:16,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:16,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:16,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958295559] [2021-05-22 02:10:16,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:16,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:16,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:16,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:16,045 INFO L87 Difference]: Start difference. First operand 11078 states and 40910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:16,323 INFO L93 Difference]: Finished difference Result 11379 states and 41715 transitions. [2021-05-22 02:10:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:16,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:16,345 INFO L225 Difference]: With dead ends: 11379 [2021-05-22 02:10:16,346 INFO L226 Difference]: Without dead ends: 11313 [2021-05-22 02:10:16,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2021-05-22 02:10:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11126. [2021-05-22 02:10:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11126 states, 11125 states have (on average 3.6934831460674156) internal successors, (41090), 11125 states have internal predecessors, (41090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11126 states to 11126 states and 41090 transitions. [2021-05-22 02:10:16,530 INFO L78 Accepts]: Start accepts. Automaton has 11126 states and 41090 transitions. Word has length 27 [2021-05-22 02:10:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:16,530 INFO L482 AbstractCegarLoop]: Abstraction has 11126 states and 41090 transitions. [2021-05-22 02:10:16,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:16,531 INFO L276 IsEmpty]: Start isEmpty. Operand 11126 states and 41090 transitions. [2021-05-22 02:10:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:16,547 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:16,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:16,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:16,748 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:16,748 INFO L82 PathProgramCache]: Analyzing trace with hash 671586292, now seen corresponding path program 53 times [2021-05-22 02:10:16,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:16,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520157789] [2021-05-22 02:10:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:16,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:16,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520157789] [2021-05-22 02:10:16,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520157789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:16,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956825723] [2021-05-22 02:10:16,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:16,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:10:16,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:16,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:16,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:17,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956825723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:17,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:17,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:17,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555287610] [2021-05-22 02:10:17,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:17,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:17,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:17,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:17,039 INFO L87 Difference]: Start difference. First operand 11126 states and 41090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:17,388 INFO L93 Difference]: Finished difference Result 11510 states and 42198 transitions. [2021-05-22 02:10:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:17,410 INFO L225 Difference]: With dead ends: 11510 [2021-05-22 02:10:17,410 INFO L226 Difference]: Without dead ends: 11480 [2021-05-22 02:10:17,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11480 states. [2021-05-22 02:10:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11480 to 11156. [2021-05-22 02:10:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 3.696100403406544) internal successors, (41230), 11155 states have internal predecessors, (41230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 41230 transitions. [2021-05-22 02:10:17,589 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 41230 transitions. Word has length 27 [2021-05-22 02:10:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:17,590 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 41230 transitions. [2021-05-22 02:10:17,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:17,590 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 41230 transitions. [2021-05-22 02:10:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:17,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:17,606 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:17,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:17,807 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:17,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:17,807 INFO L82 PathProgramCache]: Analyzing trace with hash 941151852, now seen corresponding path program 54 times [2021-05-22 02:10:17,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:17,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844097240] [2021-05-22 02:10:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:17,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:17,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844097240] [2021-05-22 02:10:17,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844097240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:17,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637785182] [2021-05-22 02:10:17,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:17,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:10:17,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:17,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:17,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:18,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637785182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:18,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:18,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:18,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451803717] [2021-05-22 02:10:18,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:18,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:18,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:18,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:18,042 INFO L87 Difference]: Start difference. First operand 11156 states and 41230 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:18,316 INFO L93 Difference]: Finished difference Result 11580 states and 42454 transitions. [2021-05-22 02:10:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:18,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:18,339 INFO L225 Difference]: With dead ends: 11580 [2021-05-22 02:10:18,339 INFO L226 Difference]: Without dead ends: 11550 [2021-05-22 02:10:18,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11550 states. [2021-05-22 02:10:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11550 to 11232. [2021-05-22 02:10:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 3.6960199447956548) internal successors, (41510), 11231 states have internal predecessors, (41510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 41510 transitions. [2021-05-22 02:10:18,526 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 41510 transitions. Word has length 27 [2021-05-22 02:10:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:18,526 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 41510 transitions. [2021-05-22 02:10:18,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 41510 transitions. [2021-05-22 02:10:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:18,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:18,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:18,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:18,745 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:18,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1135835184, now seen corresponding path program 55 times [2021-05-22 02:10:18,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:18,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052324170] [2021-05-22 02:10:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:18,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:18,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052324170] [2021-05-22 02:10:18,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052324170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:18,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773260384] [2021-05-22 02:10:18,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:18,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:18,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:19,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773260384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:19,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:19,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:19,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462634172] [2021-05-22 02:10:19,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:19,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:19,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:19,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:19,022 INFO L87 Difference]: Start difference. First operand 11232 states and 41510 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:19,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:19,294 INFO L93 Difference]: Finished difference Result 11545 states and 42403 transitions. [2021-05-22 02:10:19,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:19,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:19,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:19,316 INFO L225 Difference]: With dead ends: 11545 [2021-05-22 02:10:19,316 INFO L226 Difference]: Without dead ends: 11507 [2021-05-22 02:10:19,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2021-05-22 02:10:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 11272. [2021-05-22 02:10:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.6969213024576346) internal successors, (41668), 11271 states have internal predecessors, (41668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 41668 transitions. [2021-05-22 02:10:19,496 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 41668 transitions. Word has length 27 [2021-05-22 02:10:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:19,496 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 41668 transitions. [2021-05-22 02:10:19,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:19,496 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 41668 transitions. [2021-05-22 02:10:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:19,514 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:19,514 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:19,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:19,714 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1936586544, now seen corresponding path program 56 times [2021-05-22 02:10:19,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:19,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28082248] [2021-05-22 02:10:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:19,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:19,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28082248] [2021-05-22 02:10:19,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28082248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:19,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776455983] [2021-05-22 02:10:19,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:19,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:19,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:19,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:19,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:19,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776455983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:19,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:19,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:19,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21767781] [2021-05-22 02:10:19,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:19,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:19,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:19,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:19,964 INFO L87 Difference]: Start difference. First operand 11272 states and 41668 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:20,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:20,247 INFO L93 Difference]: Finished difference Result 11437 states and 42157 transitions. [2021-05-22 02:10:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:10:20,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:20,270 INFO L225 Difference]: With dead ends: 11437 [2021-05-22 02:10:20,271 INFO L226 Difference]: Without dead ends: 11422 [2021-05-22 02:10:20,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11422 states. [2021-05-22 02:10:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11422 to 11302. [2021-05-22 02:10:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11302 states, 11301 states have (on average 3.6956021591009645) internal successors, (41764), 11301 states have internal predecessors, (41764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11302 states to 11302 states and 41764 transitions. [2021-05-22 02:10:20,448 INFO L78 Accepts]: Start accepts. Automaton has 11302 states and 41764 transitions. Word has length 27 [2021-05-22 02:10:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:20,448 INFO L482 AbstractCegarLoop]: Abstraction has 11302 states and 41764 transitions. [2021-05-22 02:10:20,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 11302 states and 41764 transitions. [2021-05-22 02:10:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:20,466 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:20,466 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:20,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-22 02:10:20,667 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:20,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1960365508, now seen corresponding path program 57 times [2021-05-22 02:10:20,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:20,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092927868] [2021-05-22 02:10:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:20,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:20,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092927868] [2021-05-22 02:10:20,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092927868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:20,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598754616] [2021-05-22 02:10:20,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:20,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:10:20,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:20,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:20,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598754616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:20,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:20,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:20,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14330984] [2021-05-22 02:10:20,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:20,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:20,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:20,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:20,897 INFO L87 Difference]: Start difference. First operand 11302 states and 41764 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:21,095 INFO L93 Difference]: Finished difference Result 11677 states and 42772 transitions. [2021-05-22 02:10:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:21,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:21,118 INFO L225 Difference]: With dead ends: 11677 [2021-05-22 02:10:21,118 INFO L226 Difference]: Without dead ends: 11625 [2021-05-22 02:10:21,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11625 states. [2021-05-22 02:10:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11625 to 11308. [2021-05-22 02:10:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11308 states, 11307 states have (on average 3.6952330414787298) internal successors, (41782), 11307 states have internal predecessors, (41782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11308 states to 11308 states and 41782 transitions. [2021-05-22 02:10:21,309 INFO L78 Accepts]: Start accepts. Automaton has 11308 states and 41782 transitions. Word has length 27 [2021-05-22 02:10:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:21,309 INFO L482 AbstractCegarLoop]: Abstraction has 11308 states and 41782 transitions. [2021-05-22 02:10:21,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 11308 states and 41782 transitions. [2021-05-22 02:10:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:21,330 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:21,330 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:21,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:21,531 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:21,531 INFO L82 PathProgramCache]: Analyzing trace with hash 352248576, now seen corresponding path program 58 times [2021-05-22 02:10:21,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:21,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957748639] [2021-05-22 02:10:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:21,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:21,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957748639] [2021-05-22 02:10:21,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957748639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:21,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127313969] [2021-05-22 02:10:21,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:21,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:21,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:21,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:21,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127313969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:21,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:21,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:21,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825619099] [2021-05-22 02:10:21,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:21,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:21,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:21,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:21,877 INFO L87 Difference]: Start difference. First operand 11308 states and 41782 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:22,067 INFO L93 Difference]: Finished difference Result 11704 states and 42906 transitions. [2021-05-22 02:10:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:22,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:22,093 INFO L225 Difference]: With dead ends: 11704 [2021-05-22 02:10:22,093 INFO L226 Difference]: Without dead ends: 11674 [2021-05-22 02:10:22,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:22,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2021-05-22 02:10:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 11310. [2021-05-22 02:10:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11310 states, 11309 states have (on average 3.695463789901848) internal successors, (41792), 11309 states have internal predecessors, (41792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11310 states to 11310 states and 41792 transitions. [2021-05-22 02:10:22,283 INFO L78 Accepts]: Start accepts. Automaton has 11310 states and 41792 transitions. Word has length 27 [2021-05-22 02:10:22,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:22,284 INFO L482 AbstractCegarLoop]: Abstraction has 11310 states and 41792 transitions. [2021-05-22 02:10:22,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:22,284 INFO L276 IsEmpty]: Start isEmpty. Operand 11310 states and 41792 transitions. [2021-05-22 02:10:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:22,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:22,301 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:22,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-22 02:10:22,501 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash -531126336, now seen corresponding path program 59 times [2021-05-22 02:10:22,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:22,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114816734] [2021-05-22 02:10:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:22,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:22,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114816734] [2021-05-22 02:10:22,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114816734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:22,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654305757] [2021-05-22 02:10:22,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:22,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:10:22,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:22,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:22,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:22,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654305757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:22,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:22,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:22,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863809065] [2021-05-22 02:10:22,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:22,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:22,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:22,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:22,742 INFO L87 Difference]: Start difference. First operand 11310 states and 41792 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:22,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:22,954 INFO L93 Difference]: Finished difference Result 11586 states and 42494 transitions. [2021-05-22 02:10:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:22,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:22,975 INFO L225 Difference]: With dead ends: 11586 [2021-05-22 02:10:22,975 INFO L226 Difference]: Without dead ends: 11512 [2021-05-22 02:10:22,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:22,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11512 states. [2021-05-22 02:10:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11512 to 11372. [2021-05-22 02:10:23,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11372 states, 11371 states have (on average 3.692639169817958) internal successors, (41989), 11371 states have internal predecessors, (41989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:23,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 41989 transitions. [2021-05-22 02:10:23,156 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 41989 transitions. Word has length 27 [2021-05-22 02:10:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:23,156 INFO L482 AbstractCegarLoop]: Abstraction has 11372 states and 41989 transitions. [2021-05-22 02:10:23,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 41989 transitions. [2021-05-22 02:10:23,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:23,173 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:23,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:23,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:23,377 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:23,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1957542588, now seen corresponding path program 60 times [2021-05-22 02:10:23,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:23,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089539925] [2021-05-22 02:10:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:10:23,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:23,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089539925] [2021-05-22 02:10:23,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089539925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:23,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772851764] [2021-05-22 02:10:23,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:23,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:10:23,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:23,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:23,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772851764] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:23,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:23,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:23,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933521163] [2021-05-22 02:10:23,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:23,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:23,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:23,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:23,628 INFO L87 Difference]: Start difference. First operand 11372 states and 41989 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:23,878 INFO L93 Difference]: Finished difference Result 11723 states and 42964 transitions. [2021-05-22 02:10:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:23,900 INFO L225 Difference]: With dead ends: 11723 [2021-05-22 02:10:23,900 INFO L226 Difference]: Without dead ends: 11685 [2021-05-22 02:10:23,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11685 states. [2021-05-22 02:10:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11685 to 11411. [2021-05-22 02:10:24,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11411 states, 11410 states have (on average 3.692900964066608) internal successors, (42136), 11410 states have internal predecessors, (42136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11411 states to 11411 states and 42136 transitions. [2021-05-22 02:10:24,074 INFO L78 Accepts]: Start accepts. Automaton has 11411 states and 42136 transitions. Word has length 27 [2021-05-22 02:10:24,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:24,074 INFO L482 AbstractCegarLoop]: Abstraction has 11411 states and 42136 transitions. [2021-05-22 02:10:24,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 11411 states and 42136 transitions. [2021-05-22 02:10:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:24,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:24,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:24,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-22 02:10:24,290 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:24,290 INFO L82 PathProgramCache]: Analyzing trace with hash -889299460, now seen corresponding path program 61 times [2021-05-22 02:10:24,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:24,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827129544] [2021-05-22 02:10:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:24,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:24,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827129544] [2021-05-22 02:10:24,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827129544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:24,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705414592] [2021-05-22 02:10:24,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:24,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:24,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:24,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705414592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:24,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:24,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:24,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829559021] [2021-05-22 02:10:24,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:24,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:24,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:24,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:24,518 INFO L87 Difference]: Start difference. First operand 11411 states and 42136 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:24,758 INFO L93 Difference]: Finished difference Result 11793 states and 43179 transitions. [2021-05-22 02:10:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:24,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:24,782 INFO L225 Difference]: With dead ends: 11793 [2021-05-22 02:10:24,782 INFO L226 Difference]: Without dead ends: 11741 [2021-05-22 02:10:24,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:24,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11741 states. [2021-05-22 02:10:24,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11741 to 11475. [2021-05-22 02:10:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11475 states, 11474 states have (on average 3.6911277671256753) internal successors, (42352), 11474 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11475 states to 11475 states and 42352 transitions. [2021-05-22 02:10:24,971 INFO L78 Accepts]: Start accepts. Automaton has 11475 states and 42352 transitions. Word has length 27 [2021-05-22 02:10:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:24,971 INFO L482 AbstractCegarLoop]: Abstraction has 11475 states and 42352 transitions. [2021-05-22 02:10:24,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 11475 states and 42352 transitions. [2021-05-22 02:10:24,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:24,988 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:24,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:25,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:25,188 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash -421900604, now seen corresponding path program 62 times [2021-05-22 02:10:25,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:25,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216399683] [2021-05-22 02:10:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:25,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:25,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216399683] [2021-05-22 02:10:25,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216399683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:25,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675194091] [2021-05-22 02:10:25,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:25,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:25,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:25,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:25,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:25,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675194091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:25,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:25,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:25,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757961550] [2021-05-22 02:10:25,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:25,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:25,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:25,436 INFO L87 Difference]: Start difference. First operand 11475 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:25,623 INFO L93 Difference]: Finished difference Result 11715 states and 42996 transitions. [2021-05-22 02:10:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:25,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:25,646 INFO L225 Difference]: With dead ends: 11715 [2021-05-22 02:10:25,647 INFO L226 Difference]: Without dead ends: 11659 [2021-05-22 02:10:25,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11659 states. [2021-05-22 02:10:25,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11659 to 11503. [2021-05-22 02:10:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11503 states, 11502 states have (on average 3.691531907494349) internal successors, (42460), 11502 states have internal predecessors, (42460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 42460 transitions. [2021-05-22 02:10:25,867 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 42460 transitions. Word has length 27 [2021-05-22 02:10:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:25,867 INFO L482 AbstractCegarLoop]: Abstraction has 11503 states and 42460 transitions. [2021-05-22 02:10:25,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 42460 transitions. [2021-05-22 02:10:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:25,884 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:25,884 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:26,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:26,085 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:26,085 INFO L82 PathProgramCache]: Analyzing trace with hash 85705924, now seen corresponding path program 63 times [2021-05-22 02:10:26,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:26,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828692337] [2021-05-22 02:10:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:26,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:26,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828692337] [2021-05-22 02:10:26,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828692337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:26,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791234813] [2021-05-22 02:10:26,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:26,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:10:26,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:26,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:26,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:26,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791234813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:26,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:26,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:26,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093712493] [2021-05-22 02:10:26,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:26,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:26,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:26,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:26,344 INFO L87 Difference]: Start difference. First operand 11503 states and 42460 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:26,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:26,564 INFO L93 Difference]: Finished difference Result 11675 states and 42930 transitions. [2021-05-22 02:10:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:10:26,565 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:26,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:26,586 INFO L225 Difference]: With dead ends: 11675 [2021-05-22 02:10:26,587 INFO L226 Difference]: Without dead ends: 11649 [2021-05-22 02:10:26,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:10:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11649 states. [2021-05-22 02:10:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11649 to 11510. [2021-05-22 02:10:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11510 states, 11509 states have (on average 3.6920670779390043) internal successors, (42492), 11509 states have internal predecessors, (42492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11510 states to 11510 states and 42492 transitions. [2021-05-22 02:10:26,763 INFO L78 Accepts]: Start accepts. Automaton has 11510 states and 42492 transitions. Word has length 27 [2021-05-22 02:10:26,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:26,763 INFO L482 AbstractCegarLoop]: Abstraction has 11510 states and 42492 transitions. [2021-05-22 02:10:26,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:26,763 INFO L276 IsEmpty]: Start isEmpty. Operand 11510 states and 42492 transitions. [2021-05-22 02:10:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:26,780 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:26,780 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:26,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-05-22 02:10:26,981 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1402020932, now seen corresponding path program 64 times [2021-05-22 02:10:26,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:26,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577739933] [2021-05-22 02:10:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:27,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:27,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577739933] [2021-05-22 02:10:27,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577739933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:27,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318195275] [2021-05-22 02:10:27,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:27,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:27,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:27,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:27,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:27,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318195275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:27,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:27,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:27,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721401680] [2021-05-22 02:10:27,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:27,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:27,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:27,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:27,249 INFO L87 Difference]: Start difference. First operand 11510 states and 42492 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:27,546 INFO L93 Difference]: Finished difference Result 12092 states and 44144 transitions. [2021-05-22 02:10:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:27,568 INFO L225 Difference]: With dead ends: 12092 [2021-05-22 02:10:27,568 INFO L226 Difference]: Without dead ends: 12062 [2021-05-22 02:10:27,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12062 states. [2021-05-22 02:10:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12062 to 11576. [2021-05-22 02:10:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11576 states, 11575 states have (on average 3.691317494600432) internal successors, (42727), 11575 states have internal predecessors, (42727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11576 states to 11576 states and 42727 transitions. [2021-05-22 02:10:27,745 INFO L78 Accepts]: Start accepts. Automaton has 11576 states and 42727 transitions. Word has length 27 [2021-05-22 02:10:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:27,745 INFO L482 AbstractCegarLoop]: Abstraction has 11576 states and 42727 transitions. [2021-05-22 02:10:27,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 11576 states and 42727 transitions. [2021-05-22 02:10:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:27,762 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:27,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:27,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:27,962 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:27,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1736892992, now seen corresponding path program 65 times [2021-05-22 02:10:27,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:27,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562477516] [2021-05-22 02:10:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:28,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:28,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562477516] [2021-05-22 02:10:28,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562477516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:28,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546037529] [2021-05-22 02:10:28,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:28,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:10:28,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:28,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:28,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:28,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546037529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:28,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:28,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:28,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432398465] [2021-05-22 02:10:28,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:28,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:28,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:28,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:28,222 INFO L87 Difference]: Start difference. First operand 11576 states and 42727 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:28,520 INFO L93 Difference]: Finished difference Result 11997 states and 43864 transitions. [2021-05-22 02:10:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:28,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:28,541 INFO L225 Difference]: With dead ends: 11997 [2021-05-22 02:10:28,541 INFO L226 Difference]: Without dead ends: 11917 [2021-05-22 02:10:28,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:28,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11917 states. [2021-05-22 02:10:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11917 to 11602. [2021-05-22 02:10:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11602 states, 11601 states have (on average 3.6938194983191104) internal successors, (42852), 11601 states have internal predecessors, (42852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11602 states to 11602 states and 42852 transitions. [2021-05-22 02:10:28,725 INFO L78 Accepts]: Start accepts. Automaton has 11602 states and 42852 transitions. Word has length 27 [2021-05-22 02:10:28,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:28,725 INFO L482 AbstractCegarLoop]: Abstraction has 11602 states and 42852 transitions. [2021-05-22 02:10:28,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 11602 states and 42852 transitions. [2021-05-22 02:10:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:28,742 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:28,742 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:28,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:28,943 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:28,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:28,943 INFO L82 PathProgramCache]: Analyzing trace with hash -73533572, now seen corresponding path program 66 times [2021-05-22 02:10:28,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:28,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471721148] [2021-05-22 02:10:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:29,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:29,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471721148] [2021-05-22 02:10:29,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471721148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:29,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095563238] [2021-05-22 02:10:29,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:29,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:10:29,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:29,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:29,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:29,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095563238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:29,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:29,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:29,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835431282] [2021-05-22 02:10:29,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:29,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:29,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:29,208 INFO L87 Difference]: Start difference. First operand 11602 states and 42852 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:29,456 INFO L93 Difference]: Finished difference Result 11771 states and 43353 transitions. [2021-05-22 02:10:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:10:29,456 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:29,477 INFO L225 Difference]: With dead ends: 11771 [2021-05-22 02:10:29,477 INFO L226 Difference]: Without dead ends: 11756 [2021-05-22 02:10:29,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:10:29,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11756 states. [2021-05-22 02:10:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11756 to 11607. [2021-05-22 02:10:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11607 states, 11606 states have (on average 3.694468378424953) internal successors, (42878), 11606 states have internal predecessors, (42878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11607 states to 11607 states and 42878 transitions. [2021-05-22 02:10:29,641 INFO L78 Accepts]: Start accepts. Automaton has 11607 states and 42878 transitions. Word has length 27 [2021-05-22 02:10:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:29,641 INFO L482 AbstractCegarLoop]: Abstraction has 11607 states and 42878 transitions. [2021-05-22 02:10:29,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:29,642 INFO L276 IsEmpty]: Start isEmpty. Operand 11607 states and 42878 transitions. [2021-05-22 02:10:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:29,658 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:29,658 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:29,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-22 02:10:29,858 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:29,858 INFO L82 PathProgramCache]: Analyzing trace with hash -819151172, now seen corresponding path program 67 times [2021-05-22 02:10:29,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:29,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243218402] [2021-05-22 02:10:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:29,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:29,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243218402] [2021-05-22 02:10:29,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243218402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:29,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372864675] [2021-05-22 02:10:29,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:29,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:29,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:30,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372864675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:30,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:30,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:30,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360300083] [2021-05-22 02:10:30,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:30,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:30,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:30,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:30,127 INFO L87 Difference]: Start difference. First operand 11607 states and 42878 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:30,449 INFO L93 Difference]: Finished difference Result 13036 states and 47204 transitions. [2021-05-22 02:10:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:10:30,450 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:30,474 INFO L225 Difference]: With dead ends: 13036 [2021-05-22 02:10:30,474 INFO L226 Difference]: Without dead ends: 12976 [2021-05-22 02:10:30,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:30,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12976 states. [2021-05-22 02:10:30,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12976 to 11956. [2021-05-22 02:10:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11956 states, 11955 states have (on average 3.700710999581765) internal successors, (44242), 11955 states have internal predecessors, (44242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:30,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11956 states to 11956 states and 44242 transitions. [2021-05-22 02:10:30,662 INFO L78 Accepts]: Start accepts. Automaton has 11956 states and 44242 transitions. Word has length 27 [2021-05-22 02:10:30,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:30,662 INFO L482 AbstractCegarLoop]: Abstraction has 11956 states and 44242 transitions. [2021-05-22 02:10:30,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand 11956 states and 44242 transitions. [2021-05-22 02:10:30,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:30,679 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:30,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:30,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:30,886 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:30,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:30,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1181413760, now seen corresponding path program 68 times [2021-05-22 02:10:30,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:30,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730302646] [2021-05-22 02:10:30,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:30,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:30,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730302646] [2021-05-22 02:10:30,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730302646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:30,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260269519] [2021-05-22 02:10:30,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:30,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:30,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:30,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:30,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:31,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260269519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:31,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:31,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:31,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265615060] [2021-05-22 02:10:31,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:31,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:31,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:31,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:31,103 INFO L87 Difference]: Start difference. First operand 11956 states and 44242 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:31,272 INFO L93 Difference]: Finished difference Result 12395 states and 45519 transitions. [2021-05-22 02:10:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:10:31,273 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:31,300 INFO L225 Difference]: With dead ends: 12395 [2021-05-22 02:10:31,300 INFO L226 Difference]: Without dead ends: 12365 [2021-05-22 02:10:31,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12365 states. [2021-05-22 02:10:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12365 to 11952. [2021-05-22 02:10:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11952 states, 11951 states have (on average 3.7014475776085685) internal successors, (44236), 11951 states have internal predecessors, (44236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11952 states to 11952 states and 44236 transitions. [2021-05-22 02:10:31,498 INFO L78 Accepts]: Start accepts. Automaton has 11952 states and 44236 transitions. Word has length 27 [2021-05-22 02:10:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:31,498 INFO L482 AbstractCegarLoop]: Abstraction has 11952 states and 44236 transitions. [2021-05-22 02:10:31,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 11952 states and 44236 transitions. [2021-05-22 02:10:31,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:31,516 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:31,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:31,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-22 02:10:31,729 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1510401284, now seen corresponding path program 69 times [2021-05-22 02:10:31,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:31,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050248913] [2021-05-22 02:10:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:31,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:31,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050248913] [2021-05-22 02:10:31,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050248913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:31,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907210073] [2021-05-22 02:10:31,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:31,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:10:31,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:31,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:31,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:31,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907210073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:31,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:31,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:31,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833207025] [2021-05-22 02:10:31,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:31,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:31,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:31,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:31,983 INFO L87 Difference]: Start difference. First operand 11952 states and 44236 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:32,191 INFO L93 Difference]: Finished difference Result 12368 states and 45416 transitions. [2021-05-22 02:10:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:32,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:32,216 INFO L225 Difference]: With dead ends: 12368 [2021-05-22 02:10:32,216 INFO L226 Difference]: Without dead ends: 12338 [2021-05-22 02:10:32,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2021-05-22 02:10:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 11996. [2021-05-22 02:10:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 3.7018757815756564) internal successors, (44404), 11995 states have internal predecessors, (44404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 44404 transitions. [2021-05-22 02:10:32,404 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 44404 transitions. Word has length 27 [2021-05-22 02:10:32,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:32,404 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 44404 transitions. [2021-05-22 02:10:32,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:32,404 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 44404 transitions. [2021-05-22 02:10:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:32,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:32,422 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:32,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-22 02:10:32,622 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:32,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1977800140, now seen corresponding path program 70 times [2021-05-22 02:10:32,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:32,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771893818] [2021-05-22 02:10:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:32,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:32,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771893818] [2021-05-22 02:10:32,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771893818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:32,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113821563] [2021-05-22 02:10:32,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:32,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:32,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:32,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:32,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:32,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113821563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:32,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:32,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:32,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045680586] [2021-05-22 02:10:32,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:32,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:32,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:32,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:32,849 INFO L87 Difference]: Start difference. First operand 11996 states and 44404 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:33,092 INFO L93 Difference]: Finished difference Result 12466 states and 45766 transitions. [2021-05-22 02:10:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:33,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:33,116 INFO L225 Difference]: With dead ends: 12466 [2021-05-22 02:10:33,117 INFO L226 Difference]: Without dead ends: 12395 [2021-05-22 02:10:33,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:33,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12395 states. [2021-05-22 02:10:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12395 to 12062. [2021-05-22 02:10:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12062 states, 12061 states have (on average 3.7025951413647293) internal successors, (44657), 12061 states have internal predecessors, (44657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12062 states to 12062 states and 44657 transitions. [2021-05-22 02:10:33,305 INFO L78 Accepts]: Start accepts. Automaton has 12062 states and 44657 transitions. Word has length 27 [2021-05-22 02:10:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:33,305 INFO L482 AbstractCegarLoop]: Abstraction has 12062 states and 44657 transitions. [2021-05-22 02:10:33,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 12062 states and 44657 transitions. [2021-05-22 02:10:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:33,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:33,324 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:33,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-22 02:10:33,525 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:33,525 INFO L82 PathProgramCache]: Analyzing trace with hash -387127492, now seen corresponding path program 71 times [2021-05-22 02:10:33,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:33,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239426137] [2021-05-22 02:10:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:33,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:33,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239426137] [2021-05-22 02:10:33,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239426137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:33,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766516237] [2021-05-22 02:10:33,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:33,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:10:33,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:33,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766516237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:33,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:33,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:33,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379990021] [2021-05-22 02:10:33,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:33,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:33,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:33,770 INFO L87 Difference]: Start difference. First operand 12062 states and 44657 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:33,958 INFO L93 Difference]: Finished difference Result 12451 states and 45748 transitions. [2021-05-22 02:10:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:10:33,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:33,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:33,984 INFO L225 Difference]: With dead ends: 12451 [2021-05-22 02:10:33,984 INFO L226 Difference]: Without dead ends: 12413 [2021-05-22 02:10:33,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12413 states. [2021-05-22 02:10:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12413 to 12104. [2021-05-22 02:10:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 3.702883582582831) internal successors, (44816), 12103 states have internal predecessors, (44816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 44816 transitions. [2021-05-22 02:10:34,288 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 44816 transitions. Word has length 27 [2021-05-22 02:10:34,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:34,288 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 44816 transitions. [2021-05-22 02:10:34,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:34,289 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 44816 transitions. [2021-05-22 02:10:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:34,310 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:34,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:34,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:34,511 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:34,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1978137212, now seen corresponding path program 72 times [2021-05-22 02:10:34,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:34,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172964581] [2021-05-22 02:10:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:34,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:34,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172964581] [2021-05-22 02:10:34,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172964581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:34,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288188192] [2021-05-22 02:10:34,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:34,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:10:34,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:34,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:34,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288188192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:34,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:34,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:34,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385758756] [2021-05-22 02:10:34,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:34,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:34,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:34,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:34,741 INFO L87 Difference]: Start difference. First operand 12104 states and 44816 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:35,012 INFO L93 Difference]: Finished difference Result 12499 states and 45950 transitions. [2021-05-22 02:10:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:35,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:35,038 INFO L225 Difference]: With dead ends: 12499 [2021-05-22 02:10:35,038 INFO L226 Difference]: Without dead ends: 12469 [2021-05-22 02:10:35,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12469 states. [2021-05-22 02:10:35,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12469 to 12148. [2021-05-22 02:10:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12148 states, 12147 states have (on average 3.7034658763480697) internal successors, (44986), 12147 states have internal predecessors, (44986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12148 states to 12148 states and 44986 transitions. [2021-05-22 02:10:35,237 INFO L78 Accepts]: Start accepts. Automaton has 12148 states and 44986 transitions. Word has length 27 [2021-05-22 02:10:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:35,237 INFO L482 AbstractCegarLoop]: Abstraction has 12148 states and 44986 transitions. [2021-05-22 02:10:35,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 12148 states and 44986 transitions. [2021-05-22 02:10:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:35,256 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:35,256 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:35,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:35,456 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:35,456 INFO L82 PathProgramCache]: Analyzing trace with hash -4216000, now seen corresponding path program 73 times [2021-05-22 02:10:35,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:35,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515482097] [2021-05-22 02:10:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:35,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:35,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515482097] [2021-05-22 02:10:35,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515482097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:35,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586108512] [2021-05-22 02:10:35,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:35,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:35,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:35,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586108512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:35,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:35,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:35,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429421142] [2021-05-22 02:10:35,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:35,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:35,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:35,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:35,681 INFO L87 Difference]: Start difference. First operand 12148 states and 44986 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:35,906 INFO L93 Difference]: Finished difference Result 12648 states and 46358 transitions. [2021-05-22 02:10:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:35,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:35,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:35,933 INFO L225 Difference]: With dead ends: 12648 [2021-05-22 02:10:35,933 INFO L226 Difference]: Without dead ends: 12604 [2021-05-22 02:10:35,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12604 states. [2021-05-22 02:10:36,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12604 to 12166. [2021-05-22 02:10:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12166 states, 12165 states have (on average 3.705219893136046) internal successors, (45074), 12165 states have internal predecessors, (45074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12166 states to 12166 states and 45074 transitions. [2021-05-22 02:10:36,142 INFO L78 Accepts]: Start accepts. Automaton has 12166 states and 45074 transitions. Word has length 27 [2021-05-22 02:10:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:36,142 INFO L482 AbstractCegarLoop]: Abstraction has 12166 states and 45074 transitions. [2021-05-22 02:10:36,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 12166 states and 45074 transitions. [2021-05-22 02:10:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:36,162 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:36,163 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:36,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:36,363 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash 903412800, now seen corresponding path program 74 times [2021-05-22 02:10:36,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:36,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112033599] [2021-05-22 02:10:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:36,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:36,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112033599] [2021-05-22 02:10:36,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112033599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:36,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75094215] [2021-05-22 02:10:36,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:36,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:36,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:36,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:36,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:36,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75094215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:36,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:36,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:10:36,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971562417] [2021-05-22 02:10:36,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:10:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:36,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:10:36,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:10:36,626 INFO L87 Difference]: Start difference. First operand 12166 states and 45074 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:36,921 INFO L93 Difference]: Finished difference Result 12571 states and 46145 transitions. [2021-05-22 02:10:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:36,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:36,955 INFO L225 Difference]: With dead ends: 12571 [2021-05-22 02:10:36,955 INFO L226 Difference]: Without dead ends: 12515 [2021-05-22 02:10:36,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:10:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12515 states. [2021-05-22 02:10:37,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12515 to 12209. [2021-05-22 02:10:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12209 states, 12208 states have (on average 3.705848623853211) internal successors, (45241), 12208 states have internal predecessors, (45241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12209 states to 12209 states and 45241 transitions. [2021-05-22 02:10:37,225 INFO L78 Accepts]: Start accepts. Automaton has 12209 states and 45241 transitions. Word has length 27 [2021-05-22 02:10:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:37,225 INFO L482 AbstractCegarLoop]: Abstraction has 12209 states and 45241 transitions. [2021-05-22 02:10:37,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 12209 states and 45241 transitions. [2021-05-22 02:10:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:37,250 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:37,250 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:37,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:37,465 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash -995116224, now seen corresponding path program 75 times [2021-05-22 02:10:37,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:37,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108462885] [2021-05-22 02:10:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:37,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:37,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108462885] [2021-05-22 02:10:37,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108462885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:37,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504791385] [2021-05-22 02:10:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:37,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:10:37,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:37,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:37,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:37,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504791385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:37,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:37,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:37,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767671506] [2021-05-22 02:10:37,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:37,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:37,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:37,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:37,697 INFO L87 Difference]: Start difference. First operand 12209 states and 45241 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:37,983 INFO L93 Difference]: Finished difference Result 12816 states and 46949 transitions. [2021-05-22 02:10:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:37,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:38,010 INFO L225 Difference]: With dead ends: 12816 [2021-05-22 02:10:38,010 INFO L226 Difference]: Without dead ends: 12786 [2021-05-22 02:10:38,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:10:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12786 states. [2021-05-22 02:10:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12786 to 12267. [2021-05-22 02:10:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12267 states, 12266 states have (on average 3.7053644219794553) internal successors, (45450), 12266 states have internal predecessors, (45450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12267 states to 12267 states and 45450 transitions. [2021-05-22 02:10:38,216 INFO L78 Accepts]: Start accepts. Automaton has 12267 states and 45450 transitions. Word has length 27 [2021-05-22 02:10:38,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:38,216 INFO L482 AbstractCegarLoop]: Abstraction has 12267 states and 45450 transitions. [2021-05-22 02:10:38,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 12267 states and 45450 transitions. [2021-05-22 02:10:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:38,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:38,234 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:38,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-05-22 02:10:38,435 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:38,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:38,435 INFO L82 PathProgramCache]: Analyzing trace with hash -527717368, now seen corresponding path program 76 times [2021-05-22 02:10:38,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:38,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680763521] [2021-05-22 02:10:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:38,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:38,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680763521] [2021-05-22 02:10:38,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680763521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:38,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729065402] [2021-05-22 02:10:38,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:38,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:38,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:38,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:38,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729065402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:38,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:38,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:38,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546741964] [2021-05-22 02:10:38,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:38,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:38,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:38,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:38,743 INFO L87 Difference]: Start difference. First operand 12267 states and 45450 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:39,013 INFO L93 Difference]: Finished difference Result 12669 states and 46586 transitions. [2021-05-22 02:10:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:39,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:39,038 INFO L225 Difference]: With dead ends: 12669 [2021-05-22 02:10:39,038 INFO L226 Difference]: Without dead ends: 12631 [2021-05-22 02:10:39,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:10:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-05-22 02:10:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 12291. [2021-05-22 02:10:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12291 states, 12290 states have (on average 3.7069975589910498) internal successors, (45559), 12290 states have internal predecessors, (45559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:39,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12291 states to 12291 states and 45559 transitions. [2021-05-22 02:10:39,241 INFO L78 Accepts]: Start accepts. Automaton has 12291 states and 45559 transitions. Word has length 27 [2021-05-22 02:10:39,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:39,241 INFO L482 AbstractCegarLoop]: Abstraction has 12291 states and 45559 transitions. [2021-05-22 02:10:39,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 12291 states and 45559 transitions. [2021-05-22 02:10:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:39,260 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:39,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:39,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:39,461 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash -20110840, now seen corresponding path program 77 times [2021-05-22 02:10:39,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:39,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747878727] [2021-05-22 02:10:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:39,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:39,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747878727] [2021-05-22 02:10:39,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747878727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:39,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331760294] [2021-05-22 02:10:39,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:39,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:10:39,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:39,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:39,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331760294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:39,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:39,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:39,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245345742] [2021-05-22 02:10:39,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:39,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:39,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:39,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:39,704 INFO L87 Difference]: Start difference. First operand 12291 states and 45559 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:40,018 INFO L93 Difference]: Finished difference Result 12456 states and 46048 transitions. [2021-05-22 02:10:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:10:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:40,042 INFO L225 Difference]: With dead ends: 12456 [2021-05-22 02:10:40,042 INFO L226 Difference]: Without dead ends: 12441 [2021-05-22 02:10:40,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:10:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12441 states. [2021-05-22 02:10:40,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12441 to 12288. [2021-05-22 02:10:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12288 states, 12287 states have (on average 3.7083909823390577) internal successors, (45565), 12287 states have internal predecessors, (45565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12288 states to 12288 states and 45565 transitions. [2021-05-22 02:10:40,238 INFO L78 Accepts]: Start accepts. Automaton has 12288 states and 45565 transitions. Word has length 27 [2021-05-22 02:10:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:40,239 INFO L482 AbstractCegarLoop]: Abstraction has 12288 states and 45565 transitions. [2021-05-22 02:10:40,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 12288 states and 45565 transitions. [2021-05-22 02:10:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:40,258 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:40,258 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:40,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:40,458 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:40,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1507837696, now seen corresponding path program 78 times [2021-05-22 02:10:40,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:40,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602797270] [2021-05-22 02:10:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:40,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:40,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602797270] [2021-05-22 02:10:40,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602797270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:40,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55867069] [2021-05-22 02:10:40,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:40,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:10:40,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:40,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:40,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:40,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55867069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:40,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:40,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:40,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159669922] [2021-05-22 02:10:40,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:40,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:40,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:40,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:40,676 INFO L87 Difference]: Start difference. First operand 12288 states and 45565 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:40,918 INFO L93 Difference]: Finished difference Result 12934 states and 47416 transitions. [2021-05-22 02:10:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:40,946 INFO L225 Difference]: With dead ends: 12934 [2021-05-22 02:10:40,946 INFO L226 Difference]: Without dead ends: 12890 [2021-05-22 02:10:40,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:10:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2021-05-22 02:10:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 12354. [2021-05-22 02:10:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12354 states, 12353 states have (on average 3.7074394883833888) internal successors, (45798), 12353 states have internal predecessors, (45798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12354 states to 12354 states and 45798 transitions. [2021-05-22 02:10:41,155 INFO L78 Accepts]: Start accepts. Automaton has 12354 states and 45798 transitions. Word has length 27 [2021-05-22 02:10:41,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:41,156 INFO L482 AbstractCegarLoop]: Abstraction has 12354 states and 45798 transitions. [2021-05-22 02:10:41,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:41,156 INFO L276 IsEmpty]: Start isEmpty. Operand 12354 states and 45798 transitions. [2021-05-22 02:10:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:41,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:41,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:41,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:41,381 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1631076228, now seen corresponding path program 79 times [2021-05-22 02:10:41,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:41,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472384420] [2021-05-22 02:10:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:41,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:41,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472384420] [2021-05-22 02:10:41,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472384420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:41,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551727552] [2021-05-22 02:10:41,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:41,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:41,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:41,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551727552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:41,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:41,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:41,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018135475] [2021-05-22 02:10:41,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:41,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:41,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:41,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:41,597 INFO L87 Difference]: Start difference. First operand 12354 states and 45798 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:41,802 INFO L93 Difference]: Finished difference Result 12785 states and 46949 transitions. [2021-05-22 02:10:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:41,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:41,828 INFO L225 Difference]: With dead ends: 12785 [2021-05-22 02:10:41,828 INFO L226 Difference]: Without dead ends: 12687 [2021-05-22 02:10:41,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:10:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12687 states. [2021-05-22 02:10:41,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12687 to 12380. [2021-05-22 02:10:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12380 states, 12379 states have (on average 3.7087002181113173) internal successors, (45910), 12379 states have internal predecessors, (45910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12380 states to 12380 states and 45910 transitions. [2021-05-22 02:10:42,031 INFO L78 Accepts]: Start accepts. Automaton has 12380 states and 45910 transitions. Word has length 27 [2021-05-22 02:10:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:42,031 INFO L482 AbstractCegarLoop]: Abstraction has 12380 states and 45910 transitions. [2021-05-22 02:10:42,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 12380 states and 45910 transitions. [2021-05-22 02:10:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:42,050 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:42,050 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:42,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:42,250 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:42,250 INFO L82 PathProgramCache]: Analyzing trace with hash -179350336, now seen corresponding path program 80 times [2021-05-22 02:10:42,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:42,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234341346] [2021-05-22 02:10:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:42,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:42,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234341346] [2021-05-22 02:10:42,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234341346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:42,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871526881] [2021-05-22 02:10:42,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:42,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:42,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:42,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:42,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:42,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871526881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:42,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:42,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:42,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993052926] [2021-05-22 02:10:42,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:42,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:42,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:42,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:42,478 INFO L87 Difference]: Start difference. First operand 12380 states and 45910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:42,788 INFO L93 Difference]: Finished difference Result 12574 states and 46469 transitions. [2021-05-22 02:10:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:10:42,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:42,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:42,809 INFO L225 Difference]: With dead ends: 12574 [2021-05-22 02:10:42,810 INFO L226 Difference]: Without dead ends: 12552 [2021-05-22 02:10:42,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:10:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12552 states. [2021-05-22 02:10:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12552 to 12373. [2021-05-22 02:10:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12373 states, 12372 states have (on average 3.7103136113805366) internal successors, (45904), 12372 states have internal predecessors, (45904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12373 states to 12373 states and 45904 transitions. [2021-05-22 02:10:42,988 INFO L78 Accepts]: Start accepts. Automaton has 12373 states and 45904 transitions. Word has length 27 [2021-05-22 02:10:42,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:42,988 INFO L482 AbstractCegarLoop]: Abstraction has 12373 states and 45904 transitions. [2021-05-22 02:10:42,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 12373 states and 45904 transitions. [2021-05-22 02:10:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:43,007 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:43,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:43,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-22 02:10:43,208 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:43,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:43,208 INFO L82 PathProgramCache]: Analyzing trace with hash 887736380, now seen corresponding path program 81 times [2021-05-22 02:10:43,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:43,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168566972] [2021-05-22 02:10:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:43,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:43,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168566972] [2021-05-22 02:10:43,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168566972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:43,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875776781] [2021-05-22 02:10:43,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:43,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:10:43,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:43,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:43,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:43,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875776781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:43,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:43,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:43,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677809168] [2021-05-22 02:10:43,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:43,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:43,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:43,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:43,441 INFO L87 Difference]: Start difference. First operand 12373 states and 45904 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:43,764 INFO L93 Difference]: Finished difference Result 13084 states and 47922 transitions. [2021-05-22 02:10:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:10:43,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:43,791 INFO L225 Difference]: With dead ends: 13084 [2021-05-22 02:10:43,791 INFO L226 Difference]: Without dead ends: 13054 [2021-05-22 02:10:43,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:43,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2021-05-22 02:10:43,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 12469. [2021-05-22 02:10:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12469 states, 12468 states have (on average 3.7080526146936155) internal successors, (46232), 12468 states have internal predecessors, (46232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12469 states to 12469 states and 46232 transitions. [2021-05-22 02:10:44,008 INFO L78 Accepts]: Start accepts. Automaton has 12469 states and 46232 transitions. Word has length 27 [2021-05-22 02:10:44,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:44,008 INFO L482 AbstractCegarLoop]: Abstraction has 12469 states and 46232 transitions. [2021-05-22 02:10:44,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:44,009 INFO L276 IsEmpty]: Start isEmpty. Operand 12469 states and 46232 transitions. [2021-05-22 02:10:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:44,028 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:44,029 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:44,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-22 02:10:44,229 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:44,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1977991744, now seen corresponding path program 82 times [2021-05-22 02:10:44,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:44,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037164058] [2021-05-22 02:10:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:44,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:44,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037164058] [2021-05-22 02:10:44,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037164058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:44,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117188664] [2021-05-22 02:10:44,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:44,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:44,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:44,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:44,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:44,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117188664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:44,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:44,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:44,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071918517] [2021-05-22 02:10:44,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:44,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:44,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:44,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:44,473 INFO L87 Difference]: Start difference. First operand 12469 states and 46232 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:44,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:44,679 INFO L93 Difference]: Finished difference Result 12896 states and 47434 transitions. [2021-05-22 02:10:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:10:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:44,707 INFO L225 Difference]: With dead ends: 12896 [2021-05-22 02:10:44,707 INFO L226 Difference]: Without dead ends: 12812 [2021-05-22 02:10:44,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12812 states. [2021-05-22 02:10:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12812 to 12548. [2021-05-22 02:10:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12548 states, 12547 states have (on average 3.7084562046704392) internal successors, (46530), 12547 states have internal predecessors, (46530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12548 states to 12548 states and 46530 transitions. [2021-05-22 02:10:44,908 INFO L78 Accepts]: Start accepts. Automaton has 12548 states and 46530 transitions. Word has length 27 [2021-05-22 02:10:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:44,908 INFO L482 AbstractCegarLoop]: Abstraction has 12548 states and 46530 transitions. [2021-05-22 02:10:44,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 12548 states and 46530 transitions. [2021-05-22 02:10:44,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:44,929 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:44,929 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:45,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:45,130 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:45,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:45,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1395187844, now seen corresponding path program 83 times [2021-05-22 02:10:45,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:45,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281812003] [2021-05-22 02:10:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:45,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:45,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281812003] [2021-05-22 02:10:45,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281812003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:45,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771648555] [2021-05-22 02:10:45,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:45,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:10:45,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:45,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:45,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:45,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771648555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:45,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:45,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:45,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372728797] [2021-05-22 02:10:45,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:45,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:45,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:45,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:45,358 INFO L87 Difference]: Start difference. First operand 12548 states and 46530 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:45,585 INFO L93 Difference]: Finished difference Result 12969 states and 47738 transitions. [2021-05-22 02:10:45,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:45,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:45,610 INFO L225 Difference]: With dead ends: 12969 [2021-05-22 02:10:45,611 INFO L226 Difference]: Without dead ends: 12939 [2021-05-22 02:10:45,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12939 states. [2021-05-22 02:10:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12939 to 12565. [2021-05-22 02:10:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 3.7117160140082777) internal successors, (46634), 12564 states have internal predecessors, (46634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 46634 transitions. [2021-05-22 02:10:45,824 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 46634 transitions. Word has length 27 [2021-05-22 02:10:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:45,824 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 46634 transitions. [2021-05-22 02:10:45,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 46634 transitions. [2021-05-22 02:10:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:45,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:45,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:46,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:46,045 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:46,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1958802428, now seen corresponding path program 84 times [2021-05-22 02:10:46,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:46,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153766229] [2021-05-22 02:10:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:46,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:46,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153766229] [2021-05-22 02:10:46,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153766229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:46,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671606120] [2021-05-22 02:10:46,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:46,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:10:46,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:46,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:46,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:46,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671606120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:46,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:46,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:46,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8641385] [2021-05-22 02:10:46,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:46,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:46,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:46,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:46,324 INFO L87 Difference]: Start difference. First operand 12565 states and 46634 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:46,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:46,639 INFO L93 Difference]: Finished difference Result 13017 states and 47934 transitions. [2021-05-22 02:10:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:46,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:46,665 INFO L225 Difference]: With dead ends: 13017 [2021-05-22 02:10:46,665 INFO L226 Difference]: Without dead ends: 12987 [2021-05-22 02:10:46,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 243.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:10:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12987 states. [2021-05-22 02:10:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12987 to 12637. [2021-05-22 02:10:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12637 states, 12636 states have (on average 3.7109844887622665) internal successors, (46892), 12636 states have internal predecessors, (46892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12637 states to 12637 states and 46892 transitions. [2021-05-22 02:10:46,935 INFO L78 Accepts]: Start accepts. Automaton has 12637 states and 46892 transitions. Word has length 27 [2021-05-22 02:10:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:46,935 INFO L482 AbstractCegarLoop]: Abstraction has 12637 states and 46892 transitions. [2021-05-22 02:10:46,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 12637 states and 46892 transitions. [2021-05-22 02:10:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:46,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:46,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:47,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:47,156 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1037014720, now seen corresponding path program 85 times [2021-05-22 02:10:47,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:47,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073765199] [2021-05-22 02:10:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:47,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:47,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073765199] [2021-05-22 02:10:47,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073765199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:47,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531408191] [2021-05-22 02:10:47,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:47,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:47,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531408191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:47,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:47,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:47,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693459940] [2021-05-22 02:10:47,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:47,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:47,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:47,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:47,374 INFO L87 Difference]: Start difference. First operand 12637 states and 46892 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:47,663 INFO L93 Difference]: Finished difference Result 13031 states and 47962 transitions. [2021-05-22 02:10:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:10:47,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:47,689 INFO L225 Difference]: With dead ends: 13031 [2021-05-22 02:10:47,689 INFO L226 Difference]: Without dead ends: 12951 [2021-05-22 02:10:47,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:10:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12951 states. [2021-05-22 02:10:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12951 to 12663. [2021-05-22 02:10:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12663 states, 12662 states have (on average 3.7132364555362503) internal successors, (47017), 12662 states have internal predecessors, (47017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12663 states to 12663 states and 47017 transitions. [2021-05-22 02:10:47,898 INFO L78 Accepts]: Start accepts. Automaton has 12663 states and 47017 transitions. Word has length 27 [2021-05-22 02:10:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:47,898 INFO L482 AbstractCegarLoop]: Abstraction has 12663 states and 47017 transitions. [2021-05-22 02:10:47,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 12663 states and 47017 transitions. [2021-05-22 02:10:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:10:47,918 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:47,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:48,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:48,119 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:48,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:48,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1052109376, now seen corresponding path program 86 times [2021-05-22 02:10:48,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:48,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425055073] [2021-05-22 02:10:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:48,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:48,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425055073] [2021-05-22 02:10:48,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425055073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:48,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646081959] [2021-05-22 02:10:48,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:48,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:48,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:10:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:48,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646081959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:48,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:48,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:48,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129149182] [2021-05-22 02:10:48,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:48,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:48,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:48,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:48,444 INFO L87 Difference]: Start difference. First operand 12663 states and 47017 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:48,766 INFO L93 Difference]: Finished difference Result 12828 states and 47506 transitions. [2021-05-22 02:10:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:10:48,766 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:10:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:48,791 INFO L225 Difference]: With dead ends: 12828 [2021-05-22 02:10:48,791 INFO L226 Difference]: Without dead ends: 12813 [2021-05-22 02:10:48,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:10:48,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12813 states. [2021-05-22 02:10:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12813 to 12651. [2021-05-22 02:10:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 3.714229249011858) internal successors, (46985), 12650 states have internal predecessors, (46985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:48,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 46985 transitions. [2021-05-22 02:10:48,990 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 46985 transitions. Word has length 27 [2021-05-22 02:10:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:48,990 INFO L482 AbstractCegarLoop]: Abstraction has 12651 states and 46985 transitions. [2021-05-22 02:10:48,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 46985 transitions. [2021-05-22 02:10:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:10:49,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:49,011 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:49,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:49,212 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:49,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1489264556, now seen corresponding path program 87 times [2021-05-22 02:10:49,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:49,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138263241] [2021-05-22 02:10:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:10:49,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:49,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138263241] [2021-05-22 02:10:49,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138263241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:49,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971348600] [2021-05-22 02:10:49,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:49,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:10:49,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:49,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:10:49,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-22 02:10:49,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971348600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:49,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:49,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:49,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728177614] [2021-05-22 02:10:49,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:49,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:49,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:49,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:49,352 INFO L87 Difference]: Start difference. First operand 12651 states and 46985 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:49,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:49,878 INFO L93 Difference]: Finished difference Result 22245 states and 78518 transitions. [2021-05-22 02:10:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:10:49,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:10:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:49,926 INFO L225 Difference]: With dead ends: 22245 [2021-05-22 02:10:49,926 INFO L226 Difference]: Without dead ends: 22157 [2021-05-22 02:10:49,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:10:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22157 states. [2021-05-22 02:10:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22157 to 13996. [2021-05-22 02:10:50,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13996 states, 13995 states have (on average 3.697463379778492) internal successors, (51746), 13995 states have internal predecessors, (51746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13996 states to 13996 states and 51746 transitions. [2021-05-22 02:10:50,201 INFO L78 Accepts]: Start accepts. Automaton has 13996 states and 51746 transitions. Word has length 29 [2021-05-22 02:10:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:50,201 INFO L482 AbstractCegarLoop]: Abstraction has 13996 states and 51746 transitions. [2021-05-22 02:10:50,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 13996 states and 51746 transitions. [2021-05-22 02:10:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:10:50,224 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:50,224 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:50,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:50,425 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1582018668, now seen corresponding path program 88 times [2021-05-22 02:10:50,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:50,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884091740] [2021-05-22 02:10:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:10:50,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:50,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884091740] [2021-05-22 02:10:50,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884091740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:50,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444240463] [2021-05-22 02:10:50,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:50,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:50,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:50,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:10:50,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:10:50,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444240463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:50,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:50,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:10:50,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232874692] [2021-05-22 02:10:50,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:10:50,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:50,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:10:50,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:10:50,570 INFO L87 Difference]: Start difference. First operand 13996 states and 51746 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:50,785 INFO L93 Difference]: Finished difference Result 20503 states and 74398 transitions. [2021-05-22 02:10:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:10:50,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:10:50,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:50,826 INFO L225 Difference]: With dead ends: 20503 [2021-05-22 02:10:50,826 INFO L226 Difference]: Without dead ends: 20406 [2021-05-22 02:10:50,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:10:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20406 states. [2021-05-22 02:10:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20406 to 17863. [2021-05-22 02:10:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.743141865412608) internal successors, (66860), 17862 states have internal predecessors, (66860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 66860 transitions. [2021-05-22 02:10:51,226 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 66860 transitions. Word has length 29 [2021-05-22 02:10:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:51,226 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 66860 transitions. [2021-05-22 02:10:51,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 66860 transitions. [2021-05-22 02:10:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:10:51,254 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:51,254 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:51,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:51,455 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:51,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:51,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1828893528, now seen corresponding path program 89 times [2021-05-22 02:10:51,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:51,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558317215] [2021-05-22 02:10:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-22 02:10:51,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:51,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558317215] [2021-05-22 02:10:51,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558317215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:51,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100619481] [2021-05-22 02:10:51,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:51,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:10:51,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:51,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:10:51,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-22 02:10:51,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100619481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:51,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:51,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:10:51,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566135760] [2021-05-22 02:10:51,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:10:51,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:51,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:10:51,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:10:51,559 INFO L87 Difference]: Start difference. First operand 17863 states and 66860 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:52,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:52,199 INFO L93 Difference]: Finished difference Result 41463 states and 150404 transitions. [2021-05-22 02:10:52,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:10:52,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:10:52,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:52,288 INFO L225 Difference]: With dead ends: 41463 [2021-05-22 02:10:52,288 INFO L226 Difference]: Without dead ends: 40731 [2021-05-22 02:10:52,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=456, Invalid=1436, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:10:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40731 states. [2021-05-22 02:10:52,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40731 to 28028. [2021-05-22 02:10:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28028 states, 28027 states have (on average 3.774895636350662) internal successors, (105799), 28027 states have internal predecessors, (105799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28028 states to 28028 states and 105799 transitions. [2021-05-22 02:10:52,996 INFO L78 Accepts]: Start accepts. Automaton has 28028 states and 105799 transitions. Word has length 29 [2021-05-22 02:10:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:52,996 INFO L482 AbstractCegarLoop]: Abstraction has 28028 states and 105799 transitions. [2021-05-22 02:10:52,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 28028 states and 105799 transitions. [2021-05-22 02:10:53,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:10:53,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:53,045 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:53,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-22 02:10:53,247 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:53,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:53,247 INFO L82 PathProgramCache]: Analyzing trace with hash 904383528, now seen corresponding path program 90 times [2021-05-22 02:10:53,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:53,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965338573] [2021-05-22 02:10:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:10:53,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:53,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965338573] [2021-05-22 02:10:53,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965338573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:53,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833184783] [2021-05-22 02:10:53,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:53,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:10:53,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:53,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:10:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:10:53,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833184783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:53,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:53,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:53,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939549064] [2021-05-22 02:10:53,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:53,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:53,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:53,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:53,377 INFO L87 Difference]: Start difference. First operand 28028 states and 105799 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:54,357 INFO L93 Difference]: Finished difference Result 54693 states and 194613 transitions. [2021-05-22 02:10:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-22 02:10:54,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:10:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:54,679 INFO L225 Difference]: With dead ends: 54693 [2021-05-22 02:10:54,679 INFO L226 Difference]: Without dead ends: 54103 [2021-05-22 02:10:54,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=805, Invalid=2855, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:10:54,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54103 states. [2021-05-22 02:10:55,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54103 to 31277. [2021-05-22 02:10:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31277 states, 31276 states have (on average 3.7364432791917124) internal successors, (116861), 31276 states have internal predecessors, (116861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31277 states to 31277 states and 116861 transitions. [2021-05-22 02:10:55,461 INFO L78 Accepts]: Start accepts. Automaton has 31277 states and 116861 transitions. Word has length 29 [2021-05-22 02:10:55,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:55,461 INFO L482 AbstractCegarLoop]: Abstraction has 31277 states and 116861 transitions. [2021-05-22 02:10:55,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 31277 states and 116861 transitions. [2021-05-22 02:10:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:10:55,511 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:55,511 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:55,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:55,711 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:55,712 INFO L82 PathProgramCache]: Analyzing trace with hash 816620900, now seen corresponding path program 91 times [2021-05-22 02:10:55,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:55,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498982535] [2021-05-22 02:10:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:10:55,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:55,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498982535] [2021-05-22 02:10:55,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498982535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:55,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52090302] [2021-05-22 02:10:55,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:55,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:10:55,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:10:55,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52090302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:55,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:55,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-05-22 02:10:55,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794269851] [2021-05-22 02:10:55,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:10:55,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:55,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:10:55,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:10:55,828 INFO L87 Difference]: Start difference. First operand 31277 states and 116861 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:56,119 INFO L93 Difference]: Finished difference Result 41400 states and 152146 transitions. [2021-05-22 02:10:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:10:56,119 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:10:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:56,217 INFO L225 Difference]: With dead ends: 41400 [2021-05-22 02:10:56,217 INFO L226 Difference]: Without dead ends: 41184 [2021-05-22 02:10:56,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:10:56,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41184 states. [2021-05-22 02:10:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41184 to 36746. [2021-05-22 02:10:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36746 states, 36745 states have (on average 3.781221934957137) internal successors, (138941), 36745 states have internal predecessors, (138941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36746 states to 36746 states and 138941 transitions. [2021-05-22 02:10:57,324 INFO L78 Accepts]: Start accepts. Automaton has 36746 states and 138941 transitions. Word has length 29 [2021-05-22 02:10:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:57,324 INFO L482 AbstractCegarLoop]: Abstraction has 36746 states and 138941 transitions. [2021-05-22 02:10:57,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 36746 states and 138941 transitions. [2021-05-22 02:10:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:10:57,396 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:57,396 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:57,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-22 02:10:57,597 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:57,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1324656412, now seen corresponding path program 92 times [2021-05-22 02:10:57,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:57,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145106582] [2021-05-22 02:10:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:10:57,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:57,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145106582] [2021-05-22 02:10:57,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145106582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:57,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987643898] [2021-05-22 02:10:57,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:57,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:57,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:57,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:10:57,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:10:57,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987643898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:57,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:57,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:10:57,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647187927] [2021-05-22 02:10:57,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:10:57,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:10:57,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:10:57,918 INFO L87 Difference]: Start difference. First operand 36746 states and 138941 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:59,005 INFO L93 Difference]: Finished difference Result 60231 states and 218468 transitions. [2021-05-22 02:10:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-22 02:10:59,006 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:10:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:59,293 INFO L225 Difference]: With dead ends: 60231 [2021-05-22 02:10:59,293 INFO L226 Difference]: Without dead ends: 59842 [2021-05-22 02:10:59,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 519.0ms TimeCoverageRelationStatistics Valid=780, Invalid=2880, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:10:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59842 states. [2021-05-22 02:11:00,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59842 to 45321. [2021-05-22 02:11:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45321 states, 45320 states have (on average 3.791306266548985) internal successors, (171822), 45320 states have internal predecessors, (171822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45321 states to 45321 states and 171822 transitions. [2021-05-22 02:11:00,702 INFO L78 Accepts]: Start accepts. Automaton has 45321 states and 171822 transitions. Word has length 29 [2021-05-22 02:11:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:00,703 INFO L482 AbstractCegarLoop]: Abstraction has 45321 states and 171822 transitions. [2021-05-22 02:11:00,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 45321 states and 171822 transitions. [2021-05-22 02:11:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:00,770 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:00,770 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:00,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:00,971 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:00,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:00,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1852635552, now seen corresponding path program 93 times [2021-05-22 02:11:00,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:00,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157484855] [2021-05-22 02:11:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:11:00,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:00,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157484855] [2021-05-22 02:11:00,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157484855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:00,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318617178] [2021-05-22 02:11:00,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:01,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:11:01,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:01,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:01,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:11:01,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318617178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:01,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:01,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:11:01,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907258382] [2021-05-22 02:11:01,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:11:01,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:01,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:11:01,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:11:01,072 INFO L87 Difference]: Start difference. First operand 45321 states and 171822 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:02,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:02,198 INFO L93 Difference]: Finished difference Result 61448 states and 220290 transitions. [2021-05-22 02:11:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-22 02:11:02,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:02,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:02,361 INFO L225 Difference]: With dead ends: 61448 [2021-05-22 02:11:02,361 INFO L226 Difference]: Without dead ends: 61268 [2021-05-22 02:11:02,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 608.9ms TimeCoverageRelationStatistics Valid=767, Invalid=2893, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:11:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61268 states. [2021-05-22 02:11:03,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61268 to 46515. [2021-05-22 02:11:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46515 states, 46514 states have (on average 3.783893021455906) internal successors, (176004), 46514 states have internal predecessors, (176004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46515 states to 46515 states and 176004 transitions. [2021-05-22 02:11:03,779 INFO L78 Accepts]: Start accepts. Automaton has 46515 states and 176004 transitions. Word has length 29 [2021-05-22 02:11:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:03,779 INFO L482 AbstractCegarLoop]: Abstraction has 46515 states and 176004 transitions. [2021-05-22 02:11:03,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 46515 states and 176004 transitions. [2021-05-22 02:11:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:04,121 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:04,122 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:04,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-22 02:11:04,345 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:04,345 INFO L82 PathProgramCache]: Analyzing trace with hash -505873000, now seen corresponding path program 94 times [2021-05-22 02:11:04,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:04,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393210222] [2021-05-22 02:11:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:11:04,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:04,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393210222] [2021-05-22 02:11:04,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393210222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:04,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838708362] [2021-05-22 02:11:04,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:04,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:11:04,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:04,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:04,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-22 02:11:04,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838708362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:04,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:04,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-22 02:11:04,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231887311] [2021-05-22 02:11:04,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:11:04,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:04,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:11:04,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:11:04,421 INFO L87 Difference]: Start difference. First operand 46515 states and 176004 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:04,775 INFO L93 Difference]: Finished difference Result 58737 states and 220575 transitions. [2021-05-22 02:11:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:11:04,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:04,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:05,197 INFO L225 Difference]: With dead ends: 58737 [2021-05-22 02:11:05,198 INFO L226 Difference]: Without dead ends: 58715 [2021-05-22 02:11:05,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:11:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58715 states. [2021-05-22 02:11:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58715 to 54562. [2021-05-22 02:11:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54562 states, 54561 states have (on average 3.806143582412346) internal successors, (207667), 54561 states have internal predecessors, (207667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54562 states to 54562 states and 207667 transitions. [2021-05-22 02:11:06,830 INFO L78 Accepts]: Start accepts. Automaton has 54562 states and 207667 transitions. Word has length 29 [2021-05-22 02:11:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:06,830 INFO L482 AbstractCegarLoop]: Abstraction has 54562 states and 207667 transitions. [2021-05-22 02:11:06,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 54562 states and 207667 transitions. [2021-05-22 02:11:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:06,927 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:06,927 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:07,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-22 02:11:07,127 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:07,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2054404452, now seen corresponding path program 95 times [2021-05-22 02:11:07,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:07,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943560309] [2021-05-22 02:11:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:11:07,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:07,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943560309] [2021-05-22 02:11:07,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943560309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:07,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951285869] [2021-05-22 02:11:07,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:07,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:11:07,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:07,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:07,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:07,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951285869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:07,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:07,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:11:07,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879453931] [2021-05-22 02:11:07,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:11:07,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:07,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:11:07,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:11:07,229 INFO L87 Difference]: Start difference. First operand 54562 states and 207667 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:08,675 INFO L93 Difference]: Finished difference Result 79748 states and 284600 transitions. [2021-05-22 02:11:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-22 02:11:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:08,886 INFO L225 Difference]: With dead ends: 79748 [2021-05-22 02:11:08,886 INFO L226 Difference]: Without dead ends: 79619 [2021-05-22 02:11:08,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=1227, Invalid=5093, Unknown=0, NotChecked=0, Total=6320 [2021-05-22 02:11:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79619 states. [2021-05-22 02:11:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79619 to 55774. [2021-05-22 02:11:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55774 states, 55773 states have (on average 3.7706954978215266) internal successors, (210303), 55773 states have internal predecessors, (210303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55774 states to 55774 states and 210303 transitions. [2021-05-22 02:11:10,815 INFO L78 Accepts]: Start accepts. Automaton has 55774 states and 210303 transitions. Word has length 29 [2021-05-22 02:11:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:10,815 INFO L482 AbstractCegarLoop]: Abstraction has 55774 states and 210303 transitions. [2021-05-22 02:11:10,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 55774 states and 210303 transitions. [2021-05-22 02:11:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:10,913 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:10,913 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:11,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-22 02:11:11,114 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:11,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:11,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1716737040, now seen corresponding path program 96 times [2021-05-22 02:11:11,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:11,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490672573] [2021-05-22 02:11:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:11,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:11,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490672573] [2021-05-22 02:11:11,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490672573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:11,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830904354] [2021-05-22 02:11:11,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:11,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:11:11,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:11,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:11,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:11,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830904354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:11,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:11,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2021-05-22 02:11:11,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510505146] [2021-05-22 02:11:11,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:11:11,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:11,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:11:11,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:11:11,246 INFO L87 Difference]: Start difference. First operand 55774 states and 210303 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:12,081 INFO L93 Difference]: Finished difference Result 60437 states and 224551 transitions. [2021-05-22 02:11:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:11:12,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:12,248 INFO L225 Difference]: With dead ends: 60437 [2021-05-22 02:11:12,249 INFO L226 Difference]: Without dead ends: 60405 [2021-05-22 02:11:12,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:11:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60405 states. [2021-05-22 02:11:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60405 to 49962. [2021-05-22 02:11:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49962 states, 49961 states have (on average 3.74323972698705) internal successors, (187016), 49961 states have internal predecessors, (187016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49962 states to 49962 states and 187016 transitions. [2021-05-22 02:11:13,549 INFO L78 Accepts]: Start accepts. Automaton has 49962 states and 187016 transitions. Word has length 29 [2021-05-22 02:11:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:13,549 INFO L482 AbstractCegarLoop]: Abstraction has 49962 states and 187016 transitions. [2021-05-22 02:11:13,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 49962 states and 187016 transitions. [2021-05-22 02:11:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:13,621 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:13,621 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:13,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:13,822 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:13,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1220322522, now seen corresponding path program 97 times [2021-05-22 02:11:13,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:13,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225910902] [2021-05-22 02:11:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:11:13,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:13,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225910902] [2021-05-22 02:11:13,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225910902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:13,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552717856] [2021-05-22 02:11:13,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:13,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:13,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:11:13,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552717856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:13,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:13,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-22 02:11:13,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519419279] [2021-05-22 02:11:13,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:11:13,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:13,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:11:13,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:11:13,910 INFO L87 Difference]: Start difference. First operand 49962 states and 187016 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:14,564 INFO L93 Difference]: Finished difference Result 60595 states and 223581 transitions. [2021-05-22 02:11:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:11:14,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:14,714 INFO L225 Difference]: With dead ends: 60595 [2021-05-22 02:11:14,714 INFO L226 Difference]: Without dead ends: 60532 [2021-05-22 02:11:14,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:11:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60532 states. [2021-05-22 02:11:15,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60532 to 55220. [2021-05-22 02:11:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55220 states, 55219 states have (on average 3.765171408392039) internal successors, (207909), 55219 states have internal predecessors, (207909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55220 states to 55220 states and 207909 transitions. [2021-05-22 02:11:16,209 INFO L78 Accepts]: Start accepts. Automaton has 55220 states and 207909 transitions. Word has length 29 [2021-05-22 02:11:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:16,209 INFO L482 AbstractCegarLoop]: Abstraction has 55220 states and 207909 transitions. [2021-05-22 02:11:16,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 55220 states and 207909 transitions. [2021-05-22 02:11:16,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:16,311 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:16,312 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:16,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-22 02:11:16,513 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:16,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:16,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1949620774, now seen corresponding path program 98 times [2021-05-22 02:11:16,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:16,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726784760] [2021-05-22 02:11:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:16,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:16,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726784760] [2021-05-22 02:11:16,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726784760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:16,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545306260] [2021-05-22 02:11:16,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:16,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:11:16,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:16,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:16,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:11:16,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545306260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:16,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:16,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:11:16,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923148439] [2021-05-22 02:11:16,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:11:16,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:16,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:11:16,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:11:16,975 INFO L87 Difference]: Start difference. First operand 55220 states and 207909 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:17,916 INFO L93 Difference]: Finished difference Result 66898 states and 242065 transitions. [2021-05-22 02:11:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:11:17,917 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:18,104 INFO L225 Difference]: With dead ends: 66898 [2021-05-22 02:11:18,104 INFO L226 Difference]: Without dead ends: 66524 [2021-05-22 02:11:18,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:11:18,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66524 states. [2021-05-22 02:11:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66524 to 50787. [2021-05-22 02:11:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50787 states, 50786 states have (on average 3.7521167250817156) internal successors, (190555), 50786 states have internal predecessors, (190555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50787 states to 50787 states and 190555 transitions. [2021-05-22 02:11:19,769 INFO L78 Accepts]: Start accepts. Automaton has 50787 states and 190555 transitions. Word has length 29 [2021-05-22 02:11:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:19,769 INFO L482 AbstractCegarLoop]: Abstraction has 50787 states and 190555 transitions. [2021-05-22 02:11:19,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand 50787 states and 190555 transitions. [2021-05-22 02:11:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:19,842 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:19,842 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:20,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:20,043 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:20,043 INFO L82 PathProgramCache]: Analyzing trace with hash -315726062, now seen corresponding path program 99 times [2021-05-22 02:11:20,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:20,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607048206] [2021-05-22 02:11:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:20,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:20,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607048206] [2021-05-22 02:11:20,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607048206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:20,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46765155] [2021-05-22 02:11:20,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:20,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:11:20,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:20,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-22 02:11:20,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46765155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:20,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:20,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-22 02:11:20,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624858802] [2021-05-22 02:11:20,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:11:20,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:20,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:11:20,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:11:20,152 INFO L87 Difference]: Start difference. First operand 50787 states and 190555 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:21,526 INFO L93 Difference]: Finished difference Result 100609 states and 369514 transitions. [2021-05-22 02:11:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:11:21,527 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:21,882 INFO L225 Difference]: With dead ends: 100609 [2021-05-22 02:11:21,882 INFO L226 Difference]: Without dead ends: 100210 [2021-05-22 02:11:21,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:11:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100210 states. [2021-05-22 02:11:23,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100210 to 73794. [2021-05-22 02:11:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73794 states, 73793 states have (on average 3.8082744975810714) internal successors, (281024), 73793 states have internal predecessors, (281024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73794 states to 73794 states and 281024 transitions. [2021-05-22 02:11:24,507 INFO L78 Accepts]: Start accepts. Automaton has 73794 states and 281024 transitions. Word has length 29 [2021-05-22 02:11:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:24,507 INFO L482 AbstractCegarLoop]: Abstraction has 73794 states and 281024 transitions. [2021-05-22 02:11:24,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 73794 states and 281024 transitions. [2021-05-22 02:11:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:24,640 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:24,640 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:24,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-22 02:11:24,842 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:24,842 INFO L82 PathProgramCache]: Analyzing trace with hash 471519794, now seen corresponding path program 100 times [2021-05-22 02:11:24,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:24,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395507226] [2021-05-22 02:11:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:24,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:24,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395507226] [2021-05-22 02:11:24,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395507226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:24,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835675453] [2021-05-22 02:11:24,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:24,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:11:24,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:24,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:24,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:11:24,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835675453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:24,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:24,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-22 02:11:24,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120135075] [2021-05-22 02:11:24,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:11:24,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:11:24,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:11:24,952 INFO L87 Difference]: Start difference. First operand 73794 states and 281024 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:26,583 INFO L93 Difference]: Finished difference Result 102298 states and 373018 transitions. [2021-05-22 02:11:26,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-22 02:11:26,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:26,923 INFO L225 Difference]: With dead ends: 102298 [2021-05-22 02:11:26,923 INFO L226 Difference]: Without dead ends: 101158 [2021-05-22 02:11:26,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=821, Invalid=2961, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:11:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101158 states. [2021-05-22 02:11:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101158 to 73287. [2021-05-22 02:11:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73287 states, 73286 states have (on average 3.7827825232650163) internal successors, (277225), 73286 states have internal predecessors, (277225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73287 states to 73287 states and 277225 transitions. [2021-05-22 02:11:29,587 INFO L78 Accepts]: Start accepts. Automaton has 73287 states and 277225 transitions. Word has length 29 [2021-05-22 02:11:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:29,587 INFO L482 AbstractCegarLoop]: Abstraction has 73287 states and 277225 transitions. [2021-05-22 02:11:29,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 73287 states and 277225 transitions. [2021-05-22 02:11:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:29,706 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:29,706 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:29,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:29,907 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:29,907 INFO L82 PathProgramCache]: Analyzing trace with hash 353639198, now seen corresponding path program 101 times [2021-05-22 02:11:29,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:29,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856937774] [2021-05-22 02:11:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:29,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:29,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856937774] [2021-05-22 02:11:29,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856937774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:29,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303796178] [2021-05-22 02:11:29,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:29,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:11:29,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:29,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:30,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303796178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:30,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:30,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-22 02:11:30,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176005797] [2021-05-22 02:11:30,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:11:30,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:11:30,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:11:30,012 INFO L87 Difference]: Start difference. First operand 73287 states and 277225 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:30,480 INFO L93 Difference]: Finished difference Result 82707 states and 304326 transitions. [2021-05-22 02:11:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:11:30,481 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:30,711 INFO L225 Difference]: With dead ends: 82707 [2021-05-22 02:11:30,711 INFO L226 Difference]: Without dead ends: 82617 [2021-05-22 02:11:30,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:11:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82617 states. [2021-05-22 02:11:32,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82617 to 73144. [2021-05-22 02:11:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73144 states, 73143 states have (on average 3.754234855010049) internal successors, (274596), 73143 states have internal predecessors, (274596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73144 states to 73144 states and 274596 transitions. [2021-05-22 02:11:32,766 INFO L78 Accepts]: Start accepts. Automaton has 73144 states and 274596 transitions. Word has length 29 [2021-05-22 02:11:32,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:32,766 INFO L482 AbstractCegarLoop]: Abstraction has 73144 states and 274596 transitions. [2021-05-22 02:11:32,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:32,766 INFO L276 IsEmpty]: Start isEmpty. Operand 73144 states and 274596 transitions. [2021-05-22 02:11:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:32,875 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:32,875 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:33,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:33,076 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:33,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1372869486, now seen corresponding path program 102 times [2021-05-22 02:11:33,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:33,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089812913] [2021-05-22 02:11:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:33,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:33,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089812913] [2021-05-22 02:11:33,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089812913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:33,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738907652] [2021-05-22 02:11:33,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:33,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:11:33,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:33,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:33,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:11:33,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738907652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:33,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:33,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-22 02:11:33,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792776243] [2021-05-22 02:11:33,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:11:33,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:33,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:11:33,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:11:33,212 INFO L87 Difference]: Start difference. First operand 73144 states and 274596 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:34,806 INFO L93 Difference]: Finished difference Result 90454 states and 327992 transitions. [2021-05-22 02:11:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-22 02:11:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:35,056 INFO L225 Difference]: With dead ends: 90454 [2021-05-22 02:11:35,056 INFO L226 Difference]: Without dead ends: 89724 [2021-05-22 02:11:35,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 547.1ms TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2021-05-22 02:11:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89724 states. [2021-05-22 02:11:36,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89724 to 72523. [2021-05-22 02:11:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72523 states, 72522 states have (on average 3.7569427208295414) internal successors, (272461), 72522 states have internal predecessors, (272461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72523 states to 72523 states and 272461 transitions. [2021-05-22 02:11:37,334 INFO L78 Accepts]: Start accepts. Automaton has 72523 states and 272461 transitions. Word has length 29 [2021-05-22 02:11:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:37,335 INFO L482 AbstractCegarLoop]: Abstraction has 72523 states and 272461 transitions. [2021-05-22 02:11:37,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 72523 states and 272461 transitions. [2021-05-22 02:11:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:37,525 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:37,525 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:37,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-05-22 02:11:37,726 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:37,726 INFO L82 PathProgramCache]: Analyzing trace with hash 351112822, now seen corresponding path program 103 times [2021-05-22 02:11:37,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:37,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026549979] [2021-05-22 02:11:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:37,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:37,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026549979] [2021-05-22 02:11:37,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026549979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:37,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639364994] [2021-05-22 02:11:37,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:37,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:37,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:11:37,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639364994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:37,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:37,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-22 02:11:37,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275633930] [2021-05-22 02:11:37,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:11:37,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:37,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:11:37,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:11:37,805 INFO L87 Difference]: Start difference. First operand 72523 states and 272461 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:38,265 INFO L93 Difference]: Finished difference Result 85882 states and 320374 transitions. [2021-05-22 02:11:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:11:38,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:38,497 INFO L225 Difference]: With dead ends: 85882 [2021-05-22 02:11:38,498 INFO L226 Difference]: Without dead ends: 85852 [2021-05-22 02:11:38,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:11:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85852 states. [2021-05-22 02:11:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85852 to 81497. [2021-05-22 02:11:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81497 states, 81496 states have (on average 3.7722342200844214) internal successors, (307422), 81496 states have internal predecessors, (307422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81497 states to 81497 states and 307422 transitions. [2021-05-22 02:11:40,801 INFO L78 Accepts]: Start accepts. Automaton has 81497 states and 307422 transitions. Word has length 29 [2021-05-22 02:11:40,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:40,801 INFO L482 AbstractCegarLoop]: Abstraction has 81497 states and 307422 transitions. [2021-05-22 02:11:40,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 81497 states and 307422 transitions. [2021-05-22 02:11:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:40,951 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:40,951 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:41,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-22 02:11:41,152 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:41,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1495713142, now seen corresponding path program 104 times [2021-05-22 02:11:41,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:41,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348284765] [2021-05-22 02:11:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:41,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:41,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348284765] [2021-05-22 02:11:41,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348284765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:41,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919423110] [2021-05-22 02:11:41,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:41,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:11:41,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:41,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:11:41,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919423110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:41,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:41,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-22 02:11:41,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540003955] [2021-05-22 02:11:41,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:11:41,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:41,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:11:41,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:11:41,242 INFO L87 Difference]: Start difference. First operand 81497 states and 307422 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:41,709 INFO L93 Difference]: Finished difference Result 90964 states and 338142 transitions. [2021-05-22 02:11:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:11:41,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:41,944 INFO L225 Difference]: With dead ends: 90964 [2021-05-22 02:11:41,944 INFO L226 Difference]: Without dead ends: 90951 [2021-05-22 02:11:41,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:11:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90951 states. [2021-05-22 02:11:43,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90951 to 81689. [2021-05-22 02:11:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81689 states, 81688 states have (on average 3.771067965919107) internal successors, (308051), 81688 states have internal predecessors, (308051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81689 states to 81689 states and 308051 transitions. [2021-05-22 02:11:44,295 INFO L78 Accepts]: Start accepts. Automaton has 81689 states and 308051 transitions. Word has length 29 [2021-05-22 02:11:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:44,295 INFO L482 AbstractCegarLoop]: Abstraction has 81689 states and 308051 transitions. [2021-05-22 02:11:44,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 81689 states and 308051 transitions. [2021-05-22 02:11:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:44,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:44,423 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:44,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:44,623 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:44,623 INFO L82 PathProgramCache]: Analyzing trace with hash 22394150, now seen corresponding path program 105 times [2021-05-22 02:11:44,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:44,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797514376] [2021-05-22 02:11:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:11:44,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797514376] [2021-05-22 02:11:44,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797514376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996334053] [2021-05-22 02:11:44,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:44,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:11:44,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:44,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:44,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:44,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996334053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:44,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:44,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:11:44,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412726905] [2021-05-22 02:11:44,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:11:44,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:44,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:11:44,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:11:44,732 INFO L87 Difference]: Start difference. First operand 81689 states and 308051 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:46,537 INFO L93 Difference]: Finished difference Result 117029 states and 423344 transitions. [2021-05-22 02:11:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:11:46,538 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:46,904 INFO L225 Difference]: With dead ends: 117029 [2021-05-22 02:11:46,904 INFO L226 Difference]: Without dead ends: 116821 [2021-05-22 02:11:46,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=957, Invalid=3873, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:11:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116821 states. [2021-05-22 02:11:49,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116821 to 82052. [2021-05-22 02:11:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82052 states, 82051 states have (on average 3.7600882378033176) internal successors, (308519), 82051 states have internal predecessors, (308519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82052 states to 82052 states and 308519 transitions. [2021-05-22 02:11:49,744 INFO L78 Accepts]: Start accepts. Automaton has 82052 states and 308519 transitions. Word has length 29 [2021-05-22 02:11:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:49,744 INFO L482 AbstractCegarLoop]: Abstraction has 82052 states and 308519 transitions. [2021-05-22 02:11:49,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 82052 states and 308519 transitions. [2021-05-22 02:11:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:49,877 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:49,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:50,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-22 02:11:50,077 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:50,077 INFO L82 PathProgramCache]: Analyzing trace with hash 954640786, now seen corresponding path program 106 times [2021-05-22 02:11:50,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:50,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134929590] [2021-05-22 02:11:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:50,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:50,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134929590] [2021-05-22 02:11:50,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134929590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:50,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382022453] [2021-05-22 02:11:50,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:50,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:11:50,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:50,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:50,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:11:50,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382022453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:50,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:50,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-22 02:11:50,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836958960] [2021-05-22 02:11:50,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:11:50,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:50,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:11:50,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:11:50,183 INFO L87 Difference]: Start difference. First operand 82052 states and 308519 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:50,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:50,706 INFO L93 Difference]: Finished difference Result 86807 states and 321949 transitions. [2021-05-22 02:11:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:11:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:51,543 INFO L225 Difference]: With dead ends: 86807 [2021-05-22 02:11:51,543 INFO L226 Difference]: Without dead ends: 86624 [2021-05-22 02:11:51,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:11:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86624 states. [2021-05-22 02:11:52,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86624 to 81742. [2021-05-22 02:11:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81742 states, 81741 states have (on average 3.760120380225346) internal successors, (307356), 81741 states have internal predecessors, (307356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81742 states to 81742 states and 307356 transitions. [2021-05-22 02:11:53,349 INFO L78 Accepts]: Start accepts. Automaton has 81742 states and 307356 transitions. Word has length 29 [2021-05-22 02:11:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:53,349 INFO L482 AbstractCegarLoop]: Abstraction has 81742 states and 307356 transitions. [2021-05-22 02:11:53,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 81742 states and 307356 transitions. [2021-05-22 02:11:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:53,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:53,484 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:53,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-22 02:11:53,685 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:53,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:53,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1306191286, now seen corresponding path program 107 times [2021-05-22 02:11:53,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:53,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065789669] [2021-05-22 02:11:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:53,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:53,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065789669] [2021-05-22 02:11:53,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065789669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:53,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352683032] [2021-05-22 02:11:53,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:53,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:11:53,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:53,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:53,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:53,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352683032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:53,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:53,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-22 02:11:53,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540565249] [2021-05-22 02:11:53,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:11:53,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:11:53,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:11:53,810 INFO L87 Difference]: Start difference. First operand 81742 states and 307356 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:55,135 INFO L93 Difference]: Finished difference Result 105120 states and 389933 transitions. [2021-05-22 02:11:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:11:55,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:11:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:55,493 INFO L225 Difference]: With dead ends: 105120 [2021-05-22 02:11:55,493 INFO L226 Difference]: Without dead ends: 104966 [2021-05-22 02:11:55,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:11:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104966 states. [2021-05-22 02:11:57,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104966 to 90971. [2021-05-22 02:11:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90971 states, 90970 states have (on average 3.763823238430252) internal successors, (342395), 90970 states have internal predecessors, (342395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90971 states to 90971 states and 342395 transitions. [2021-05-22 02:11:58,325 INFO L78 Accepts]: Start accepts. Automaton has 90971 states and 342395 transitions. Word has length 29 [2021-05-22 02:11:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:58,325 INFO L482 AbstractCegarLoop]: Abstraction has 90971 states and 342395 transitions. [2021-05-22 02:11:58,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 90971 states and 342395 transitions. [2021-05-22 02:11:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:11:58,490 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:58,490 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:58,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-22 02:11:58,691 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash -136054070, now seen corresponding path program 108 times [2021-05-22 02:11:58,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:58,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50733216] [2021-05-22 02:11:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:58,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:58,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50733216] [2021-05-22 02:11:58,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50733216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:58,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695125586] [2021-05-22 02:11:58,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:58,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:11:58,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:58,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:11:58,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:11:58,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695125586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:58,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:58,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-05-22 02:11:58,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482458070] [2021-05-22 02:11:58,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:11:58,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:58,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:11:58,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:11:58,813 INFO L87 Difference]: Start difference. First operand 90971 states and 342395 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:00,703 INFO L93 Difference]: Finished difference Result 124333 states and 441738 transitions. [2021-05-22 02:12:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-22 02:12:00,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:12:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:01,051 INFO L225 Difference]: With dead ends: 124333 [2021-05-22 02:12:01,051 INFO L226 Difference]: Without dead ends: 124126 [2021-05-22 02:12:01,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 644.2ms TimeCoverageRelationStatistics Valid=1215, Invalid=4335, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:12:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124126 states. [2021-05-22 02:12:02,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124126 to 81617. [2021-05-22 02:12:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81617 states, 81616 states have (on average 3.7307023132719075) internal successors, (304485), 81616 states have internal predecessors, (304485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81617 states to 81617 states and 304485 transitions. [2021-05-22 02:12:03,848 INFO L78 Accepts]: Start accepts. Automaton has 81617 states and 304485 transitions. Word has length 29 [2021-05-22 02:12:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:03,849 INFO L482 AbstractCegarLoop]: Abstraction has 81617 states and 304485 transitions. [2021-05-22 02:12:03,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 81617 states and 304485 transitions. [2021-05-22 02:12:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:12:04,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:04,004 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:04,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:04,213 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:04,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2042862942, now seen corresponding path program 109 times [2021-05-22 02:12:04,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:04,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146660208] [2021-05-22 02:12:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:04,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:04,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146660208] [2021-05-22 02:12:04,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146660208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:04,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088576092] [2021-05-22 02:12:04,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:04,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:12:04,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:12:04,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088576092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:04,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:04,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-05-22 02:12:04,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970232397] [2021-05-22 02:12:04,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:12:04,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:12:04,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:12:04,304 INFO L87 Difference]: Start difference. First operand 81617 states and 304485 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:04,893 INFO L93 Difference]: Finished difference Result 104858 states and 384069 transitions. [2021-05-22 02:12:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:12:04,893 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:12:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:05,201 INFO L225 Difference]: With dead ends: 104858 [2021-05-22 02:12:05,201 INFO L226 Difference]: Without dead ends: 104830 [2021-05-22 02:12:05,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:12:05,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104830 states. [2021-05-22 02:12:07,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104830 to 80598. [2021-05-22 02:12:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80598 states, 80597 states have (on average 3.718897725721801) internal successors, (299732), 80597 states have internal predecessors, (299732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80598 states to 80598 states and 299732 transitions. [2021-05-22 02:12:07,757 INFO L78 Accepts]: Start accepts. Automaton has 80598 states and 299732 transitions. Word has length 29 [2021-05-22 02:12:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:07,757 INFO L482 AbstractCegarLoop]: Abstraction has 80598 states and 299732 transitions. [2021-05-22 02:12:07,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 80598 states and 299732 transitions. [2021-05-22 02:12:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:12:07,893 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:07,893 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:08,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-22 02:12:08,115 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:08,115 INFO L82 PathProgramCache]: Analyzing trace with hash 99679966, now seen corresponding path program 110 times [2021-05-22 02:12:08,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:08,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651797507] [2021-05-22 02:12:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:08,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:08,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651797507] [2021-05-22 02:12:08,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651797507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:08,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589597787] [2021-05-22 02:12:08,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:08,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:12:08,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:08,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:12:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-22 02:12:08,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589597787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:08,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:08,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-22 02:12:08,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357340306] [2021-05-22 02:12:08,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:12:08,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:08,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:12:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:12:08,229 INFO L87 Difference]: Start difference. First operand 80598 states and 299732 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:10,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:10,425 INFO L93 Difference]: Finished difference Result 120372 states and 431223 transitions. [2021-05-22 02:12:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:12:10,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:12:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:10,955 INFO L225 Difference]: With dead ends: 120372 [2021-05-22 02:12:10,955 INFO L226 Difference]: Without dead ends: 120022 [2021-05-22 02:12:10,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=699, Invalid=2493, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:12:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120022 states. [2021-05-22 02:12:13,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120022 to 96150. [2021-05-22 02:12:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96150 states, 96149 states have (on average 3.740330112637677) internal successors, (359629), 96149 states have internal predecessors, (359629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96150 states to 96150 states and 359629 transitions. [2021-05-22 02:12:13,956 INFO L78 Accepts]: Start accepts. Automaton has 96150 states and 359629 transitions. Word has length 29 [2021-05-22 02:12:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:13,957 INFO L482 AbstractCegarLoop]: Abstraction has 96150 states and 359629 transitions. [2021-05-22 02:12:13,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:13,957 INFO L276 IsEmpty]: Start isEmpty. Operand 96150 states and 359629 transitions. [2021-05-22 02:12:14,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:12:14,115 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:14,115 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:14,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-22 02:12:14,316 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:14,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1163429594, now seen corresponding path program 111 times [2021-05-22 02:12:14,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:14,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890121427] [2021-05-22 02:12:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:14,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:14,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890121427] [2021-05-22 02:12:14,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890121427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:14,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125563248] [2021-05-22 02:12:14,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:14,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:12:14,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:14,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:12:14,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 02:12:14,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125563248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:14,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:14,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-22 02:12:14,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253869695] [2021-05-22 02:12:14,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:12:14,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:14,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:12:14,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:12:14,426 INFO L87 Difference]: Start difference. First operand 96150 states and 359629 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:16,369 INFO L93 Difference]: Finished difference Result 158751 states and 577161 transitions. [2021-05-22 02:12:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-22 02:12:16,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:12:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:16,854 INFO L225 Difference]: With dead ends: 158751 [2021-05-22 02:12:16,855 INFO L226 Difference]: Without dead ends: 157945 [2021-05-22 02:12:16,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 456.6ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:12:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157945 states. [2021-05-22 02:12:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157945 to 113836. [2021-05-22 02:12:19,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113836 states, 113835 states have (on average 3.7557693152369658) internal successors, (427538), 113835 states have internal predecessors, (427538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113836 states to 113836 states and 427538 transitions. [2021-05-22 02:12:20,128 INFO L78 Accepts]: Start accepts. Automaton has 113836 states and 427538 transitions. Word has length 29 [2021-05-22 02:12:20,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:20,128 INFO L482 AbstractCegarLoop]: Abstraction has 113836 states and 427538 transitions. [2021-05-22 02:12:20,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:20,128 INFO L276 IsEmpty]: Start isEmpty. Operand 113836 states and 427538 transitions. [2021-05-22 02:12:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:12:20,306 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:20,306 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:20,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:20,507 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:20,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1318670174, now seen corresponding path program 112 times [2021-05-22 02:12:20,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:20,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854305412] [2021-05-22 02:12:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:12:20,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:20,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854305412] [2021-05-22 02:12:20,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854305412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:20,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227492746] [2021-05-22 02:12:20,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:20,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:12:20,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:20,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:12:20,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:12:20,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227492746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:20,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:20,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-22 02:12:20,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855187206] [2021-05-22 02:12:20,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:12:20,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:20,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:12:20,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:12:20,588 INFO L87 Difference]: Start difference. First operand 113836 states and 427538 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:21,857 INFO L93 Difference]: Finished difference Result 124805 states and 462681 transitions. [2021-05-22 02:12:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:12:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:12:21,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:22,245 INFO L225 Difference]: With dead ends: 124805 [2021-05-22 02:12:22,245 INFO L226 Difference]: Without dead ends: 124469 [2021-05-22 02:12:22,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:12:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124469 states. [2021-05-22 02:12:24,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124469 to 117136. [2021-05-22 02:12:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117136 states, 117135 states have (on average 3.760541255815939) internal successors, (440491), 117135 states have internal predecessors, (440491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117136 states to 117136 states and 440491 transitions. [2021-05-22 02:12:25,395 INFO L78 Accepts]: Start accepts. Automaton has 117136 states and 440491 transitions. Word has length 29 [2021-05-22 02:12:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:25,396 INFO L482 AbstractCegarLoop]: Abstraction has 117136 states and 440491 transitions. [2021-05-22 02:12:25,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 117136 states and 440491 transitions. [2021-05-22 02:12:25,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:12:25,579 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:25,579 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:25,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:25,780 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:25,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash -190689630, now seen corresponding path program 113 times [2021-05-22 02:12:25,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:25,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757395970] [2021-05-22 02:12:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:12:25,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:25,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757395970] [2021-05-22 02:12:25,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757395970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:25,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058742147] [2021-05-22 02:12:25,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:25,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:12:25,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:12:25,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:12:25,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058742147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:25,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:25,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-22 02:12:25,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890856163] [2021-05-22 02:12:25,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:12:25,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:25,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:12:25,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:12:25,869 INFO L87 Difference]: Start difference. First operand 117136 states and 440491 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:27,150 INFO L93 Difference]: Finished difference Result 131593 states and 486537 transitions. [2021-05-22 02:12:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:12:27,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:12:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:27,563 INFO L225 Difference]: With dead ends: 131593 [2021-05-22 02:12:27,563 INFO L226 Difference]: Without dead ends: 131578 [2021-05-22 02:12:27,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:12:27,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131578 states. [2021-05-22 02:12:30,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131578 to 118035. [2021-05-22 02:12:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118035 states, 118034 states have (on average 3.757493603537964) internal successors, (443512), 118034 states have internal predecessors, (443512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118035 states to 118035 states and 443512 transitions. [2021-05-22 02:12:30,750 INFO L78 Accepts]: Start accepts. Automaton has 118035 states and 443512 transitions. Word has length 29 [2021-05-22 02:12:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:30,750 INFO L482 AbstractCegarLoop]: Abstraction has 118035 states and 443512 transitions. [2021-05-22 02:12:30,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 118035 states and 443512 transitions. [2021-05-22 02:12:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:12:30,927 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:30,927 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:31,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:31,127 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:31,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:31,128 INFO L82 PathProgramCache]: Analyzing trace with hash 68105694, now seen corresponding path program 114 times [2021-05-22 02:12:31,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:31,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696880444] [2021-05-22 02:12:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:12:31,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:31,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696880444] [2021-05-22 02:12:31,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696880444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:31,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211103863] [2021-05-22 02:12:31,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:31,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:12:31,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:31,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:12:31,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:12:31,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211103863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:31,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:31,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-22 02:12:31,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69158269] [2021-05-22 02:12:31,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:12:31,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:31,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:12:31,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:12:31,252 INFO L87 Difference]: Start difference. First operand 118035 states and 443512 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:33,565 INFO L93 Difference]: Finished difference Result 162417 states and 578150 transitions. [2021-05-22 02:12:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-22 02:12:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:12:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:34,632 INFO L225 Difference]: With dead ends: 162417 [2021-05-22 02:12:34,632 INFO L226 Difference]: Without dead ends: 162210 [2021-05-22 02:12:34,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 1232.9ms TimeCoverageRelationStatistics Valid=1397, Invalid=4609, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 02:12:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162210 states. [2021-05-22 02:12:37,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162210 to 119675. [2021-05-22 02:12:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119675 states, 119674 states have (on average 3.739550779617962) internal successors, (447527), 119674 states have internal predecessors, (447527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119675 states to 119675 states and 447527 transitions. [2021-05-22 02:12:37,978 INFO L78 Accepts]: Start accepts. Automaton has 119675 states and 447527 transitions. Word has length 29 [2021-05-22 02:12:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:37,978 INFO L482 AbstractCegarLoop]: Abstraction has 119675 states and 447527 transitions. [2021-05-22 02:12:37,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 119675 states and 447527 transitions. [2021-05-22 02:12:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:12:38,154 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:38,154 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:38,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:38,354 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:38,355 INFO L82 PathProgramCache]: Analyzing trace with hash 218777654, now seen corresponding path program 115 times [2021-05-22 02:12:38,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:38,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740198162] [2021-05-22 02:12:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:12:38,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:38,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740198162] [2021-05-22 02:12:38,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740198162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:38,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815136975] [2021-05-22 02:12:38,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:38,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:12:38,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:12:38,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815136975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:38,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:38,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-22 02:12:38,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546653358] [2021-05-22 02:12:38,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:12:38,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:38,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:12:38,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:12:38,438 INFO L87 Difference]: Start difference. First operand 119675 states and 447527 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:39,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:39,709 INFO L93 Difference]: Finished difference Result 135149 states and 501662 transitions. [2021-05-22 02:12:39,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:12:39,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:12:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:40,091 INFO L225 Difference]: With dead ends: 135149 [2021-05-22 02:12:40,091 INFO L226 Difference]: Without dead ends: 135117 [2021-05-22 02:12:40,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:12:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135117 states. [2021-05-22 02:12:42,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135117 to 129535. [2021-05-22 02:12:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129535 states, 129534 states have (on average 3.746946747572066) internal successors, (485357), 129534 states have internal predecessors, (485357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129535 states to 129535 states and 485357 transitions. [2021-05-22 02:12:43,182 INFO L78 Accepts]: Start accepts. Automaton has 129535 states and 485357 transitions. Word has length 29 [2021-05-22 02:12:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:43,183 INFO L482 AbstractCegarLoop]: Abstraction has 129535 states and 485357 transitions. [2021-05-22 02:12:43,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:43,183 INFO L276 IsEmpty]: Start isEmpty. Operand 129535 states and 485357 transitions. [2021-05-22 02:12:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:12:43,400 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:43,400 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:43,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-22 02:12:43,600 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash 512401842, now seen corresponding path program 116 times [2021-05-22 02:12:43,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:43,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073207358] [2021-05-22 02:12:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:12:43,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:43,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073207358] [2021-05-22 02:12:43,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073207358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:43,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716527539] [2021-05-22 02:12:43,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:43,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:12:43,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:43,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:12:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:12:43,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716527539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:43,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:43,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-22 02:12:43,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023748767] [2021-05-22 02:12:43,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:12:43,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:43,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:12:43,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:12:43,690 INFO L87 Difference]: Start difference. First operand 129535 states and 485357 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:45,130 INFO L93 Difference]: Finished difference Result 143528 states and 531160 transitions. [2021-05-22 02:12:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:12:45,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:12:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:45,581 INFO L225 Difference]: With dead ends: 143528 [2021-05-22 02:12:45,581 INFO L226 Difference]: Without dead ends: 143516 [2021-05-22 02:12:45,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:12:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143516 states. [2021-05-22 02:12:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143516 to 130136. [2021-05-22 02:12:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130136 states, 130135 states have (on average 3.7450416874783876) internal successors, (487361), 130135 states have internal predecessors, (487361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130136 states to 130136 states and 487361 transitions. [2021-05-22 02:12:49,711 INFO L78 Accepts]: Start accepts. Automaton has 130136 states and 487361 transitions. Word has length 29 [2021-05-22 02:12:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:49,711 INFO L482 AbstractCegarLoop]: Abstraction has 130136 states and 487361 transitions. [2021-05-22 02:12:49,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 130136 states and 487361 transitions. [2021-05-22 02:12:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:12:50,027 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:50,027 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:50,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-22 02:12:50,229 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash 677507946, now seen corresponding path program 117 times [2021-05-22 02:12:50,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:50,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478304216] [2021-05-22 02:12:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:50,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478304216] [2021-05-22 02:12:50,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478304216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653929188] [2021-05-22 02:12:50,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:50,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:12:50,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:50,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:12:50,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:12:50,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653929188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:50,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:50,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-22 02:12:50,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339085415] [2021-05-22 02:12:50,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:12:50,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:50,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:12:50,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:12:50,333 INFO L87 Difference]: Start difference. First operand 130136 states and 487361 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:51,571 INFO L93 Difference]: Finished difference Result 158841 states and 570866 transitions. [2021-05-22 02:12:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:12:51,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:12:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:52,772 INFO L225 Difference]: With dead ends: 158841 [2021-05-22 02:12:52,772 INFO L226 Difference]: Without dead ends: 158080 [2021-05-22 02:12:52,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:12:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158080 states. [2021-05-22 02:12:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158080 to 127564. [2021-05-22 02:12:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127564 states, 127563 states have (on average 3.7467839420521623) internal successors, (477951), 127563 states have internal predecessors, (477951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127564 states to 127564 states and 477951 transitions. [2021-05-22 02:12:56,113 INFO L78 Accepts]: Start accepts. Automaton has 127564 states and 477951 transitions. Word has length 29 [2021-05-22 02:12:56,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:56,113 INFO L482 AbstractCegarLoop]: Abstraction has 127564 states and 477951 transitions. [2021-05-22 02:12:56,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:56,114 INFO L276 IsEmpty]: Start isEmpty. Operand 127564 states and 477951 transitions. [2021-05-22 02:12:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:12:56,319 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:56,319 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:56,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-22 02:12:56,519 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:56,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2080726810, now seen corresponding path program 118 times [2021-05-22 02:12:56,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:56,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792358205] [2021-05-22 02:12:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:12:56,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:56,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792358205] [2021-05-22 02:12:56,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792358205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:56,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625441241] [2021-05-22 02:12:56,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:56,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:12:56,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:56,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:12:56,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:12:56,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625441241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:56,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:56,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-22 02:12:56,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709008670] [2021-05-22 02:12:56,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:12:56,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:56,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:12:56,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:12:56,603 INFO L87 Difference]: Start difference. First operand 127564 states and 477951 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:58,102 INFO L93 Difference]: Finished difference Result 144032 states and 532857 transitions. [2021-05-22 02:12:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:12:58,102 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:12:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:58,548 INFO L225 Difference]: With dead ends: 144032 [2021-05-22 02:12:58,548 INFO L226 Difference]: Without dead ends: 144002 [2021-05-22 02:12:58,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144002 states. [2021-05-22 02:13:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144002 to 129426. [2021-05-22 02:13:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129426 states, 129425 states have (on average 3.7404597257098704) internal successors, (484109), 129425 states have internal predecessors, (484109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129426 states to 129426 states and 484109 transitions. [2021-05-22 02:13:02,016 INFO L78 Accepts]: Start accepts. Automaton has 129426 states and 484109 transitions. Word has length 29 [2021-05-22 02:13:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:02,016 INFO L482 AbstractCegarLoop]: Abstraction has 129426 states and 484109 transitions. [2021-05-22 02:13:02,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 129426 states and 484109 transitions. [2021-05-22 02:13:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:13:02,882 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:02,882 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:03,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:03,083 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:03,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:03,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1305487906, now seen corresponding path program 119 times [2021-05-22 02:13:03,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:03,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533431123] [2021-05-22 02:13:03,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:03,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533431123] [2021-05-22 02:13:03,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533431123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:03,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486607871] [2021-05-22 02:13:03,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:03,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:13:03,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:03,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:13:03,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:13:03,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486607871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:03,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:03,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-22 02:13:03,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881228939] [2021-05-22 02:13:03,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:13:03,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:13:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:13:03,198 INFO L87 Difference]: Start difference. First operand 129426 states and 484109 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:04,010 INFO L93 Difference]: Finished difference Result 143204 states and 525770 transitions. [2021-05-22 02:13:04,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:13:04,010 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:13:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:04,466 INFO L225 Difference]: With dead ends: 143204 [2021-05-22 02:13:04,467 INFO L226 Difference]: Without dead ends: 143141 [2021-05-22 02:13:04,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:13:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143141 states. [2021-05-22 02:13:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143141 to 126464. [2021-05-22 02:13:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126464 states, 126463 states have (on average 3.727643658619517) internal successors, (471409), 126463 states have internal predecessors, (471409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126464 states to 126464 states and 471409 transitions. [2021-05-22 02:13:07,989 INFO L78 Accepts]: Start accepts. Automaton has 126464 states and 471409 transitions. Word has length 29 [2021-05-22 02:13:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:07,989 INFO L482 AbstractCegarLoop]: Abstraction has 126464 states and 471409 transitions. [2021-05-22 02:13:07,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 126464 states and 471409 transitions. [2021-05-22 02:13:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:13:09,241 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:09,241 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:09,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-22 02:13:09,457 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:09,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:09,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2110231202, now seen corresponding path program 120 times [2021-05-22 02:13:09,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:09,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574351979] [2021-05-22 02:13:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:13:09,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:09,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574351979] [2021-05-22 02:13:09,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574351979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:09,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837518295] [2021-05-22 02:13:09,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:09,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:13:09,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:09,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:13:09,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:13:09,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837518295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:09,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:09,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:13:09,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630992743] [2021-05-22 02:13:09,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:13:09,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:09,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:13:09,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:13:09,654 INFO L87 Difference]: Start difference. First operand 126464 states and 471409 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:11,785 INFO L93 Difference]: Finished difference Result 186865 states and 670831 transitions. [2021-05-22 02:13:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:13:11,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:13:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:12,800 INFO L225 Difference]: With dead ends: 186865 [2021-05-22 02:13:12,800 INFO L226 Difference]: Without dead ends: 186574 [2021-05-22 02:13:12,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 644.2ms TimeCoverageRelationStatistics Valid=946, Invalid=3086, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:13:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186574 states. [2021-05-22 02:13:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186574 to 129576. [2021-05-22 02:13:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129576 states, 129575 states have (on average 3.7100983986108433) internal successors, (480736), 129575 states have internal predecessors, (480736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129576 states to 129576 states and 480736 transitions. [2021-05-22 02:13:16,545 INFO L78 Accepts]: Start accepts. Automaton has 129576 states and 480736 transitions. Word has length 29 [2021-05-22 02:13:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:16,545 INFO L482 AbstractCegarLoop]: Abstraction has 129576 states and 480736 transitions. [2021-05-22 02:13:16,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 129576 states and 480736 transitions. [2021-05-22 02:13:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:13:16,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:16,771 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:16,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:16,971 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:16,972 INFO L82 PathProgramCache]: Analyzing trace with hash 733832030, now seen corresponding path program 121 times [2021-05-22 02:13:16,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:16,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326518524] [2021-05-22 02:13:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:13:16,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:16,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326518524] [2021-05-22 02:13:16,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326518524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:16,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115033826] [2021-05-22 02:13:16,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:13:17,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:13:17,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115033826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:17,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:17,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:13:17,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92766212] [2021-05-22 02:13:17,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:13:17,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:17,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:13:17,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:13:17,059 INFO L87 Difference]: Start difference. First operand 129576 states and 480736 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:18,616 INFO L93 Difference]: Finished difference Result 140798 states and 513511 transitions. [2021-05-22 02:13:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:13:18,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:13:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:19,093 INFO L225 Difference]: With dead ends: 140798 [2021-05-22 02:13:19,093 INFO L226 Difference]: Without dead ends: 140342 [2021-05-22 02:13:19,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:13:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140342 states. [2021-05-22 02:13:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140342 to 130720. [2021-05-22 02:13:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130720 states, 130719 states have (on average 3.7030959539164163) internal successors, (484065), 130719 states have internal predecessors, (484065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130720 states to 130720 states and 484065 transitions. [2021-05-22 02:13:22,561 INFO L78 Accepts]: Start accepts. Automaton has 130720 states and 484065 transitions. Word has length 29 [2021-05-22 02:13:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:22,561 INFO L482 AbstractCegarLoop]: Abstraction has 130720 states and 484065 transitions. [2021-05-22 02:13:22,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 130720 states and 484065 transitions. [2021-05-22 02:13:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:13:23,457 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:23,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:23,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-22 02:13:23,677 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:23,677 INFO L82 PathProgramCache]: Analyzing trace with hash 565779372, now seen corresponding path program 122 times [2021-05-22 02:13:23,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:23,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295583687] [2021-05-22 02:13:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:23,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:23,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295583687] [2021-05-22 02:13:23,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295583687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:23,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029127145] [2021-05-22 02:13:23,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:23,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:13:23,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:23,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:13:23,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:24,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029127145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:24,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:24,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:13:24,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526050376] [2021-05-22 02:13:24,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:13:24,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:24,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:13:24,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:13:24,128 INFO L87 Difference]: Start difference. First operand 130720 states and 484065 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:25,207 INFO L93 Difference]: Finished difference Result 130957 states and 484770 transitions. [2021-05-22 02:13:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:13:25,207 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:13:25,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:25,616 INFO L225 Difference]: With dead ends: 130957 [2021-05-22 02:13:25,616 INFO L226 Difference]: Without dead ends: 130942 [2021-05-22 02:13:25,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:13:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130942 states. [2021-05-22 02:13:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130942 to 130808. [2021-05-22 02:13:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130808 states, 130807 states have (on average 3.702852293837486) internal successors, (484359), 130807 states have internal predecessors, (484359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130808 states to 130808 states and 484359 transitions. [2021-05-22 02:13:29,484 INFO L78 Accepts]: Start accepts. Automaton has 130808 states and 484359 transitions. Word has length 33 [2021-05-22 02:13:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:29,484 INFO L482 AbstractCegarLoop]: Abstraction has 130808 states and 484359 transitions. [2021-05-22 02:13:29,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 130808 states and 484359 transitions. [2021-05-22 02:13:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:13:29,843 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:29,843 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:30,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:30,043 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:30,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:30,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1661708648, now seen corresponding path program 123 times [2021-05-22 02:13:30,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:30,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114466925] [2021-05-22 02:13:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:30,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:30,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114466925] [2021-05-22 02:13:30,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114466925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:30,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917056578] [2021-05-22 02:13:30,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:30,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:13:30,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:13:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:30,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917056578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:30,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:30,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:13:30,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119845186] [2021-05-22 02:13:30,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:13:30,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:30,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:13:30,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:13:30,483 INFO L87 Difference]: Start difference. First operand 130808 states and 484359 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:32,256 INFO L93 Difference]: Finished difference Result 131223 states and 485558 transitions. [2021-05-22 02:13:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:13:32,257 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:13:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:32,756 INFO L225 Difference]: With dead ends: 131223 [2021-05-22 02:13:32,756 INFO L226 Difference]: Without dead ends: 131110 [2021-05-22 02:13:32,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:13:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131110 states. [2021-05-22 02:13:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131110 to 130915. [2021-05-22 02:13:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130915 states, 130914 states have (on average 3.7024840735139097) internal successors, (484707), 130914 states have internal predecessors, (484707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130915 states to 130915 states and 484707 transitions. [2021-05-22 02:13:36,115 INFO L78 Accepts]: Start accepts. Automaton has 130915 states and 484707 transitions. Word has length 33 [2021-05-22 02:13:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:36,115 INFO L482 AbstractCegarLoop]: Abstraction has 130915 states and 484707 transitions. [2021-05-22 02:13:36,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 130915 states and 484707 transitions. [2021-05-22 02:13:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:13:36,371 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:36,371 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:36,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-05-22 02:13:36,573 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:36,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:36,573 INFO L82 PathProgramCache]: Analyzing trace with hash 262334044, now seen corresponding path program 124 times [2021-05-22 02:13:36,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:36,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576913756] [2021-05-22 02:13:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:36,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:36,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576913756] [2021-05-22 02:13:36,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576913756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:36,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004812740] [2021-05-22 02:13:36,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:36,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:13:36,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:13:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:36,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004812740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:36,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:36,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:13:36,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432119599] [2021-05-22 02:13:36,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:13:36,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:36,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:13:36,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:13:36,999 INFO L87 Difference]: Start difference. First operand 130915 states and 484707 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:38,724 INFO L93 Difference]: Finished difference Result 131397 states and 486090 transitions. [2021-05-22 02:13:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:13:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:13:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:39,171 INFO L225 Difference]: With dead ends: 131397 [2021-05-22 02:13:39,171 INFO L226 Difference]: Without dead ends: 131308 [2021-05-22 02:13:39,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:13:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-05-22 02:13:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131025. [2021-05-22 02:13:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131025 states, 131024 states have (on average 3.7022224935889607) internal successors, (485080), 131024 states have internal predecessors, (485080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131025 states to 131025 states and 485080 transitions. [2021-05-22 02:13:42,177 INFO L78 Accepts]: Start accepts. Automaton has 131025 states and 485080 transitions. Word has length 33 [2021-05-22 02:13:42,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:42,177 INFO L482 AbstractCegarLoop]: Abstraction has 131025 states and 485080 transitions. [2021-05-22 02:13:42,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 131025 states and 485080 transitions. [2021-05-22 02:13:42,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:13:42,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:42,443 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:42,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:42,644 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1720019168, now seen corresponding path program 125 times [2021-05-22 02:13:42,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:42,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522783466] [2021-05-22 02:13:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:42,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:42,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522783466] [2021-05-22 02:13:42,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522783466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:42,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887527282] [2021-05-22 02:13:42,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:42,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:13:42,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:13:42,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:42,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887527282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:42,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:42,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:13:42,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583865298] [2021-05-22 02:13:42,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:13:42,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:42,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:13:42,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:13:42,993 INFO L87 Difference]: Start difference. First operand 131025 states and 485080 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:44,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:44,796 INFO L93 Difference]: Finished difference Result 131417 states and 486203 transitions. [2021-05-22 02:13:44,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:13:44,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:13:44,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:45,224 INFO L225 Difference]: With dead ends: 131417 [2021-05-22 02:13:45,225 INFO L226 Difference]: Without dead ends: 131387 [2021-05-22 02:13:45,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 984.6ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:13:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131387 states. [2021-05-22 02:13:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131387 to 131100. [2021-05-22 02:13:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131100 states, 131099 states have (on average 3.70232419774369) internal successors, (485371), 131099 states have internal predecessors, (485371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131100 states to 131100 states and 485371 transitions. [2021-05-22 02:13:48,535 INFO L78 Accepts]: Start accepts. Automaton has 131100 states and 485371 transitions. Word has length 33 [2021-05-22 02:13:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:48,535 INFO L482 AbstractCegarLoop]: Abstraction has 131100 states and 485371 transitions. [2021-05-22 02:13:48,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 131100 states and 485371 transitions. [2021-05-22 02:13:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:13:49,586 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:49,586 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:49,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-22 02:13:49,801 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash -168976428, now seen corresponding path program 126 times [2021-05-22 02:13:49,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:49,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398552860] [2021-05-22 02:13:49,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:49,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:49,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398552860] [2021-05-22 02:13:49,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398552860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:49,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449497585] [2021-05-22 02:13:49,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:49,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:13:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:13:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:50,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449497585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:50,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:50,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:13:50,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502385056] [2021-05-22 02:13:50,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:13:50,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:50,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:13:50,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:13:50,170 INFO L87 Difference]: Start difference. First operand 131100 states and 485371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:51,227 INFO L93 Difference]: Finished difference Result 131430 states and 486305 transitions. [2021-05-22 02:13:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:13:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:13:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:52,308 INFO L225 Difference]: With dead ends: 131430 [2021-05-22 02:13:52,308 INFO L226 Difference]: Without dead ends: 131346 [2021-05-22 02:13:52,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 334.9ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:13:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131346 states. [2021-05-22 02:13:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131346 to 131132. [2021-05-22 02:13:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131132 states, 131131 states have (on average 3.7021528090230382) internal successors, (485467), 131131 states have internal predecessors, (485467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131132 states to 131132 states and 485467 transitions. [2021-05-22 02:13:55,766 INFO L78 Accepts]: Start accepts. Automaton has 131132 states and 485467 transitions. Word has length 33 [2021-05-22 02:13:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:55,766 INFO L482 AbstractCegarLoop]: Abstraction has 131132 states and 485467 transitions. [2021-05-22 02:13:55,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand 131132 states and 485467 transitions. [2021-05-22 02:13:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:13:56,087 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:56,087 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:56,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-22 02:13:56,288 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1755066264, now seen corresponding path program 127 times [2021-05-22 02:13:56,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:56,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340065192] [2021-05-22 02:13:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:56,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:56,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340065192] [2021-05-22 02:13:56,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340065192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:56,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045814573] [2021-05-22 02:13:56,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:56,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:13:56,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:56,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045814573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:56,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:56,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:13:56,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466932550] [2021-05-22 02:13:56,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:13:56,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:56,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:13:56,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:13:56,697 INFO L87 Difference]: Start difference. First operand 131132 states and 485467 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:58,391 INFO L93 Difference]: Finished difference Result 131646 states and 486891 transitions. [2021-05-22 02:13:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:13:58,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:13:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:58,854 INFO L225 Difference]: With dead ends: 131646 [2021-05-22 02:13:58,854 INFO L226 Difference]: Without dead ends: 131557 [2021-05-22 02:13:58,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:13:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131557 states. [2021-05-22 02:14:01,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131557 to 131193. [2021-05-22 02:14:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131193 states, 131192 states have (on average 3.7020778706018658) internal successors, (485683), 131192 states have internal predecessors, (485683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131193 states to 131193 states and 485683 transitions. [2021-05-22 02:14:02,137 INFO L78 Accepts]: Start accepts. Automaton has 131193 states and 485683 transitions. Word has length 33 [2021-05-22 02:14:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:02,137 INFO L482 AbstractCegarLoop]: Abstraction has 131193 states and 485683 transitions. [2021-05-22 02:14:02,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 131193 states and 485683 transitions. [2021-05-22 02:14:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:14:02,404 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:14:02,404 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:14:02,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-22 02:14:02,605 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:14:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:14:02,605 INFO L82 PathProgramCache]: Analyzing trace with hash -227286948, now seen corresponding path program 128 times [2021-05-22 02:14:02,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:14:02,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323200324] [2021-05-22 02:14:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:14:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:02,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:14:02,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323200324] [2021-05-22 02:14:02,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323200324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:02,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601434083] [2021-05-22 02:14:02,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:02,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:14:02,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:14:02,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:14:02,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:14:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:02,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601434083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:02,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:14:02,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:14:02,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146830191] [2021-05-22 02:14:02,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:14:02,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:14:02,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:14:02,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:14:02,966 INFO L87 Difference]: Start difference. First operand 131193 states and 485683 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:14:04,898 INFO L93 Difference]: Finished difference Result 131828 states and 487461 transitions. [2021-05-22 02:14:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:14:04,899 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:14:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:14:05,631 INFO L225 Difference]: With dead ends: 131828 [2021-05-22 02:14:05,632 INFO L226 Difference]: Without dead ends: 131717 [2021-05-22 02:14:05,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:14:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131717 states. [2021-05-22 02:14:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131717 to 131381. [2021-05-22 02:14:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131381 states, 131380 states have (on average 3.7014537981427917) internal successors, (486297), 131380 states have internal predecessors, (486297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131381 states to 131381 states and 486297 transitions. [2021-05-22 02:14:09,063 INFO L78 Accepts]: Start accepts. Automaton has 131381 states and 486297 transitions. Word has length 33 [2021-05-22 02:14:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:09,063 INFO L482 AbstractCegarLoop]: Abstraction has 131381 states and 486297 transitions. [2021-05-22 02:14:09,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 131381 states and 486297 transitions. [2021-05-22 02:14:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:14:09,327 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:14:09,327 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:14:09,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:09,527 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:14:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:14:09,528 INFO L82 PathProgramCache]: Analyzing trace with hash -410972520, now seen corresponding path program 129 times [2021-05-22 02:14:09,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:14:09,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241325876] [2021-05-22 02:14:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:14:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:09,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:14:09,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241325876] [2021-05-22 02:14:09,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241325876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:09,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278649717] [2021-05-22 02:14:09,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:09,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:14:09,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:14:09,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:14:09,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:14:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:10,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278649717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:10,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:14:10,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:14:10,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603619509] [2021-05-22 02:14:10,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:14:10,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:14:10,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:14:10,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:14:10,012 INFO L87 Difference]: Start difference. First operand 131381 states and 486297 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:11,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:14:11,642 INFO L93 Difference]: Finished difference Result 131995 states and 488033 transitions. [2021-05-22 02:14:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:14:11,643 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:14:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:14:12,072 INFO L225 Difference]: With dead ends: 131995 [2021-05-22 02:14:12,072 INFO L226 Difference]: Without dead ends: 131906 [2021-05-22 02:14:12,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:14:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131906 states. [2021-05-22 02:14:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131906 to 131576. [2021-05-22 02:14:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131576 states, 131575 states have (on average 3.7008626258787762) internal successors, (486941), 131575 states have internal predecessors, (486941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131576 states to 131576 states and 486941 transitions. [2021-05-22 02:14:15,250 INFO L78 Accepts]: Start accepts. Automaton has 131576 states and 486941 transitions. Word has length 33 [2021-05-22 02:14:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:15,250 INFO L482 AbstractCegarLoop]: Abstraction has 131576 states and 486941 transitions. [2021-05-22 02:14:15,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 131576 states and 486941 transitions. [2021-05-22 02:14:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:14:15,517 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:14:15,517 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:14:15,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:15,718 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:14:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:14:15,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1901641564, now seen corresponding path program 130 times [2021-05-22 02:14:15,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:14:15,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544141753] [2021-05-22 02:14:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:14:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:16,356 WARN L205 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-22 02:14:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:16,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:14:16,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544141753] [2021-05-22 02:14:16,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544141753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:16,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583624471] [2021-05-22 02:14:16,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:16,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:14:16,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:14:16,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:14:16,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:14:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:16,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583624471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:16,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:14:16,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:14:16,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413824590] [2021-05-22 02:14:16,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:14:16,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:14:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:14:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:14:16,786 INFO L87 Difference]: Start difference. First operand 131576 states and 486941 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:14:17,761 INFO L93 Difference]: Finished difference Result 132177 states and 488586 transitions. [2021-05-22 02:14:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:14:17,761 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:14:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:14:18,158 INFO L225 Difference]: With dead ends: 132177 [2021-05-22 02:14:18,158 INFO L226 Difference]: Without dead ends: 132066 [2021-05-22 02:14:18,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 995.5ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:14:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132066 states. [2021-05-22 02:14:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132066 to 131642. [2021-05-22 02:14:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131642 states, 131641 states have (on average 3.700853077688562) internal successors, (487184), 131641 states have internal predecessors, (487184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131642 states to 131642 states and 487184 transitions. [2021-05-22 02:14:21,799 INFO L78 Accepts]: Start accepts. Automaton has 131642 states and 487184 transitions. Word has length 33 [2021-05-22 02:14:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:21,813 INFO L482 AbstractCegarLoop]: Abstraction has 131642 states and 487184 transitions. [2021-05-22 02:14:21,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 131642 states and 487184 transitions. [2021-05-22 02:14:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:14:22,144 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:14:22,144 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:14:22,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-22 02:14:22,344 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:14:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:14:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash -773235108, now seen corresponding path program 131 times [2021-05-22 02:14:22,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:14:22,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066235250] [2021-05-22 02:14:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:14:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:22,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:14:22,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066235250] [2021-05-22 02:14:22,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066235250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:22,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675309098] [2021-05-22 02:14:22,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:22,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:14:22,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:14:22,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:14:22,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:14:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:22,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675309098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:22,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:14:22,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:14:22,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641432124] [2021-05-22 02:14:22,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:14:22,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:14:22,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:14:22,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:14:22,686 INFO L87 Difference]: Start difference. First operand 131642 states and 487184 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:14:24,417 INFO L93 Difference]: Finished difference Result 132137 states and 488592 transitions. [2021-05-22 02:14:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:14:24,417 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:14:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:14:24,866 INFO L225 Difference]: With dead ends: 132137 [2021-05-22 02:14:24,866 INFO L226 Difference]: Without dead ends: 132107 [2021-05-22 02:14:24,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:14:25,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132107 states. [2021-05-22 02:14:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132107 to 131739. [2021-05-22 02:14:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131739 states, 131738 states have (on average 3.7007697095750656) internal successors, (487532), 131738 states have internal predecessors, (487532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131739 states to 131739 states and 487532 transitions. [2021-05-22 02:14:28,057 INFO L78 Accepts]: Start accepts. Automaton has 131739 states and 487532 transitions. Word has length 33 [2021-05-22 02:14:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:28,058 INFO L482 AbstractCegarLoop]: Abstraction has 131739 states and 487532 transitions. [2021-05-22 02:14:28,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 131739 states and 487532 transitions. [2021-05-22 02:14:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:14:28,311 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:14:28,311 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:14:28,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-22 02:14:28,511 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:14:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:14:28,512 INFO L82 PathProgramCache]: Analyzing trace with hash -172389872, now seen corresponding path program 132 times [2021-05-22 02:14:28,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:14:28,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181363522] [2021-05-22 02:14:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:14:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:28,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:14:28,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181363522] [2021-05-22 02:14:28,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181363522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:28,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684146442] [2021-05-22 02:14:28,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:28,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:14:28,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:14:28,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:14:28,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:14:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:28,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684146442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:28,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:14:28,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:14:28,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313350582] [2021-05-22 02:14:28,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:14:28,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:14:28,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:14:28,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:14:28,864 INFO L87 Difference]: Start difference. First operand 131739 states and 487532 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:14:30,355 INFO L93 Difference]: Finished difference Result 132172 states and 488791 transitions. [2021-05-22 02:14:30,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:14:30,356 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:14:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:14:30,765 INFO L225 Difference]: With dead ends: 132172 [2021-05-22 02:14:30,765 INFO L226 Difference]: Without dead ends: 132142 [2021-05-22 02:14:30,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:14:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132142 states. [2021-05-22 02:14:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132142 to 131868. [2021-05-22 02:14:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131868 states, 131867 states have (on average 3.7004481788468686) internal successors, (487967), 131867 states have internal predecessors, (487967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131868 states to 131868 states and 487967 transitions. [2021-05-22 02:14:33,713 INFO L78 Accepts]: Start accepts. Automaton has 131868 states and 487967 transitions. Word has length 33 [2021-05-22 02:14:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:33,713 INFO L482 AbstractCegarLoop]: Abstraction has 131868 states and 487967 transitions. [2021-05-22 02:14:33,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 131868 states and 487967 transitions. [2021-05-22 02:14:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:14:33,966 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:14:33,966 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:14:34,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:34,167 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:14:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:14:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1751652820, now seen corresponding path program 133 times [2021-05-22 02:14:34,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:14:34,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635036529] [2021-05-22 02:14:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:14:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:34,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:14:34,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635036529] [2021-05-22 02:14:34,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635036529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:34,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445583292] [2021-05-22 02:14:34,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:34,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:14:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:14:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:35,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445583292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:35,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:14:35,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:14:35,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601806902] [2021-05-22 02:14:35,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:14:35,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:14:35,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:14:35,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:14:35,084 INFO L87 Difference]: Start difference. First operand 131868 states and 487967 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:14:36,189 INFO L93 Difference]: Finished difference Result 132329 states and 489260 transitions. [2021-05-22 02:14:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:14:36,190 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:14:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:14:36,584 INFO L225 Difference]: With dead ends: 132329 [2021-05-22 02:14:36,584 INFO L226 Difference]: Without dead ends: 132261 [2021-05-22 02:14:36,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:14:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132261 states. [2021-05-22 02:14:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132261 to 131985. [2021-05-22 02:14:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131985 states, 131984 states have (on average 3.7004258091889928) internal successors, (488397), 131984 states have internal predecessors, (488397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131985 states to 131985 states and 488397 transitions. [2021-05-22 02:14:39,744 INFO L78 Accepts]: Start accepts. Automaton has 131985 states and 488397 transitions. Word has length 33 [2021-05-22 02:14:39,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:39,745 INFO L482 AbstractCegarLoop]: Abstraction has 131985 states and 488397 transitions. [2021-05-22 02:14:39,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 131985 states and 488397 transitions. [2021-05-22 02:14:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:14:40,722 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:14:40,722 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:14:40,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:40,937 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:14:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:14:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash -230700392, now seen corresponding path program 134 times [2021-05-22 02:14:40,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:14:40,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302969286] [2021-05-22 02:14:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:14:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:41,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:14:41,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302969286] [2021-05-22 02:14:41,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302969286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:41,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745058748] [2021-05-22 02:14:41,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:41,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:14:41,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:14:41,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:14:41,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:14:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:41,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745058748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:41,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:14:41,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:14:41,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835866303] [2021-05-22 02:14:41,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:14:41,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:14:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:14:41,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:14:41,303 INFO L87 Difference]: Start difference. First operand 131985 states and 488397 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:42,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:14:42,352 INFO L93 Difference]: Finished difference Result 132441 states and 489638 transitions. [2021-05-22 02:14:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:14:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:14:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:14:43,463 INFO L225 Difference]: With dead ends: 132441 [2021-05-22 02:14:43,464 INFO L226 Difference]: Without dead ends: 132361 [2021-05-22 02:14:43,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:14:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132361 states. [2021-05-22 02:14:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132361 to 131999. [2021-05-22 02:14:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131999 states, 131998 states have (on average 3.700328792860498) internal successors, (488436), 131998 states have internal predecessors, (488436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131999 states to 131999 states and 488436 transitions. [2021-05-22 02:14:46,853 INFO L78 Accepts]: Start accepts. Automaton has 131999 states and 488436 transitions. Word has length 33 [2021-05-22 02:14:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:46,853 INFO L482 AbstractCegarLoop]: Abstraction has 131999 states and 488436 transitions. [2021-05-22 02:14:46,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 131999 states and 488436 transitions. [2021-05-22 02:14:47,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:14:47,154 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:14:47,154 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:14:47,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:47,355 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:14:47,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:14:47,355 INFO L82 PathProgramCache]: Analyzing trace with hash -414385964, now seen corresponding path program 135 times [2021-05-22 02:14:47,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:14:47,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154825016] [2021-05-22 02:14:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:14:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:47,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:14:47,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154825016] [2021-05-22 02:14:47,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154825016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:47,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820137391] [2021-05-22 02:14:47,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:47,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:14:47,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:14:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:14:47,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:14:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:47,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820137391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:47,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:14:47,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:14:47,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660242584] [2021-05-22 02:14:47,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:14:47,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:14:47,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:14:47,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:14:47,753 INFO L87 Difference]: Start difference. First operand 131999 states and 488436 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:14:49,368 INFO L93 Difference]: Finished difference Result 132789 states and 490695 transitions. [2021-05-22 02:14:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:14:49,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:14:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:14:49,847 INFO L225 Difference]: With dead ends: 132789 [2021-05-22 02:14:49,847 INFO L226 Difference]: Without dead ends: 132700 [2021-05-22 02:14:49,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:14:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132700 states. [2021-05-22 02:14:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132700 to 132304. [2021-05-22 02:14:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132304 states, 132303 states have (on average 3.699349221106097) internal successors, (489435), 132303 states have internal predecessors, (489435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132304 states to 132304 states and 489435 transitions. [2021-05-22 02:14:53,092 INFO L78 Accepts]: Start accepts. Automaton has 132304 states and 489435 transitions. Word has length 33 [2021-05-22 02:14:53,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:53,092 INFO L482 AbstractCegarLoop]: Abstraction has 132304 states and 489435 transitions. [2021-05-22 02:14:53,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 132304 states and 489435 transitions. [2021-05-22 02:14:53,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:14:53,354 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:14:53,354 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:14:53,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-05-22 02:14:53,555 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:14:53,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:14:53,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1898228120, now seen corresponding path program 136 times [2021-05-22 02:14:53,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:14:53,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914380807] [2021-05-22 02:14:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:14:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:53,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:14:53,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914380807] [2021-05-22 02:14:53,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914380807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:53,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544687060] [2021-05-22 02:14:53,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:53,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:14:53,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:14:53,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:14:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:14:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:53,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544687060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:53,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:14:53,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:14:53,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47592156] [2021-05-22 02:14:53,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:14:53,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:14:53,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:14:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:14:53,887 INFO L87 Difference]: Start difference. First operand 132304 states and 489435 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:14:55,581 INFO L93 Difference]: Finished difference Result 132973 states and 491280 transitions. [2021-05-22 02:14:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:14:55,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:14:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:14:55,988 INFO L225 Difference]: With dead ends: 132973 [2021-05-22 02:14:55,988 INFO L226 Difference]: Without dead ends: 132862 [2021-05-22 02:14:55,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:14:56,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132862 states. [2021-05-22 02:14:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132862 to 132462. [2021-05-22 02:14:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132462 states, 132461 states have (on average 3.698794362114132) internal successors, (489946), 132461 states have internal predecessors, (489946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132462 states to 132462 states and 489946 transitions. [2021-05-22 02:14:59,258 INFO L78 Accepts]: Start accepts. Automaton has 132462 states and 489946 transitions. Word has length 33 [2021-05-22 02:14:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:59,258 INFO L482 AbstractCegarLoop]: Abstraction has 132462 states and 489946 transitions. [2021-05-22 02:14:59,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 132462 states and 489946 transitions. [2021-05-22 02:15:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:15:00,619 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:15:00,619 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:15:00,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-22 02:15:00,833 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:15:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:15:00,833 INFO L82 PathProgramCache]: Analyzing trace with hash -776648552, now seen corresponding path program 137 times [2021-05-22 02:15:00,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:15:00,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122795177] [2021-05-22 02:15:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:15:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:00,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:15:00,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122795177] [2021-05-22 02:15:00,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122795177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:00,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614513947] [2021-05-22 02:15:00,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:01,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:15:01,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:15:01,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:15:01,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:15:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:01,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614513947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:01,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:15:01,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:15:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988245755] [2021-05-22 02:15:01,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:15:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:15:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:15:01,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:15:01,315 INFO L87 Difference]: Start difference. First operand 132462 states and 489946 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:15:02,717 INFO L93 Difference]: Finished difference Result 133313 states and 492428 transitions. [2021-05-22 02:15:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:15:02,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:15:02,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:15:03,205 INFO L225 Difference]: With dead ends: 133313 [2021-05-22 02:15:03,205 INFO L226 Difference]: Without dead ends: 133267 [2021-05-22 02:15:03,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:15:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133267 states. [2021-05-22 02:15:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133267 to 132771. [2021-05-22 02:15:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132771 states, 132770 states have (on average 3.697635007908413) internal successors, (490935), 132770 states have internal predecessors, (490935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132771 states to 132771 states and 490935 transitions. [2021-05-22 02:15:06,964 INFO L78 Accepts]: Start accepts. Automaton has 132771 states and 490935 transitions. Word has length 33 [2021-05-22 02:15:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:15:06,964 INFO L482 AbstractCegarLoop]: Abstraction has 132771 states and 490935 transitions. [2021-05-22 02:15:06,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 132771 states and 490935 transitions. [2021-05-22 02:15:07,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:15:07,307 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:15:07,307 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:15:07,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-22 02:15:07,508 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:15:07,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:15:07,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1081481172, now seen corresponding path program 138 times [2021-05-22 02:15:07,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:15:07,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593096570] [2021-05-22 02:15:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:15:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:07,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:15:07,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593096570] [2021-05-22 02:15:07,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593096570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:07,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866877507] [2021-05-22 02:15:07,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:07,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:15:07,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:15:07,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:15:07,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:15:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:07,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866877507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:07,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:15:07,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:15:07,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846814036] [2021-05-22 02:15:07,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:15:07,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:15:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:15:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:15:07,868 INFO L87 Difference]: Start difference. First operand 132771 states and 490935 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:09,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:15:09,612 INFO L93 Difference]: Finished difference Result 133655 states and 493544 transitions. [2021-05-22 02:15:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:15:09,617 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:15:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:15:10,055 INFO L225 Difference]: With dead ends: 133655 [2021-05-22 02:15:10,055 INFO L226 Difference]: Without dead ends: 133607 [2021-05-22 02:15:10,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:15:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133607 states. [2021-05-22 02:15:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133607 to 133055. [2021-05-22 02:15:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133055 states, 133054 states have (on average 3.697047815172787) internal successors, (491907), 133054 states have internal predecessors, (491907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133055 states to 133055 states and 491907 transitions. [2021-05-22 02:15:13,340 INFO L78 Accepts]: Start accepts. Automaton has 133055 states and 491907 transitions. Word has length 33 [2021-05-22 02:15:13,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:15:13,340 INFO L482 AbstractCegarLoop]: Abstraction has 133055 states and 491907 transitions. [2021-05-22 02:15:13,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:13,341 INFO L276 IsEmpty]: Start isEmpty. Operand 133055 states and 491907 transitions. [2021-05-22 02:15:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:15:13,616 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:15:13,616 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:15:13,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-22 02:15:13,816 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:15:13,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:15:13,816 INFO L82 PathProgramCache]: Analyzing trace with hash -900872040, now seen corresponding path program 139 times [2021-05-22 02:15:13,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:15:13,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290228842] [2021-05-22 02:15:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:15:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:13,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:15:13,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290228842] [2021-05-22 02:15:13,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290228842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:13,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969117054] [2021-05-22 02:15:13,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:13,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:15:13,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:15:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:14,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969117054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:14,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:15:14,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:15:14,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972834641] [2021-05-22 02:15:14,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:15:14,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:15:14,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:15:14,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:15:14,177 INFO L87 Difference]: Start difference. First operand 133055 states and 491907 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:15:15,724 INFO L93 Difference]: Finished difference Result 134042 states and 494886 transitions. [2021-05-22 02:15:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:15:15,724 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:15:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:15:16,170 INFO L225 Difference]: With dead ends: 134042 [2021-05-22 02:15:16,170 INFO L226 Difference]: Without dead ends: 133996 [2021-05-22 02:15:16,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:15:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133996 states. [2021-05-22 02:15:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133996 to 133457. [2021-05-22 02:15:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133457 states, 133456 states have (on average 3.696132058506174) internal successors, (493271), 133456 states have internal predecessors, (493271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133457 states to 133457 states and 493271 transitions. [2021-05-22 02:15:19,388 INFO L78 Accepts]: Start accepts. Automaton has 133457 states and 493271 transitions. Word has length 33 [2021-05-22 02:15:19,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:15:19,388 INFO L482 AbstractCegarLoop]: Abstraction has 133457 states and 493271 transitions. [2021-05-22 02:15:19,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:19,388 INFO L276 IsEmpty]: Start isEmpty. Operand 133457 states and 493271 transitions. [2021-05-22 02:15:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:15:19,658 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:15:19,658 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:15:19,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-22 02:15:19,859 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:15:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:15:19,859 INFO L82 PathProgramCache]: Analyzing trace with hash 719218584, now seen corresponding path program 140 times [2021-05-22 02:15:19,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:15:19,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342671649] [2021-05-22 02:15:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:15:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:20,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:15:20,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342671649] [2021-05-22 02:15:20,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342671649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:20,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297616638] [2021-05-22 02:15:20,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:20,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:15:20,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:15:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:15:20,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:15:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:21,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297616638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:21,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:15:21,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:15:21,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506501740] [2021-05-22 02:15:21,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:15:21,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:15:21,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:15:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:15:21,006 INFO L87 Difference]: Start difference. First operand 133457 states and 493271 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:15:22,135 INFO L93 Difference]: Finished difference Result 134285 states and 495729 transitions. [2021-05-22 02:15:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:15:22,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:15:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:15:22,585 INFO L225 Difference]: With dead ends: 134285 [2021-05-22 02:15:22,585 INFO L226 Difference]: Without dead ends: 134239 [2021-05-22 02:15:22,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1041.0ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:15:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134239 states. [2021-05-22 02:15:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134239 to 133729. [2021-05-22 02:15:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133729 states, 133728 states have (on average 3.6952844580043074) internal successors, (494163), 133728 states have internal predecessors, (494163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133729 states to 133729 states and 494163 transitions. [2021-05-22 02:15:26,660 INFO L78 Accepts]: Start accepts. Automaton has 133729 states and 494163 transitions. Word has length 33 [2021-05-22 02:15:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:15:26,661 INFO L482 AbstractCegarLoop]: Abstraction has 133729 states and 494163 transitions. [2021-05-22 02:15:26,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 133729 states and 494163 transitions. [2021-05-22 02:15:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:15:27,007 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:15:27,007 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:15:27,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-22 02:15:27,208 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:15:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:15:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1446820200, now seen corresponding path program 141 times [2021-05-22 02:15:27,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:15:27,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746985978] [2021-05-22 02:15:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:15:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:27,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:15:27,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746985978] [2021-05-22 02:15:27,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746985978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:27,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524355781] [2021-05-22 02:15:27,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:27,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:15:27,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:15:27,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:15:27,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:15:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:27,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524355781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:27,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:15:27,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:15:27,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409148102] [2021-05-22 02:15:27,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:15:27,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:15:27,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:15:27,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:15:27,572 INFO L87 Difference]: Start difference. First operand 133729 states and 494163 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:29,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:15:29,359 INFO L93 Difference]: Finished difference Result 134286 states and 495782 transitions. [2021-05-22 02:15:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:15:29,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:15:29,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:15:29,855 INFO L225 Difference]: With dead ends: 134286 [2021-05-22 02:15:29,855 INFO L226 Difference]: Without dead ends: 134256 [2021-05-22 02:15:29,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 332.7ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:15:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134256 states. [2021-05-22 02:15:32,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134256 to 133862. [2021-05-22 02:15:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133862 states, 133861 states have (on average 3.6949522265633754) internal successors, (494610), 133861 states have internal predecessors, (494610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133862 states to 133862 states and 494610 transitions. [2021-05-22 02:15:33,370 INFO L78 Accepts]: Start accepts. Automaton has 133862 states and 494610 transitions. Word has length 33 [2021-05-22 02:15:33,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:15:33,370 INFO L482 AbstractCegarLoop]: Abstraction has 133862 states and 494610 transitions. [2021-05-22 02:15:33,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 133862 states and 494610 transitions. [2021-05-22 02:15:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:15:33,662 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:15:33,662 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:15:33,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:33,865 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:15:33,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:15:33,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1180848474, now seen corresponding path program 142 times [2021-05-22 02:15:33,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:15:33,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055827425] [2021-05-22 02:15:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:15:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:33,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:15:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055827425] [2021-05-22 02:15:33,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055827425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:33,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972641140] [2021-05-22 02:15:33,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:33,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:15:33,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:15:33,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:15:33,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:15:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:34,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972641140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:34,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:15:34,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:15:34,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330816076] [2021-05-22 02:15:34,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:15:34,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:15:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:15:34,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:15:34,301 INFO L87 Difference]: Start difference. First operand 133862 states and 494610 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:15:36,165 INFO L93 Difference]: Finished difference Result 134087 states and 495235 transitions. [2021-05-22 02:15:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:15:36,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:15:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:15:36,602 INFO L225 Difference]: With dead ends: 134087 [2021-05-22 02:15:36,602 INFO L226 Difference]: Without dead ends: 134059 [2021-05-22 02:15:36,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 485.0ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:15:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134059 states. [2021-05-22 02:15:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134059 to 133901. [2021-05-22 02:15:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133901 states, 133900 states have (on average 3.6948319641523524) internal successors, (494738), 133900 states have internal predecessors, (494738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133901 states to 133901 states and 494738 transitions. [2021-05-22 02:15:39,787 INFO L78 Accepts]: Start accepts. Automaton has 133901 states and 494738 transitions. Word has length 33 [2021-05-22 02:15:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:15:39,788 INFO L482 AbstractCegarLoop]: Abstraction has 133901 states and 494738 transitions. [2021-05-22 02:15:39,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 133901 states and 494738 transitions. [2021-05-22 02:15:40,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:15:40,065 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:15:40,065 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:15:40,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-05-22 02:15:40,265 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:15:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:15:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash 886630802, now seen corresponding path program 143 times [2021-05-22 02:15:40,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:15:40,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275999153] [2021-05-22 02:15:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:15:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:41,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:15:41,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275999153] [2021-05-22 02:15:41,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275999153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:41,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331607907] [2021-05-22 02:15:41,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:41,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:15:41,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:15:41,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:15:41,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:15:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:41,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331607907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:41,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:15:41,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:15:41,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519757562] [2021-05-22 02:15:41,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:15:41,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:15:41,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:15:41,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:15:41,375 INFO L87 Difference]: Start difference. First operand 133901 states and 494738 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:15:42,490 INFO L93 Difference]: Finished difference Result 134211 states and 495550 transitions. [2021-05-22 02:15:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:15:42,491 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:15:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:15:42,905 INFO L225 Difference]: With dead ends: 134211 [2021-05-22 02:15:42,906 INFO L226 Difference]: Without dead ends: 134069 [2021-05-22 02:15:42,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:15:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134069 states. [2021-05-22 02:15:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134069 to 133952. [2021-05-22 02:15:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133952 states, 133951 states have (on average 3.694612208942076) internal successors, (494897), 133951 states have internal predecessors, (494897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133952 states to 133952 states and 494897 transitions. [2021-05-22 02:15:46,913 INFO L78 Accepts]: Start accepts. Automaton has 133952 states and 494897 transitions. Word has length 33 [2021-05-22 02:15:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:15:46,913 INFO L482 AbstractCegarLoop]: Abstraction has 133952 states and 494897 transitions. [2021-05-22 02:15:46,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 133952 states and 494897 transitions. [2021-05-22 02:15:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:15:47,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:15:47,217 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:15:47,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:47,418 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:15:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:15:47,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1484293802, now seen corresponding path program 144 times [2021-05-22 02:15:47,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:15:47,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071268262] [2021-05-22 02:15:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:15:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:47,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:15:47,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071268262] [2021-05-22 02:15:47,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071268262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:47,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346057606] [2021-05-22 02:15:47,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:47,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:15:47,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:15:47,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:15:47,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:15:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:47,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346057606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:47,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:15:47,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:15:47,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684295648] [2021-05-22 02:15:47,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:15:47,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:15:47,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:15:47,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:15:47,770 INFO L87 Difference]: Start difference. First operand 133952 states and 494897 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:15:49,520 INFO L93 Difference]: Finished difference Result 134387 states and 496089 transitions. [2021-05-22 02:15:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:15:49,521 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:15:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:15:49,982 INFO L225 Difference]: With dead ends: 134387 [2021-05-22 02:15:49,982 INFO L226 Difference]: Without dead ends: 134277 [2021-05-22 02:15:49,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:15:50,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134277 states. [2021-05-22 02:15:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134277 to 134057. [2021-05-22 02:15:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134057 states, 134056 states have (on average 3.694254639852002) internal successors, (495237), 134056 states have internal predecessors, (495237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134057 states to 134057 states and 495237 transitions. [2021-05-22 02:15:53,311 INFO L78 Accepts]: Start accepts. Automaton has 134057 states and 495237 transitions. Word has length 33 [2021-05-22 02:15:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:15:53,311 INFO L482 AbstractCegarLoop]: Abstraction has 134057 states and 495237 transitions. [2021-05-22 02:15:53,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 134057 states and 495237 transitions. [2021-05-22 02:15:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:15:53,584 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:15:53,584 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:15:53,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:53,785 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:15:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:15:53,785 INFO L82 PathProgramCache]: Analyzing trace with hash 828320282, now seen corresponding path program 145 times [2021-05-22 02:15:53,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:15:53,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011767972] [2021-05-22 02:15:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:15:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:53,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:15:53,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011767972] [2021-05-22 02:15:53,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011767972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:53,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235344998] [2021-05-22 02:15:53,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:53,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:15:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:15:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:54,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235344998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:54,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:15:54,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:15:54,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325898549] [2021-05-22 02:15:54,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:15:54,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:15:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:15:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:15:54,129 INFO L87 Difference]: Start difference. First operand 134057 states and 495237 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:15:56,106 INFO L93 Difference]: Finished difference Result 134490 states and 496428 transitions. [2021-05-22 02:15:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:15:56,106 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:15:56,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:15:56,796 INFO L225 Difference]: With dead ends: 134490 [2021-05-22 02:15:56,796 INFO L226 Difference]: Without dead ends: 134406 [2021-05-22 02:15:56,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 359.3ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:15:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134406 states. [2021-05-22 02:15:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134406 to 134109. [2021-05-22 02:15:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134109 states, 134108 states have (on average 3.694343365049065) internal successors, (495441), 134108 states have internal predecessors, (495441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134109 states to 134109 states and 495441 transitions. [2021-05-22 02:16:00,209 INFO L78 Accepts]: Start accepts. Automaton has 134109 states and 495441 transitions. Word has length 33 [2021-05-22 02:16:00,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:00,210 INFO L482 AbstractCegarLoop]: Abstraction has 134109 states and 495441 transitions. [2021-05-22 02:16:00,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 134109 states and 495441 transitions. [2021-05-22 02:16:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:16:00,489 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:00,489 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:00,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:00,689 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:00,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1915604274, now seen corresponding path program 146 times [2021-05-22 02:16:00,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:00,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066416408] [2021-05-22 02:16:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:00,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:00,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066416408] [2021-05-22 02:16:00,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066416408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:00,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193553932] [2021-05-22 02:16:00,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:00,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:16:00,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:16:00,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:16:00,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:01,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193553932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:01,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:01,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:16:01,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287648424] [2021-05-22 02:16:01,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:16:01,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:16:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:16:01,088 INFO L87 Difference]: Start difference. First operand 134109 states and 495441 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:02,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:02,825 INFO L93 Difference]: Finished difference Result 134427 states and 496277 transitions. [2021-05-22 02:16:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:16:02,825 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:16:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:03,286 INFO L225 Difference]: With dead ends: 134427 [2021-05-22 02:16:03,286 INFO L226 Difference]: Without dead ends: 134285 [2021-05-22 02:16:03,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:16:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134285 states. [2021-05-22 02:16:06,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134285 to 134133. [2021-05-22 02:16:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134133 states, 134132 states have (on average 3.694248948796708) internal successors, (495517), 134132 states have internal predecessors, (495517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134133 states to 134133 states and 495517 transitions. [2021-05-22 02:16:06,700 INFO L78 Accepts]: Start accepts. Automaton has 134133 states and 495517 transitions. Word has length 33 [2021-05-22 02:16:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:06,700 INFO L482 AbstractCegarLoop]: Abstraction has 134133 states and 495517 transitions. [2021-05-22 02:16:06,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 134133 states and 495517 transitions. [2021-05-22 02:16:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:16:07,624 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:07,624 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:07,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:07,838 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:07,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:07,838 INFO L82 PathProgramCache]: Analyzing trace with hash 8438418, now seen corresponding path program 147 times [2021-05-22 02:16:07,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:07,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237829344] [2021-05-22 02:16:07,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:07,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:07,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237829344] [2021-05-22 02:16:07,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237829344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:07,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352343473] [2021-05-22 02:16:07,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:07,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:16:07,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:16:07,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:16:07,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:08,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352343473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:08,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:08,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:16:08,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437691677] [2021-05-22 02:16:08,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:16:08,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:16:08,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:16:08,173 INFO L87 Difference]: Start difference. First operand 134133 states and 495517 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:09,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:09,296 INFO L93 Difference]: Finished difference Result 134488 states and 496453 transitions. [2021-05-22 02:16:09,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:16:09,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:16:09,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:09,724 INFO L225 Difference]: With dead ends: 134488 [2021-05-22 02:16:09,725 INFO L226 Difference]: Without dead ends: 134378 [2021-05-22 02:16:09,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 325.2ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:16:10,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134378 states. [2021-05-22 02:16:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134378 to 134238. [2021-05-22 02:16:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134238 states, 134237 states have (on average 3.6939815401118916) internal successors, (495869), 134237 states have internal predecessors, (495869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134238 states to 134238 states and 495869 transitions. [2021-05-22 02:16:13,845 INFO L78 Accepts]: Start accepts. Automaton has 134238 states and 495869 transitions. Word has length 33 [2021-05-22 02:16:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:13,845 INFO L482 AbstractCegarLoop]: Abstraction has 134238 states and 495869 transitions. [2021-05-22 02:16:13,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 134238 states and 495869 transitions. [2021-05-22 02:16:14,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:16:14,171 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:14,171 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:14,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-05-22 02:16:14,372 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:14,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1973914794, now seen corresponding path program 148 times [2021-05-22 02:16:14,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:14,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017147494] [2021-05-22 02:16:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:14,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:14,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017147494] [2021-05-22 02:16:14,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017147494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:14,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914744294] [2021-05-22 02:16:14,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:14,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:16:14,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:16:14,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:16:14,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:14,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914744294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:14,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:14,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:16:14,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993440587] [2021-05-22 02:16:14,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:16:14,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:14,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:16:14,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:16:14,810 INFO L87 Difference]: Start difference. First operand 134238 states and 495869 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:16,546 INFO L93 Difference]: Finished difference Result 134606 states and 496835 transitions. [2021-05-22 02:16:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:16:16,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:16:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:17,024 INFO L225 Difference]: With dead ends: 134606 [2021-05-22 02:16:17,025 INFO L226 Difference]: Without dead ends: 134470 [2021-05-22 02:16:17,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:16:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134470 states. [2021-05-22 02:16:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134470 to 134329. [2021-05-22 02:16:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134329 states, 134328 states have (on average 3.6937347388481925) internal successors, (496172), 134328 states have internal predecessors, (496172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134329 states to 134329 states and 496172 transitions. [2021-05-22 02:16:20,496 INFO L78 Accepts]: Start accepts. Automaton has 134329 states and 496172 transitions. Word has length 33 [2021-05-22 02:16:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:20,496 INFO L482 AbstractCegarLoop]: Abstraction has 134329 states and 496172 transitions. [2021-05-22 02:16:20,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 134329 states and 496172 transitions. [2021-05-22 02:16:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:16:20,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:20,775 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:20,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-22 02:16:20,976 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:20,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2137366930, now seen corresponding path program 149 times [2021-05-22 02:16:20,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:20,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579930343] [2021-05-22 02:16:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:21,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:21,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579930343] [2021-05-22 02:16:21,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579930343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:21,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010118808] [2021-05-22 02:16:21,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:21,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:16:21,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:16:21,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:16:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:21,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010118808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:21,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:21,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:16:21,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031790502] [2021-05-22 02:16:21,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:16:21,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:21,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:16:21,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:16:21,369 INFO L87 Difference]: Start difference. First operand 134329 states and 496172 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:23,042 INFO L93 Difference]: Finished difference Result 134895 states and 497770 transitions. [2021-05-22 02:16:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:16:23,043 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:16:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:23,490 INFO L225 Difference]: With dead ends: 134895 [2021-05-22 02:16:23,490 INFO L226 Difference]: Without dead ends: 134785 [2021-05-22 02:16:23,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:16:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134785 states. [2021-05-22 02:16:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134785 to 134598. [2021-05-22 02:16:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134598 states, 134597 states have (on average 3.692853481132566) internal successors, (497047), 134597 states have internal predecessors, (497047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134598 states to 134598 states and 497047 transitions. [2021-05-22 02:16:26,875 INFO L78 Accepts]: Start accepts. Automaton has 134598 states and 497047 transitions. Word has length 33 [2021-05-22 02:16:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:26,875 INFO L482 AbstractCegarLoop]: Abstraction has 134598 states and 497047 transitions. [2021-05-22 02:16:26,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 134598 states and 497047 transitions. [2021-05-22 02:16:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:16:27,848 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:27,848 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:28,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-22 02:16:28,049 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:28,049 INFO L82 PathProgramCache]: Analyzing trace with hash 155013718, now seen corresponding path program 150 times [2021-05-22 02:16:28,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:28,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586562666] [2021-05-22 02:16:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:28,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:28,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586562666] [2021-05-22 02:16:28,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586562666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:28,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764124299] [2021-05-22 02:16:28,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:28,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:16:28,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:16:28,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:16:28,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:28,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764124299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:28,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:28,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:16:28,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668785411] [2021-05-22 02:16:28,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:16:28,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:28,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:16:28,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:16:28,402 INFO L87 Difference]: Start difference. First operand 134598 states and 497047 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:29,504 INFO L93 Difference]: Finished difference Result 135111 states and 498442 transitions. [2021-05-22 02:16:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:16:29,513 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:16:29,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:29,975 INFO L225 Difference]: With dead ends: 135111 [2021-05-22 02:16:29,975 INFO L226 Difference]: Without dead ends: 134975 [2021-05-22 02:16:29,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:16:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134975 states. [2021-05-22 02:16:32,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134975 to 134792. [2021-05-22 02:16:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134792 states, 134791 states have (on average 3.6920269157436327) internal successors, (497652), 134791 states have internal predecessors, (497652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134792 states to 134792 states and 497652 transitions. [2021-05-22 02:16:33,945 INFO L78 Accepts]: Start accepts. Automaton has 134792 states and 497652 transitions. Word has length 33 [2021-05-22 02:16:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:33,945 INFO L482 AbstractCegarLoop]: Abstraction has 134792 states and 497652 transitions. [2021-05-22 02:16:33,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:33,945 INFO L276 IsEmpty]: Start isEmpty. Operand 134792 states and 497652 transitions. [2021-05-22 02:16:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:16:34,282 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:34,282 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:34,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-22 02:16:34,483 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1775104342, now seen corresponding path program 151 times [2021-05-22 02:16:34,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:34,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531433025] [2021-05-22 02:16:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:34,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:34,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531433025] [2021-05-22 02:16:34,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531433025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:34,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689413484] [2021-05-22 02:16:34,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:34,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:16:34,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:34,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689413484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:34,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:34,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:16:34,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190249053] [2021-05-22 02:16:34,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:16:34,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:34,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:16:34,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:16:34,846 INFO L87 Difference]: Start difference. First operand 134792 states and 497652 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:36,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:36,593 INFO L93 Difference]: Finished difference Result 135221 states and 498845 transitions. [2021-05-22 02:16:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:16:36,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:16:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:37,053 INFO L225 Difference]: With dead ends: 135221 [2021-05-22 02:16:37,053 INFO L226 Difference]: Without dead ends: 135130 [2021-05-22 02:16:37,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:16:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135130 states. [2021-05-22 02:16:39,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135130 to 134844. [2021-05-22 02:16:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134844 states, 134843 states have (on average 3.6920270240205277) internal successors, (497844), 134843 states have internal predecessors, (497844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134844 states to 134844 states and 497844 transitions. [2021-05-22 02:16:40,304 INFO L78 Accepts]: Start accepts. Automaton has 134844 states and 497844 transitions. Word has length 33 [2021-05-22 02:16:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:40,305 INFO L482 AbstractCegarLoop]: Abstraction has 134844 states and 497844 transitions. [2021-05-22 02:16:40,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 134844 states and 497844 transitions. [2021-05-22 02:16:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:16:40,574 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:40,574 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:40,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:40,774 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:40,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:40,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1268459362, now seen corresponding path program 152 times [2021-05-22 02:16:40,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:40,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204415973] [2021-05-22 02:16:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:40,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:40,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204415973] [2021-05-22 02:16:40,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204415973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:40,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140711592] [2021-05-22 02:16:40,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:40,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:16:40,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:16:40,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:16:40,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:41,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140711592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:41,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:41,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:16:41,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931561018] [2021-05-22 02:16:41,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:16:41,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:41,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:16:41,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:16:41,138 INFO L87 Difference]: Start difference. First operand 134844 states and 497844 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:42,828 INFO L93 Difference]: Finished difference Result 135053 states and 498421 transitions. [2021-05-22 02:16:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:16:42,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:16:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:43,252 INFO L225 Difference]: With dead ends: 135053 [2021-05-22 02:16:43,253 INFO L226 Difference]: Without dead ends: 135025 [2021-05-22 02:16:43,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 978.1ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:16:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135025 states. [2021-05-22 02:16:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135025 to 134864. [2021-05-22 02:16:46,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134864 states, 134863 states have (on average 3.6919243973513862) internal successors, (497904), 134863 states have internal predecessors, (497904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134864 states to 134864 states and 497904 transitions. [2021-05-22 02:16:46,519 INFO L78 Accepts]: Start accepts. Automaton has 134864 states and 497904 transitions. Word has length 33 [2021-05-22 02:16:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:46,520 INFO L482 AbstractCegarLoop]: Abstraction has 134864 states and 497904 transitions. [2021-05-22 02:16:46,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 134864 states and 497904 transitions. [2021-05-22 02:16:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:16:47,447 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:47,447 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:47,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-05-22 02:16:47,661 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash -959028658, now seen corresponding path program 153 times [2021-05-22 02:16:47,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:47,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696451624] [2021-05-22 02:16:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:47,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:47,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696451624] [2021-05-22 02:16:47,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696451624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:47,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411792967] [2021-05-22 02:16:47,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:47,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:16:47,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:16:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:16:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:48,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411792967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:48,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:48,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:16:48,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323765732] [2021-05-22 02:16:48,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:16:48,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:48,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:16:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:16:48,011 INFO L87 Difference]: Start difference. First operand 134864 states and 497904 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:49,129 INFO L93 Difference]: Finished difference Result 135170 states and 498704 transitions. [2021-05-22 02:16:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:16:49,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:16:49,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:49,533 INFO L225 Difference]: With dead ends: 135170 [2021-05-22 02:16:49,533 INFO L226 Difference]: Without dead ends: 135028 [2021-05-22 02:16:49,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 364.3ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:16:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135028 states. [2021-05-22 02:16:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135028 to 134868. [2021-05-22 02:16:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134868 states, 134867 states have (on average 3.691903875670105) internal successors, (497916), 134867 states have internal predecessors, (497916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134868 states to 134868 states and 497916 transitions. [2021-05-22 02:16:53,475 INFO L78 Accepts]: Start accepts. Automaton has 134868 states and 497916 transitions. Word has length 33 [2021-05-22 02:16:53,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:53,475 INFO L482 AbstractCegarLoop]: Abstraction has 134868 states and 497916 transitions. [2021-05-22 02:16:53,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand 134868 states and 497916 transitions. [2021-05-22 02:16:54,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:16:54,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:54,535 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:54,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:54,749 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:54,749 INFO L82 PathProgramCache]: Analyzing trace with hash 965014034, now seen corresponding path program 154 times [2021-05-22 02:16:54,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:54,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142254661] [2021-05-22 02:16:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:54,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:54,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142254661] [2021-05-22 02:16:54,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142254661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:54,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252528136] [2021-05-22 02:16:54,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:54,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:16:54,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:16:54,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:16:54,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:55,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252528136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:55,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:55,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:16:55,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911663098] [2021-05-22 02:16:55,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:16:55,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:16:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:16:55,104 INFO L87 Difference]: Start difference. First operand 134868 states and 497916 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:56,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:56,264 INFO L93 Difference]: Finished difference Result 135436 states and 499523 transitions. [2021-05-22 02:16:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:16:56,264 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:16:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:57,411 INFO L225 Difference]: With dead ends: 135436 [2021-05-22 02:16:57,411 INFO L226 Difference]: Without dead ends: 135326 [2021-05-22 02:16:57,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 356.5ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:16:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135326 states. [2021-05-22 02:16:59,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135326 to 135008. [2021-05-22 02:16:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135008 states, 135007 states have (on average 3.6911123126948975) internal successors, (498326), 135007 states have internal predecessors, (498326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135008 states to 135008 states and 498326 transitions. [2021-05-22 02:17:00,950 INFO L78 Accepts]: Start accepts. Automaton has 135008 states and 498326 transitions. Word has length 33 [2021-05-22 02:17:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:00,950 INFO L482 AbstractCegarLoop]: Abstraction has 135008 states and 498326 transitions. [2021-05-22 02:17:00,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 135008 states and 498326 transitions. [2021-05-22 02:17:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:01,235 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:01,235 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:01,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:01,436 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1017339178, now seen corresponding path program 155 times [2021-05-22 02:17:01,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:01,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981292129] [2021-05-22 02:17:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:01,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:01,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981292129] [2021-05-22 02:17:01,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981292129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:01,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722799693] [2021-05-22 02:17:01,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:01,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:17:01,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:17:01,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:17:01,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:01,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722799693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:01,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:01,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:17:01,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403988722] [2021-05-22 02:17:01,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:17:01,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:01,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:17:01,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:17:01,817 INFO L87 Difference]: Start difference. First operand 135008 states and 498326 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:03,519 INFO L93 Difference]: Finished difference Result 135409 states and 499417 transitions. [2021-05-22 02:17:03,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:17:03,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:04,206 INFO L225 Difference]: With dead ends: 135409 [2021-05-22 02:17:04,206 INFO L226 Difference]: Without dead ends: 135325 [2021-05-22 02:17:04,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:17:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135325 states. [2021-05-22 02:17:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135325 to 134976. [2021-05-22 02:17:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134976 states, 134975 states have (on average 3.6913057973698833) internal successors, (498234), 134975 states have internal predecessors, (498234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134976 states to 134976 states and 498234 transitions. [2021-05-22 02:17:07,461 INFO L78 Accepts]: Start accepts. Automaton has 134976 states and 498234 transitions. Word has length 33 [2021-05-22 02:17:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:07,461 INFO L482 AbstractCegarLoop]: Abstraction has 134976 states and 498234 transitions. [2021-05-22 02:17:07,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 134976 states and 498234 transitions. [2021-05-22 02:17:07,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:07,747 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:07,747 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:07,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:07,948 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:07,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1160274146, now seen corresponding path program 156 times [2021-05-22 02:17:07,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:07,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765277949] [2021-05-22 02:17:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:08,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:08,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765277949] [2021-05-22 02:17:08,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765277949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:08,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565653117] [2021-05-22 02:17:08,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:08,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:17:08,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:17:08,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:17:08,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:09,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565653117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:09,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:09,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:17:09,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248302125] [2021-05-22 02:17:09,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:17:09,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:09,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:17:09,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:17:09,036 INFO L87 Difference]: Start difference. First operand 134976 states and 498234 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:10,246 INFO L93 Difference]: Finished difference Result 135181 states and 498843 transitions. [2021-05-22 02:17:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:17:10,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:10,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:10,689 INFO L225 Difference]: With dead ends: 135181 [2021-05-22 02:17:10,689 INFO L226 Difference]: Without dead ends: 135166 [2021-05-22 02:17:10,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:17:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135166 states. [2021-05-22 02:17:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135166 to 135012. [2021-05-22 02:17:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135012 states, 135011 states have (on average 3.6913362614898046) internal successors, (498371), 135011 states have internal predecessors, (498371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:14,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135012 states to 135012 states and 498371 transitions. [2021-05-22 02:17:14,105 INFO L78 Accepts]: Start accepts. Automaton has 135012 states and 498371 transitions. Word has length 33 [2021-05-22 02:17:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:14,106 INFO L482 AbstractCegarLoop]: Abstraction has 135012 states and 498371 transitions. [2021-05-22 02:17:14,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 135012 states and 498371 transitions. [2021-05-22 02:17:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:15,114 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:15,114 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:15,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-05-22 02:17:15,329 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:15,329 INFO L82 PathProgramCache]: Analyzing trace with hash 516165646, now seen corresponding path program 157 times [2021-05-22 02:17:15,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:15,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974768686] [2021-05-22 02:17:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:15,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:15,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974768686] [2021-05-22 02:17:15,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974768686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:15,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060182398] [2021-05-22 02:17:15,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:15,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:17:15,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:15,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060182398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:15,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:15,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:17:15,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864311056] [2021-05-22 02:17:15,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:17:15,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:15,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:17:15,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:17:15,682 INFO L87 Difference]: Start difference. First operand 135012 states and 498371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:16,765 INFO L93 Difference]: Finished difference Result 135441 states and 499607 transitions. [2021-05-22 02:17:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:17:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:17,934 INFO L225 Difference]: With dead ends: 135441 [2021-05-22 02:17:17,934 INFO L226 Difference]: Without dead ends: 135329 [2021-05-22 02:17:17,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 374.1ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:17:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135329 states. [2021-05-22 02:17:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135329 to 135120. [2021-05-22 02:17:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135120 states, 135119 states have (on average 3.6909094945936545) internal successors, (498712), 135119 states have internal predecessors, (498712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135120 states to 135120 states and 498712 transitions. [2021-05-22 02:17:21,714 INFO L78 Accepts]: Start accepts. Automaton has 135120 states and 498712 transitions. Word has length 33 [2021-05-22 02:17:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:21,714 INFO L482 AbstractCegarLoop]: Abstraction has 135120 states and 498712 transitions. [2021-05-22 02:17:21,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 135120 states and 498712 transitions. [2021-05-22 02:17:21,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:21,999 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:21,999 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:22,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:22,200 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:22,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:22,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1371713326, now seen corresponding path program 158 times [2021-05-22 02:17:22,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:22,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292211330] [2021-05-22 02:17:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:22,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:22,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292211330] [2021-05-22 02:17:22,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292211330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:22,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955683270] [2021-05-22 02:17:22,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:22,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:17:22,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:17:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:17:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:22,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955683270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:22,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:22,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:17:22,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70690171] [2021-05-22 02:17:22,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:17:22,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:22,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:17:22,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:17:22,580 INFO L87 Difference]: Start difference. First operand 135120 states and 498712 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:24,331 INFO L93 Difference]: Finished difference Result 135711 states and 500369 transitions. [2021-05-22 02:17:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:17:24,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:24,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:24,808 INFO L225 Difference]: With dead ends: 135711 [2021-05-22 02:17:24,808 INFO L226 Difference]: Without dead ends: 135631 [2021-05-22 02:17:24,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:17:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135631 states. [2021-05-22 02:17:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135631 to 135275. [2021-05-22 02:17:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135275 states, 135274 states have (on average 3.690443100669752) internal successors, (499221), 135274 states have internal predecessors, (499221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135275 states to 135275 states and 499221 transitions. [2021-05-22 02:17:28,054 INFO L78 Accepts]: Start accepts. Automaton has 135275 states and 499221 transitions. Word has length 33 [2021-05-22 02:17:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:28,054 INFO L482 AbstractCegarLoop]: Abstraction has 135275 states and 499221 transitions. [2021-05-22 02:17:28,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:28,054 INFO L276 IsEmpty]: Start isEmpty. Operand 135275 states and 499221 transitions. [2021-05-22 02:17:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:28,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:28,329 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:28,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-22 02:17:28,530 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:28,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1177029994, now seen corresponding path program 159 times [2021-05-22 02:17:28,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:28,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913420769] [2021-05-22 02:17:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:28,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:28,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913420769] [2021-05-22 02:17:28,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913420769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:28,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111425756] [2021-05-22 02:17:28,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:28,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 02:17:28,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:17:28,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:17:28,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:29,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111425756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:29,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:29,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:17:29,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873053599] [2021-05-22 02:17:29,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:17:29,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:29,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:17:29,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:17:29,664 INFO L87 Difference]: Start difference. First operand 135275 states and 499221 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:30,796 INFO L93 Difference]: Finished difference Result 135676 states and 500356 transitions. [2021-05-22 02:17:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:17:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:31,216 INFO L225 Difference]: With dead ends: 135676 [2021-05-22 02:17:31,216 INFO L226 Difference]: Without dead ends: 135646 [2021-05-22 02:17:31,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1117.9ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:17:31,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135646 states. [2021-05-22 02:17:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135646 to 135346. [2021-05-22 02:17:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135346 states, 135345 states have (on average 3.690509438841479) internal successors, (499492), 135345 states have internal predecessors, (499492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135346 states to 135346 states and 499492 transitions. [2021-05-22 02:17:35,016 INFO L78 Accepts]: Start accepts. Automaton has 135346 states and 499492 transitions. Word has length 33 [2021-05-22 02:17:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:35,016 INFO L482 AbstractCegarLoop]: Abstraction has 135346 states and 499492 transitions. [2021-05-22 02:17:35,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 135346 states and 499492 transitions. [2021-05-22 02:17:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:35,341 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:35,341 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:35,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:35,542 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:35,542 INFO L82 PathProgramCache]: Analyzing trace with hash -588948574, now seen corresponding path program 160 times [2021-05-22 02:17:35,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:35,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632692790] [2021-05-22 02:17:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:35,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:35,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632692790] [2021-05-22 02:17:35,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632692790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:35,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17548147] [2021-05-22 02:17:35,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:35,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:17:35,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:17:35,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:17:35,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:35,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17548147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:35,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:35,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:17:35,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511347897] [2021-05-22 02:17:35,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:17:35,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:35,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:17:35,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:17:35,876 INFO L87 Difference]: Start difference. First operand 135346 states and 499492 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:37,575 INFO L93 Difference]: Finished difference Result 136007 states and 501349 transitions. [2021-05-22 02:17:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:17:37,575 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:37,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:38,017 INFO L225 Difference]: With dead ends: 136007 [2021-05-22 02:17:38,018 INFO L226 Difference]: Without dead ends: 135825 [2021-05-22 02:17:38,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:17:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135825 states. [2021-05-22 02:17:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135825 to 135578. [2021-05-22 02:17:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135578 states, 135577 states have (on average 3.6892393252542837) internal successors, (500176), 135577 states have internal predecessors, (500176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135578 states to 135578 states and 500176 transitions. [2021-05-22 02:17:41,344 INFO L78 Accepts]: Start accepts. Automaton has 135578 states and 500176 transitions. Word has length 33 [2021-05-22 02:17:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:41,344 INFO L482 AbstractCegarLoop]: Abstraction has 135578 states and 500176 transitions. [2021-05-22 02:17:41,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 135578 states and 500176 transitions. [2021-05-22 02:17:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:41,626 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:41,626 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:41,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-22 02:17:41,826 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1267056682, now seen corresponding path program 161 times [2021-05-22 02:17:41,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:41,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983338796] [2021-05-22 02:17:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:41,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:41,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983338796] [2021-05-22 02:17:41,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983338796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:41,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13940633] [2021-05-22 02:17:41,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:41,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:17:41,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:17:41,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:17:41,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:42,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13940633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:42,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:42,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:17:42,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354308512] [2021-05-22 02:17:42,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:17:42,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:42,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:17:42,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:17:42,198 INFO L87 Difference]: Start difference. First operand 135578 states and 500176 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:43,943 INFO L93 Difference]: Finished difference Result 136135 states and 501711 transitions. [2021-05-22 02:17:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:17:43,944 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:43,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:44,413 INFO L225 Difference]: With dead ends: 136135 [2021-05-22 02:17:44,414 INFO L226 Difference]: Without dead ends: 136008 [2021-05-22 02:17:44,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 365.2ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:17:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136008 states. [2021-05-22 02:17:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136008 to 135568. [2021-05-22 02:17:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135568 states, 135567 states have (on average 3.6892237786481963) internal successors, (500137), 135567 states have internal predecessors, (500137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135568 states to 135568 states and 500137 transitions. [2021-05-22 02:17:48,200 INFO L78 Accepts]: Start accepts. Automaton has 135568 states and 500137 transitions. Word has length 33 [2021-05-22 02:17:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:48,201 INFO L482 AbstractCegarLoop]: Abstraction has 135568 states and 500137 transitions. [2021-05-22 02:17:48,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 135568 states and 500137 transitions. [2021-05-22 02:17:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:49,341 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:49,341 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:49,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-22 02:17:49,542 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:49,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:49,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1810631706, now seen corresponding path program 162 times [2021-05-22 02:17:49,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:49,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497286461] [2021-05-22 02:17:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:17:49,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:49,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497286461] [2021-05-22 02:17:49,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497286461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:49,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978018401] [2021-05-22 02:17:49,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:49,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:17:49,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:17:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:17:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:49,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978018401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:49,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:49,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:17:49,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769144663] [2021-05-22 02:17:49,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:17:49,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:17:49,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:17:49,881 INFO L87 Difference]: Start difference. First operand 135568 states and 500137 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:51,029 INFO L93 Difference]: Finished difference Result 135962 states and 501194 transitions. [2021-05-22 02:17:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:17:51,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:51,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:52,172 INFO L225 Difference]: With dead ends: 135962 [2021-05-22 02:17:52,172 INFO L226 Difference]: Without dead ends: 135878 [2021-05-22 02:17:52,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:17:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135878 states. [2021-05-22 02:17:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135878 to 135615. [2021-05-22 02:17:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135615 states, 135614 states have (on average 3.689235624640524) internal successors, (500312), 135614 states have internal predecessors, (500312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135615 states to 135615 states and 500312 transitions. [2021-05-22 02:17:55,710 INFO L78 Accepts]: Start accepts. Automaton has 135615 states and 500312 transitions. Word has length 33 [2021-05-22 02:17:55,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:55,710 INFO L482 AbstractCegarLoop]: Abstraction has 135615 states and 500312 transitions. [2021-05-22 02:17:55,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand 135615 states and 500312 transitions. [2021-05-22 02:17:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:56,036 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:56,036 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:56,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:56,236 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:56,237 INFO L82 PathProgramCache]: Analyzing trace with hash 654578334, now seen corresponding path program 163 times [2021-05-22 02:17:56,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:56,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15399242] [2021-05-22 02:17:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:17:56,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:56,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15399242] [2021-05-22 02:17:56,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15399242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:56,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396679049] [2021-05-22 02:17:56,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:56,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:17:56,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:56,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396679049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:56,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:56,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:17:56,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681473117] [2021-05-22 02:17:56,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:17:56,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:56,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:17:56,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:17:56,595 INFO L87 Difference]: Start difference. First operand 135615 states and 500312 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:58,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:58,373 INFO L93 Difference]: Finished difference Result 136030 states and 501487 transitions. [2021-05-22 02:17:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:17:58,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:58,859 INFO L225 Difference]: With dead ends: 136030 [2021-05-22 02:17:58,859 INFO L226 Difference]: Without dead ends: 136000 [2021-05-22 02:17:58,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 345.9ms TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:17:59,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136000 states. [2021-05-22 02:18:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136000 to 135676. [2021-05-22 02:18:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135676 states, 135675 states have (on average 3.689272157729869) internal successors, (500542), 135675 states have internal predecessors, (500542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:02,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135676 states to 135676 states and 500542 transitions. [2021-05-22 02:18:02,179 INFO L78 Accepts]: Start accepts. Automaton has 135676 states and 500542 transitions. Word has length 33 [2021-05-22 02:18:02,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:02,179 INFO L482 AbstractCegarLoop]: Abstraction has 135676 states and 500542 transitions. [2021-05-22 02:18:02,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand 135676 states and 500542 transitions. [2021-05-22 02:18:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:02,460 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:02,460 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:02,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:02,673 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1745873050, now seen corresponding path program 164 times [2021-05-22 02:18:02,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:02,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888881897] [2021-05-22 02:18:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:02,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:02,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888881897] [2021-05-22 02:18:02,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888881897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:02,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400802589] [2021-05-22 02:18:02,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:02,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:18:02,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:02,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:18:02,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:03,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400802589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:03,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:03,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:18:03,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227154995] [2021-05-22 02:18:03,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:18:03,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:03,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:18:03,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:18:03,004 INFO L87 Difference]: Start difference. First operand 135676 states and 500542 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:04,572 INFO L93 Difference]: Finished difference Result 135970 states and 501235 transitions. [2021-05-22 02:18:04,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:18:04,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:18:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:04,959 INFO L225 Difference]: With dead ends: 135970 [2021-05-22 02:18:04,959 INFO L226 Difference]: Without dead ends: 135812 [2021-05-22 02:18:04,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:18:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135812 states. [2021-05-22 02:18:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135812 to 135650. [2021-05-22 02:18:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135650 states, 135649 states have (on average 3.6883869398226303) internal successors, (500326), 135649 states have internal predecessors, (500326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135650 states to 135650 states and 500326 transitions. [2021-05-22 02:18:08,252 INFO L78 Accepts]: Start accepts. Automaton has 135650 states and 500326 transitions. Word has length 33 [2021-05-22 02:18:08,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:08,252 INFO L482 AbstractCegarLoop]: Abstraction has 135650 states and 500326 transitions. [2021-05-22 02:18:08,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:08,252 INFO L276 IsEmpty]: Start isEmpty. Operand 135650 states and 500326 transitions. [2021-05-22 02:18:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:09,149 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:09,149 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:09,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-05-22 02:18:09,365 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:09,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1141614370, now seen corresponding path program 165 times [2021-05-22 02:18:09,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:09,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144518160] [2021-05-22 02:18:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:09,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:09,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144518160] [2021-05-22 02:18:09,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144518160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:09,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298188479] [2021-05-22 02:18:09,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:09,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:18:09,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:09,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:18:09,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:09,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298188479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:09,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:09,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:18:09,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606797839] [2021-05-22 02:18:09,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:18:09,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:09,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:18:09,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:18:09,717 INFO L87 Difference]: Start difference. First operand 135650 states and 500326 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:10,885 INFO L93 Difference]: Finished difference Result 136261 states and 501957 transitions. [2021-05-22 02:18:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:18:10,885 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:18:10,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:11,894 INFO L225 Difference]: With dead ends: 136261 [2021-05-22 02:18:11,894 INFO L226 Difference]: Without dead ends: 136063 [2021-05-22 02:18:11,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:18:12,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136063 states. [2021-05-22 02:18:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136063 to 135852. [2021-05-22 02:18:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135852 states, 135851 states have (on average 3.6868628129347596) internal successors, (500864), 135851 states have internal predecessors, (500864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135852 states to 135852 states and 500864 transitions. [2021-05-22 02:18:15,152 INFO L78 Accepts]: Start accepts. Automaton has 135852 states and 500864 transitions. Word has length 33 [2021-05-22 02:18:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:15,152 INFO L482 AbstractCegarLoop]: Abstraction has 135852 states and 500864 transitions. [2021-05-22 02:18:15,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 135852 states and 500864 transitions. [2021-05-22 02:18:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:15,448 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:15,448 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:15,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:15,648 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:15,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:15,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1527145246, now seen corresponding path program 166 times [2021-05-22 02:18:15,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:15,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260507371] [2021-05-22 02:18:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:15,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:15,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260507371] [2021-05-22 02:18:15,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260507371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:15,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878252319] [2021-05-22 02:18:15,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:15,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:18:15,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:15,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:18:15,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:15,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878252319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:15,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:15,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:18:15,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750331937] [2021-05-22 02:18:15,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:18:15,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:18:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:18:15,988 INFO L87 Difference]: Start difference. First operand 135852 states and 500864 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:17,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:17,585 INFO L93 Difference]: Finished difference Result 136405 states and 502442 transitions. [2021-05-22 02:18:17,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:18:17,586 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:18:17,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:18,067 INFO L225 Difference]: With dead ends: 136405 [2021-05-22 02:18:18,067 INFO L226 Difference]: Without dead ends: 136263 [2021-05-22 02:18:18,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:18:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136263 states. [2021-05-22 02:18:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136263 to 136063. [2021-05-22 02:18:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136063 states, 136062 states have (on average 3.6861283826490863) internal successors, (501542), 136062 states have internal predecessors, (501542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136063 states to 136063 states and 501542 transitions. [2021-05-22 02:18:21,246 INFO L78 Accepts]: Start accepts. Automaton has 136063 states and 501542 transitions. Word has length 33 [2021-05-22 02:18:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:21,246 INFO L482 AbstractCegarLoop]: Abstraction has 136063 states and 501542 transitions. [2021-05-22 02:18:21,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 136063 states and 501542 transitions. [2021-05-22 02:18:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:21,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:21,510 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:21,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:21,710 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:21,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:21,710 INFO L82 PathProgramCache]: Analyzing trace with hash 966556586, now seen corresponding path program 167 times [2021-05-22 02:18:21,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:21,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479198188] [2021-05-22 02:18:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:21,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:21,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479198188] [2021-05-22 02:18:21,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479198188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:21,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079127248] [2021-05-22 02:18:21,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:21,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:18:21,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:18:21,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:22,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079127248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:22,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:22,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:18:22,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497738423] [2021-05-22 02:18:22,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:18:22,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:22,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:18:22,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:18:22,039 INFO L87 Difference]: Start difference. First operand 136063 states and 501542 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:23,618 INFO L93 Difference]: Finished difference Result 136463 states and 502600 transitions. [2021-05-22 02:18:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:18:23,618 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:18:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:24,017 INFO L225 Difference]: With dead ends: 136463 [2021-05-22 02:18:24,017 INFO L226 Difference]: Without dead ends: 136357 [2021-05-22 02:18:24,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:18:24,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136357 states. [2021-05-22 02:18:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136357 to 136175. [2021-05-22 02:18:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136175 states, 136174 states have (on average 3.6854759352005524) internal successors, (501866), 136174 states have internal predecessors, (501866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136175 states to 136175 states and 501866 transitions. [2021-05-22 02:18:27,252 INFO L78 Accepts]: Start accepts. Automaton has 136175 states and 501866 transitions. Word has length 33 [2021-05-22 02:18:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:27,252 INFO L482 AbstractCegarLoop]: Abstraction has 136175 states and 501866 transitions. [2021-05-22 02:18:27,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 136175 states and 501866 transitions. [2021-05-22 02:18:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:28,315 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:28,315 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:28,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:28,540 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1161239918, now seen corresponding path program 168 times [2021-05-22 02:18:28,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:28,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400688654] [2021-05-22 02:18:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:28,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:28,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400688654] [2021-05-22 02:18:28,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400688654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:28,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817975959] [2021-05-22 02:18:28,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:28,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-22 02:18:28,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:28,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:18:28,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:28,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817975959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:28,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:28,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:18:28,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763228063] [2021-05-22 02:18:28,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:18:28,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:28,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:18:28,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:18:28,886 INFO L87 Difference]: Start difference. First operand 136175 states and 501866 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:30,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:30,065 INFO L93 Difference]: Finished difference Result 136837 states and 503693 transitions. [2021-05-22 02:18:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:18:30,065 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:18:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:31,212 INFO L225 Difference]: With dead ends: 136837 [2021-05-22 02:18:31,212 INFO L226 Difference]: Without dead ends: 136710 [2021-05-22 02:18:31,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:18:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136710 states. [2021-05-22 02:18:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136710 to 136135. [2021-05-22 02:18:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136135 states, 136134 states have (on average 3.686360497744869) internal successors, (501839), 136134 states have internal predecessors, (501839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136135 states to 136135 states and 501839 transitions. [2021-05-22 02:18:34,747 INFO L78 Accepts]: Start accepts. Automaton has 136135 states and 501839 transitions. Word has length 33 [2021-05-22 02:18:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:34,747 INFO L482 AbstractCegarLoop]: Abstraction has 136135 states and 501839 transitions. [2021-05-22 02:18:34,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 136135 states and 501839 transitions. [2021-05-22 02:18:35,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:35,051 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:35,051 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:35,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-05-22 02:18:35,252 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:35,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1704814942, now seen corresponding path program 169 times [2021-05-22 02:18:35,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:35,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842148430] [2021-05-22 02:18:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:18:35,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:35,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842148430] [2021-05-22 02:18:35,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842148430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:35,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849890441] [2021-05-22 02:18:35,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:35,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:18:35,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:35,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849890441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:35,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:35,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:18:35,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034287407] [2021-05-22 02:18:35,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:18:35,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:35,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:18:35,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:18:35,593 INFO L87 Difference]: Start difference. First operand 136135 states and 501839 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:37,492 INFO L93 Difference]: Finished difference Result 136552 states and 502951 transitions. [2021-05-22 02:18:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:18:37,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:18:37,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:38,252 INFO L225 Difference]: With dead ends: 136552 [2021-05-22 02:18:38,252 INFO L226 Difference]: Without dead ends: 136408 [2021-05-22 02:18:38,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:18:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136408 states. [2021-05-22 02:18:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136408 to 136224. [2021-05-22 02:18:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136224 states, 136223 states have (on average 3.6858460025105892) internal successors, (502097), 136223 states have internal predecessors, (502097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136224 states to 136224 states and 502097 transitions. [2021-05-22 02:18:41,903 INFO L78 Accepts]: Start accepts. Automaton has 136224 states and 502097 transitions. Word has length 33 [2021-05-22 02:18:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:41,904 INFO L482 AbstractCegarLoop]: Abstraction has 136224 states and 502097 transitions. [2021-05-22 02:18:41,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:41,904 INFO L276 IsEmpty]: Start isEmpty. Operand 136224 states and 502097 transitions. [2021-05-22 02:18:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:42,189 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:42,189 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:42,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:42,390 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash 548761570, now seen corresponding path program 170 times [2021-05-22 02:18:42,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:42,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44129436] [2021-05-22 02:18:42,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:18:42,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44129436] [2021-05-22 02:18:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44129436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696391819] [2021-05-22 02:18:42,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:42,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:18:42,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:42,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:18:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:42,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696391819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:42,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:42,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:18:42,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782127750] [2021-05-22 02:18:42,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:18:42,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:18:42,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:18:42,722 INFO L87 Difference]: Start difference. First operand 136224 states and 502097 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:44,497 INFO L93 Difference]: Finished difference Result 136817 states and 503721 transitions. [2021-05-22 02:18:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:18:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:18:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:44,930 INFO L225 Difference]: With dead ends: 136817 [2021-05-22 02:18:44,930 INFO L226 Difference]: Without dead ends: 136702 [2021-05-22 02:18:44,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:18:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136702 states. [2021-05-22 02:18:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136702 to 136321. [2021-05-22 02:18:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136321 states, 136320 states have (on average 3.68581279342723) internal successors, (502450), 136320 states have internal predecessors, (502450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136321 states to 136321 states and 502450 transitions. [2021-05-22 02:18:48,244 INFO L78 Accepts]: Start accepts. Automaton has 136321 states and 502450 transitions. Word has length 33 [2021-05-22 02:18:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:48,244 INFO L482 AbstractCegarLoop]: Abstraction has 136321 states and 502450 transitions. [2021-05-22 02:18:48,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 136321 states and 502450 transitions. [2021-05-22 02:18:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:49,205 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:49,205 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:49,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-22 02:18:49,406 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:49,406 INFO L82 PathProgramCache]: Analyzing trace with hash 308801818, now seen corresponding path program 171 times [2021-05-22 02:18:49,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:49,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226370557] [2021-05-22 02:18:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:49,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:49,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226370557] [2021-05-22 02:18:49,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226370557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:49,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090654098] [2021-05-22 02:18:49,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:49,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:18:49,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:49,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:18:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:49,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090654098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:49,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:49,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:18:49,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549974657] [2021-05-22 02:18:49,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:18:49,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:49,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:18:49,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:18:49,760 INFO L87 Difference]: Start difference. First operand 136321 states and 502450 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:50,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:50,731 INFO L93 Difference]: Finished difference Result 136671 states and 503372 transitions. [2021-05-22 02:18:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:18:50,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:18:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:51,183 INFO L225 Difference]: With dead ends: 136671 [2021-05-22 02:18:51,183 INFO L226 Difference]: Without dead ends: 136497 [2021-05-22 02:18:51,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:18:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136497 states. [2021-05-22 02:18:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136497 to 136433. [2021-05-22 02:18:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136433 states, 136432 states have (on average 3.6851911574997067) internal successors, (502778), 136432 states have internal predecessors, (502778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136433 states to 136433 states and 502778 transitions. [2021-05-22 02:18:55,021 INFO L78 Accepts]: Start accepts. Automaton has 136433 states and 502778 transitions. Word has length 33 [2021-05-22 02:18:55,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:55,021 INFO L482 AbstractCegarLoop]: Abstraction has 136433 states and 502778 transitions. [2021-05-22 02:18:55,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 136433 states and 502778 transitions. [2021-05-22 02:18:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:55,395 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:55,395 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:55,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-22 02:18:55,596 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1656613022, now seen corresponding path program 172 times [2021-05-22 02:18:55,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:55,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152075838] [2021-05-22 02:18:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:55,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:55,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152075838] [2021-05-22 02:18:55,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152075838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:55,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813101957] [2021-05-22 02:18:55,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:55,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:18:55,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:18:55,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:55,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813101957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:55,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:55,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:18:55,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221570735] [2021-05-22 02:18:55,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:18:55,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:55,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:18:55,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:18:55,932 INFO L87 Difference]: Start difference. First operand 136433 states and 502778 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:57,747 INFO L93 Difference]: Finished difference Result 136787 states and 503684 transitions. [2021-05-22 02:18:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:18:57,747 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:18:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:58,198 INFO L225 Difference]: With dead ends: 136787 [2021-05-22 02:18:58,198 INFO L226 Difference]: Without dead ends: 136633 [2021-05-22 02:18:58,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:18:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136633 states. [2021-05-22 02:19:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136633 to 136417. [2021-05-22 02:19:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136417 states, 136416 states have (on average 3.6851322425521933) internal successors, (502711), 136416 states have internal predecessors, (502711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136417 states to 136417 states and 502711 transitions. [2021-05-22 02:19:01,415 INFO L78 Accepts]: Start accepts. Automaton has 136417 states and 502711 transitions. Word has length 33 [2021-05-22 02:19:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:19:01,415 INFO L482 AbstractCegarLoop]: Abstraction has 136417 states and 502711 transitions. [2021-05-22 02:19:01,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 136417 states and 502711 transitions. [2021-05-22 02:19:01,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:19:01,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:19:01,668 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:19:01,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:01,869 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:19:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:19:01,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1189214166, now seen corresponding path program 173 times [2021-05-22 02:19:01,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:19:01,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19877321] [2021-05-22 02:19:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:19:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:01,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:19:01,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19877321] [2021-05-22 02:19:01,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19877321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:01,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939874260] [2021-05-22 02:19:01,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:01,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-22 02:19:01,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:19:01,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:19:01,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:19:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:02,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939874260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:02,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:19:02,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:19:02,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205393276] [2021-05-22 02:19:02,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:19:02,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:19:02,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:19:02,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:19:02,195 INFO L87 Difference]: Start difference. First operand 136417 states and 502711 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:03,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:19:03,858 INFO L93 Difference]: Finished difference Result 137004 states and 504307 transitions. [2021-05-22 02:19:03,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:19:03,859 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:19:03,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:19:04,285 INFO L225 Difference]: With dead ends: 137004 [2021-05-22 02:19:04,285 INFO L226 Difference]: Without dead ends: 136877 [2021-05-22 02:19:04,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:19:04,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136877 states. [2021-05-22 02:19:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136877 to 136498. [2021-05-22 02:19:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136498 states, 136497 states have (on average 3.6851652417269243) internal successors, (503014), 136497 states have internal predecessors, (503014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136498 states to 136498 states and 503014 transitions. [2021-05-22 02:19:07,511 INFO L78 Accepts]: Start accepts. Automaton has 136498 states and 503014 transitions. Word has length 33 [2021-05-22 02:19:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:19:07,511 INFO L482 AbstractCegarLoop]: Abstraction has 136498 states and 503014 transitions. [2021-05-22 02:19:07,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 136498 states and 503014 transitions. [2021-05-22 02:19:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:19:08,421 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:19:08,421 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:19:08,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-05-22 02:19:08,645 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:19:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:19:08,645 INFO L82 PathProgramCache]: Analyzing trace with hash -323997470, now seen corresponding path program 174 times [2021-05-22 02:19:08,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:19:08,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352890475] [2021-05-22 02:19:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:19:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:19:08,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:19:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352890475] [2021-05-22 02:19:08,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352890475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:08,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800939626] [2021-05-22 02:19:08,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:08,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-22 02:19:08,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:19:08,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:19:08,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:19:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:08,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800939626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:08,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:19:08,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:19:08,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434504072] [2021-05-22 02:19:08,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:19:08,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:19:08,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:19:08,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:19:08,992 INFO L87 Difference]: Start difference. First operand 136498 states and 503014 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:19:10,011 INFO L93 Difference]: Finished difference Result 137151 states and 504800 transitions. [2021-05-22 02:19:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:19:10,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:19:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:19:10,409 INFO L225 Difference]: With dead ends: 137151 [2021-05-22 02:19:10,409 INFO L226 Difference]: Without dead ends: 137008 [2021-05-22 02:19:10,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:19:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137008 states. [2021-05-22 02:19:13,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137008 to 136605. [2021-05-22 02:19:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136605 states, 136604 states have (on average 3.685111709759597) internal successors, (503401), 136604 states have internal predecessors, (503401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136605 states to 136605 states and 503401 transitions. [2021-05-22 02:19:14,396 INFO L78 Accepts]: Start accepts. Automaton has 136605 states and 503401 transitions. Word has length 33 [2021-05-22 02:19:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:19:14,396 INFO L482 AbstractCegarLoop]: Abstraction has 136605 states and 503401 transitions. [2021-05-22 02:19:14,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 136605 states and 503401 transitions. [2021-05-22 02:19:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:19:14,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:19:14,666 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:19:14,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:14,866 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:19:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:19:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash 740825498, now seen corresponding path program 175 times [2021-05-22 02:19:14,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:19:14,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059333599] [2021-05-22 02:19:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:19:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:14,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:19:14,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059333599] [2021-05-22 02:19:14,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059333599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:14,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406631731] [2021-05-22 02:19:14,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:14,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:19:14,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:19:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:15,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406631731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:15,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:19:15,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:19:15,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873697311] [2021-05-22 02:19:15,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:19:15,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:19:15,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:19:15,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:19:15,190 INFO L87 Difference]: Start difference. First operand 136605 states and 503401 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:19:16,814 INFO L93 Difference]: Finished difference Result 137345 states and 505531 transitions. [2021-05-22 02:19:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:19:16,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:19:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:19:17,273 INFO L225 Difference]: With dead ends: 137345 [2021-05-22 02:19:17,274 INFO L226 Difference]: Without dead ends: 137202 [2021-05-22 02:19:17,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:19:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137202 states. [2021-05-22 02:19:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137202 to 136759. [2021-05-22 02:19:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136759 states, 136758 states have (on average 3.6850348791295575) internal successors, (503958), 136758 states have internal predecessors, (503958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136759 states to 136759 states and 503958 transitions. [2021-05-22 02:19:20,474 INFO L78 Accepts]: Start accepts. Automaton has 136759 states and 503958 transitions. Word has length 33 [2021-05-22 02:19:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:19:20,474 INFO L482 AbstractCegarLoop]: Abstraction has 136759 states and 503958 transitions. [2021-05-22 02:19:20,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 136759 states and 503958 transitions. [2021-05-22 02:19:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:19:20,758 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:19:20,758 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:19:20,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-05-22 02:19:20,959 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:19:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:19:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2124902626, now seen corresponding path program 176 times [2021-05-22 02:19:20,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:19:20,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859012064] [2021-05-22 02:19:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:19:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:21,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:19:21,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859012064] [2021-05-22 02:19:21,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859012064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:21,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977363565] [2021-05-22 02:19:21,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:21,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:19:21,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:19:21,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:19:21,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:19:21,723 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-22 02:19:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:22,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977363565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:22,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:19:22,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:19:22,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122404709] [2021-05-22 02:19:22,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:19:22,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:19:22,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:19:22,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:19:22,014 INFO L87 Difference]: Start difference. First operand 136759 states and 503958 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:19:23,025 INFO L93 Difference]: Finished difference Result 137461 states and 505914 transitions. [2021-05-22 02:19:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:19:23,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:19:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:19:23,482 INFO L225 Difference]: With dead ends: 137461 [2021-05-22 02:19:23,482 INFO L226 Difference]: Without dead ends: 137356 [2021-05-22 02:19:23,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:19:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137356 states. [2021-05-22 02:19:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137356 to 136882. [2021-05-22 02:19:26,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136882 states, 136881 states have (on average 3.685040290471285) internal successors, (504412), 136881 states have internal predecessors, (504412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136882 states to 136882 states and 504412 transitions. [2021-05-22 02:19:27,664 INFO L78 Accepts]: Start accepts. Automaton has 136882 states and 504412 transitions. Word has length 33 [2021-05-22 02:19:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:19:27,668 INFO L482 AbstractCegarLoop]: Abstraction has 136882 states and 504412 transitions. [2021-05-22 02:19:27,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:27,669 INFO L276 IsEmpty]: Start isEmpty. Operand 136882 states and 504412 transitions. [2021-05-22 02:19:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:19:27,978 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:19:27,978 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:19:28,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:28,179 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:19:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:19:28,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1248276962, now seen corresponding path program 177 times [2021-05-22 02:19:28,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:19:28,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406712356] [2021-05-22 02:19:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:19:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:28,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:19:28,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406712356] [2021-05-22 02:19:28,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406712356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:28,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836901773] [2021-05-22 02:19:28,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:28,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:19:28,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:19:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:19:28,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:19:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:28,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836901773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:28,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:19:28,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:19:28,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979119276] [2021-05-22 02:19:28,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:19:28,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:19:28,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:19:28,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:19:28,525 INFO L87 Difference]: Start difference. First operand 136882 states and 504412 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:19:30,368 INFO L93 Difference]: Finished difference Result 138201 states and 508135 transitions. [2021-05-22 02:19:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:19:30,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:19:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:19:31,294 INFO L225 Difference]: With dead ends: 138201 [2021-05-22 02:19:31,294 INFO L226 Difference]: Without dead ends: 138065 [2021-05-22 02:19:31,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:19:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138065 states. [2021-05-22 02:19:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138065 to 136923. [2021-05-22 02:19:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136923 states, 136922 states have (on average 3.6860110135697695) internal successors, (504696), 136922 states have internal predecessors, (504696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136923 states to 136923 states and 504696 transitions. [2021-05-22 02:19:35,003 INFO L78 Accepts]: Start accepts. Automaton has 136923 states and 504696 transitions. Word has length 33 [2021-05-22 02:19:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:19:35,003 INFO L482 AbstractCegarLoop]: Abstraction has 136923 states and 504696 transitions. [2021-05-22 02:19:35,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 136923 states and 504696 transitions. [2021-05-22 02:19:35,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:19:35,280 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:19:35,280 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:19:35,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:35,481 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:19:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:19:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash -960276966, now seen corresponding path program 178 times [2021-05-22 02:19:35,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:19:35,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792797723] [2021-05-22 02:19:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:19:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:35,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:19:35,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792797723] [2021-05-22 02:19:35,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792797723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:35,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053359838] [2021-05-22 02:19:35,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:35,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:19:35,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:19:35,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:19:35,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:19:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:35,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053359838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:35,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:19:35,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:19:35,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15775549] [2021-05-22 02:19:35,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:19:35,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:19:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:19:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:19:35,845 INFO L87 Difference]: Start difference. First operand 136923 states and 504696 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:37,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:19:37,426 INFO L93 Difference]: Finished difference Result 137357 states and 505946 transitions. [2021-05-22 02:19:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:19:37,426 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:19:37,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:19:37,876 INFO L225 Difference]: With dead ends: 137357 [2021-05-22 02:19:37,876 INFO L226 Difference]: Without dead ends: 137275 [2021-05-22 02:19:37,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:19:38,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137275 states. [2021-05-22 02:19:40,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137275 to 136972. [2021-05-22 02:19:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136972 states, 136971 states have (on average 3.6859627220360514) internal successors, (504870), 136971 states have internal predecessors, (504870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136972 states to 136972 states and 504870 transitions. [2021-05-22 02:19:41,142 INFO L78 Accepts]: Start accepts. Automaton has 136972 states and 504870 transitions. Word has length 33 [2021-05-22 02:19:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:19:41,142 INFO L482 AbstractCegarLoop]: Abstraction has 136972 states and 504870 transitions. [2021-05-22 02:19:41,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 136972 states and 504870 transitions. [2021-05-22 02:19:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:19:42,057 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:19:42,057 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:19:42,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:42,258 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:19:42,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:19:42,258 INFO L82 PathProgramCache]: Analyzing trace with hash 963765726, now seen corresponding path program 179 times [2021-05-22 02:19:42,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:19:42,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187708350] [2021-05-22 02:19:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:19:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:42,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:19:42,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187708350] [2021-05-22 02:19:42,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187708350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:42,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666303614] [2021-05-22 02:19:42,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:42,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:19:42,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:19:42,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:19:42,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:19:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:42,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666303614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:42,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:19:42,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:19:42,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888931423] [2021-05-22 02:19:42,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:19:42,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:19:42,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:19:42,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:19:42,610 INFO L87 Difference]: Start difference. First operand 136972 states and 504870 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:19:43,577 INFO L93 Difference]: Finished difference Result 137654 states and 506819 transitions. [2021-05-22 02:19:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:19:43,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:19:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:19:44,055 INFO L225 Difference]: With dead ends: 137654 [2021-05-22 02:19:44,055 INFO L226 Difference]: Without dead ends: 137544 [2021-05-22 02:19:44,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:19:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137544 states. [2021-05-22 02:19:46,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137544 to 137016. [2021-05-22 02:19:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137016 states, 137015 states have (on average 3.6854650950625842) internal successors, (504964), 137015 states have internal predecessors, (504964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137016 states to 137016 states and 504964 transitions. [2021-05-22 02:19:48,166 INFO L78 Accepts]: Start accepts. Automaton has 137016 states and 504964 transitions. Word has length 33 [2021-05-22 02:19:48,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:19:48,166 INFO L482 AbstractCegarLoop]: Abstraction has 137016 states and 504964 transitions. [2021-05-22 02:19:48,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:48,166 INFO L276 IsEmpty]: Start isEmpty. Operand 137016 states and 504964 transitions. [2021-05-22 02:19:48,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:19:48,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:19:48,474 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:19:48,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:48,678 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:19:48,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:19:48,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1018587486, now seen corresponding path program 180 times [2021-05-22 02:19:48,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:19:48,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194629316] [2021-05-22 02:19:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:19:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:48,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:19:48,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194629316] [2021-05-22 02:19:48,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194629316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:48,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798096537] [2021-05-22 02:19:48,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:48,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:19:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:19:48,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:19:48,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:19:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:49,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798096537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:49,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:19:49,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:19:49,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667917738] [2021-05-22 02:19:49,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:19:49,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:19:49,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:19:49,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:19:49,176 INFO L87 Difference]: Start difference. First operand 137016 states and 504964 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:19:50,810 INFO L93 Difference]: Finished difference Result 137774 states and 507159 transitions. [2021-05-22 02:19:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:19:50,811 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:19:50,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:19:51,252 INFO L225 Difference]: With dead ends: 137774 [2021-05-22 02:19:51,252 INFO L226 Difference]: Without dead ends: 137632 [2021-05-22 02:19:51,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 370.2ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:19:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137632 states. [2021-05-22 02:19:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137632 to 137314. [2021-05-22 02:19:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137314 states, 137313 states have (on average 3.6842760700006556) internal successors, (505899), 137313 states have internal predecessors, (505899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:54,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137314 states to 137314 states and 505899 transitions. [2021-05-22 02:19:54,476 INFO L78 Accepts]: Start accepts. Automaton has 137314 states and 505899 transitions. Word has length 33 [2021-05-22 02:19:54,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:19:54,476 INFO L482 AbstractCegarLoop]: Abstraction has 137314 states and 505899 transitions. [2021-05-22 02:19:54,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 137314 states and 505899 transitions. [2021-05-22 02:19:54,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:19:54,763 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:19:54,763 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:19:54,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-05-22 02:19:54,964 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:19:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:19:54,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2060260002, now seen corresponding path program 181 times [2021-05-22 02:19:54,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:19:54,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919638681] [2021-05-22 02:19:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:19:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:55,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:19:55,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919638681] [2021-05-22 02:19:55,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919638681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:55,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297011036] [2021-05-22 02:19:55,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:55,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:19:55,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:19:55,884 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-05-22 02:19:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:56,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297011036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:56,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:19:56,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:19:56,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981601673] [2021-05-22 02:19:56,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:19:56,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:19:56,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:19:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:19:56,010 INFO L87 Difference]: Start difference. First operand 137314 states and 505899 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:19:57,079 INFO L93 Difference]: Finished difference Result 138356 states and 508861 transitions. [2021-05-22 02:19:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:19:57,079 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:19:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:19:57,534 INFO L225 Difference]: With dead ends: 138356 [2021-05-22 02:19:57,535 INFO L226 Difference]: Without dead ends: 138306 [2021-05-22 02:19:57,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 952.3ms TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:19:57,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138306 states. [2021-05-22 02:20:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138306 to 137637. [2021-05-22 02:20:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137637 states, 137636 states have (on average 3.6833241303147433) internal successors, (506958), 137636 states have internal predecessors, (506958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137637 states to 137637 states and 506958 transitions. [2021-05-22 02:20:01,626 INFO L78 Accepts]: Start accepts. Automaton has 137637 states and 506958 transitions. Word has length 33 [2021-05-22 02:20:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:01,626 INFO L482 AbstractCegarLoop]: Abstraction has 137637 states and 506958 transitions. [2021-05-22 02:20:01,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 137637 states and 506958 transitions. [2021-05-22 02:20:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:20:02,014 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:02,014 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:02,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-22 02:20:02,214 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:02,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:02,215 INFO L82 PathProgramCache]: Analyzing trace with hash -138504034, now seen corresponding path program 182 times [2021-05-22 02:20:02,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:02,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394134207] [2021-05-22 02:20:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:02,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:02,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394134207] [2021-05-22 02:20:02,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394134207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:02,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624883819] [2021-05-22 02:20:02,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:02,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:20:02,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:02,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:02,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624883819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:02,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:02,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:20:02,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587250165] [2021-05-22 02:20:02,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:20:02,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:02,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:20:02,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:20:02,689 INFO L87 Difference]: Start difference. First operand 137637 states and 506958 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:04,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:04,392 INFO L93 Difference]: Finished difference Result 138581 states and 509568 transitions. [2021-05-22 02:20:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:20:04,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:20:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:04,888 INFO L225 Difference]: With dead ends: 138581 [2021-05-22 02:20:04,888 INFO L226 Difference]: Without dead ends: 138407 [2021-05-22 02:20:04,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 354.4ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:20:05,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138407 states. [2021-05-22 02:20:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138407 to 138053. [2021-05-22 02:20:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138053 states, 138052 states have (on average 3.681779329528004) internal successors, (508277), 138052 states have internal predecessors, (508277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138053 states to 138053 states and 508277 transitions. [2021-05-22 02:20:08,191 INFO L78 Accepts]: Start accepts. Automaton has 138053 states and 508277 transitions. Word has length 33 [2021-05-22 02:20:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:08,191 INFO L482 AbstractCegarLoop]: Abstraction has 138053 states and 508277 transitions. [2021-05-22 02:20:08,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 138053 states and 508277 transitions. [2021-05-22 02:20:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:20:08,476 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:08,476 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:08,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-05-22 02:20:08,681 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:08,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:08,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1821858026, now seen corresponding path program 183 times [2021-05-22 02:20:08,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:08,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105738319] [2021-05-22 02:20:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:08,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:08,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105738319] [2021-05-22 02:20:08,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105738319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:08,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506276400] [2021-05-22 02:20:08,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:08,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:20:08,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:08,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:08,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:09,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506276400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:09,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:09,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:20:09,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686991459] [2021-05-22 02:20:09,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:20:09,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:20:09,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:20:09,024 INFO L87 Difference]: Start difference. First operand 138053 states and 508277 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:09,643 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-05-22 02:20:10,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:10,571 INFO L93 Difference]: Finished difference Result 138483 states and 509458 transitions. [2021-05-22 02:20:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:20:10,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:20:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:10,982 INFO L225 Difference]: With dead ends: 138483 [2021-05-22 02:20:10,982 INFO L226 Difference]: Without dead ends: 138301 [2021-05-22 02:20:10,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 930.7ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:20:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138301 states. [2021-05-22 02:20:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138301 to 138093. [2021-05-22 02:20:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138093 states, 138092 states have (on average 3.6815239115951686) internal successors, (508389), 138092 states have internal predecessors, (508389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138093 states to 138093 states and 508389 transitions. [2021-05-22 02:20:14,904 INFO L78 Accepts]: Start accepts. Automaton has 138093 states and 508389 transitions. Word has length 33 [2021-05-22 02:20:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:14,905 INFO L482 AbstractCegarLoop]: Abstraction has 138093 states and 508389 transitions. [2021-05-22 02:20:14,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 138093 states and 508389 transitions. [2021-05-22 02:20:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:20:15,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:15,362 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:15,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:15,565 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:15,565 INFO L82 PathProgramCache]: Analyzing trace with hash -137840346, now seen corresponding path program 184 times [2021-05-22 02:20:15,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:15,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798243080] [2021-05-22 02:20:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:15,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:15,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798243080] [2021-05-22 02:20:15,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798243080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:15,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345634231] [2021-05-22 02:20:15,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:15,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:20:15,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:15,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:15,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345634231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:15,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:15,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:20:15,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246093969] [2021-05-22 02:20:15,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:20:15,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:15,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:20:15,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:20:15,989 INFO L87 Difference]: Start difference. First operand 138093 states and 508389 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:16,903 INFO L93 Difference]: Finished difference Result 138781 states and 510361 transitions. [2021-05-22 02:20:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:20:16,903 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:20:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:18,050 INFO L225 Difference]: With dead ends: 138781 [2021-05-22 02:20:18,050 INFO L226 Difference]: Without dead ends: 138699 [2021-05-22 02:20:18,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:20:18,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138699 states. [2021-05-22 02:20:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138699 to 138281. [2021-05-22 02:20:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138281 states, 138280 states have (on average 3.6812481920740527) internal successors, (509043), 138280 states have internal predecessors, (509043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138281 states to 138281 states and 509043 transitions. [2021-05-22 02:20:21,385 INFO L78 Accepts]: Start accepts. Automaton has 138281 states and 509043 transitions. Word has length 33 [2021-05-22 02:20:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:21,385 INFO L482 AbstractCegarLoop]: Abstraction has 138281 states and 509043 transitions. [2021-05-22 02:20:21,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 138281 states and 509043 transitions. [2021-05-22 02:20:21,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:20:21,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:21,668 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:21,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:21,869 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:21,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1939105810, now seen corresponding path program 185 times [2021-05-22 02:20:21,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:21,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639292058] [2021-05-22 02:20:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:21,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:21,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639292058] [2021-05-22 02:20:21,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639292058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:21,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662933818] [2021-05-22 02:20:21,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:21,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:20:21,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:21,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:22,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662933818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:22,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:22,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:20:22,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681191503] [2021-05-22 02:20:22,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:20:22,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:22,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:20:22,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:20:22,202 INFO L87 Difference]: Start difference. First operand 138281 states and 509043 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:24,115 INFO L93 Difference]: Finished difference Result 138841 states and 510581 transitions. [2021-05-22 02:20:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:20:24,116 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:20:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:24,865 INFO L225 Difference]: With dead ends: 138841 [2021-05-22 02:20:24,865 INFO L226 Difference]: Without dead ends: 138765 [2021-05-22 02:20:24,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:20:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138765 states. [2021-05-22 02:20:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138765 to 138390. [2021-05-22 02:20:27,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138390 states, 138389 states have (on average 3.6810729176451886) internal successors, (509420), 138389 states have internal predecessors, (509420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138390 states to 138390 states and 509420 transitions. [2021-05-22 02:20:28,279 INFO L78 Accepts]: Start accepts. Automaton has 138390 states and 509420 transitions. Word has length 33 [2021-05-22 02:20:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:28,280 INFO L482 AbstractCegarLoop]: Abstraction has 138390 states and 509420 transitions. [2021-05-22 02:20:28,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 138390 states and 509420 transitions. [2021-05-22 02:20:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:20:28,561 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:28,561 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:28,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-05-22 02:20:28,762 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:28,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1744422478, now seen corresponding path program 186 times [2021-05-22 02:20:28,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:28,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260669246] [2021-05-22 02:20:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:28,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:28,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260669246] [2021-05-22 02:20:28,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260669246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:28,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741190813] [2021-05-22 02:20:28,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:28,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-22 02:20:28,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:28,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:29,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741190813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:29,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:29,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-22 02:20:29,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648041431] [2021-05-22 02:20:29,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:20:29,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:29,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:20:29,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:20:29,125 INFO L87 Difference]: Start difference. First operand 138390 states and 509420 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:30,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:30,771 INFO L93 Difference]: Finished difference Result 139561 states and 512775 transitions. [2021-05-22 02:20:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:20:30,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:20:30,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:31,210 INFO L225 Difference]: With dead ends: 139561 [2021-05-22 02:20:31,210 INFO L226 Difference]: Without dead ends: 139512 [2021-05-22 02:20:31,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:20:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139512 states. [2021-05-22 02:20:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139512 to 138609. [2021-05-22 02:20:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138609 states, 138608 states have (on average 3.681490245873254) internal successors, (510284), 138608 states have internal predecessors, (510284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138609 states to 138609 states and 510284 transitions. [2021-05-22 02:20:35,126 INFO L78 Accepts]: Start accepts. Automaton has 138609 states and 510284 transitions. Word has length 33 [2021-05-22 02:20:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:35,126 INFO L482 AbstractCegarLoop]: Abstraction has 138609 states and 510284 transitions. [2021-05-22 02:20:35,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:35,126 INFO L276 IsEmpty]: Start isEmpty. Operand 138609 states and 510284 transitions. [2021-05-22 02:20:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:20:35,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:35,544 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:35,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:35,745 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1200847454, now seen corresponding path program 187 times [2021-05-22 02:20:35,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:35,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022227664] [2021-05-22 02:20:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:35,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:35,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022227664] [2021-05-22 02:20:35,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022227664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:35,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269371534] [2021-05-22 02:20:35,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:35,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:35,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:36,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269371534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:36,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:36,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-22 02:20:36,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705847219] [2021-05-22 02:20:36,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:20:36,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:20:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:20:36,088 INFO L87 Difference]: Start difference. First operand 138609 states and 510284 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:37,835 INFO L93 Difference]: Finished difference Result 139165 states and 511834 transitions. [2021-05-22 02:20:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:20:37,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:20:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:38,278 INFO L225 Difference]: With dead ends: 139165 [2021-05-22 02:20:38,278 INFO L226 Difference]: Without dead ends: 139021 [2021-05-22 02:20:38,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:20:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139021 states. Received shutdown request... [2021-05-22 02:20:39,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:39,003 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 02:20:39,004 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2021-05-22 02:20:39,005 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-22 02:20:39,006 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:20:39,006 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:20:39,006 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:20:39,006 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:20:39,006 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:20:39,006 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:20:39,006 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:20:39,006 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 02:20:39,007 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-05-22 02:20:39,007 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 02:20:39,007 INFO L315 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (2/2) [2021-05-22 02:20:39,007 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 02:20:39,009 WARN L196 ceAbstractionStarter]: Timeout [2021-05-22 02:20:39,010 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 02:20:39 BasicIcfg [2021-05-22 02:20:39,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 02:20:39,010 INFO L168 Benchmark]: Toolchain (without parser) took 668903.44 ms. Allocated memory was 343.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 323.2 MB in the beginning and 12.5 GB in the end (delta: -12.1 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. [2021-05-22 02:20:39,011 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 343.9 MB. Free memory was 324.4 MB in the beginning and 324.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:20:39,011 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.49 ms. Allocated memory is still 343.9 MB. Free memory was 323.2 MB in the beginning and 321.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:20:39,011 INFO L168 Benchmark]: Boogie Preprocessor took 15.45 ms. Allocated memory is still 343.9 MB. Free memory was 321.7 MB in the beginning and 320.7 MB in the end (delta: 986.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:20:39,011 INFO L168 Benchmark]: RCFGBuilder took 304.60 ms. Allocated memory is still 343.9 MB. Free memory was 320.6 MB in the beginning and 308.2 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:20:39,011 INFO L168 Benchmark]: TraceAbstraction took 668551.89 ms. Allocated memory was 343.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 307.7 MB in the beginning and 12.5 GB in the end (delta: -12.2 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. [2021-05-22 02:20:39,015 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 343.9 MB. Free memory was 324.4 MB in the beginning and 324.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.49 ms. Allocated memory is still 343.9 MB. Free memory was 323.2 MB in the beginning and 321.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.45 ms. Allocated memory is still 343.9 MB. Free memory was 321.7 MB in the beginning and 320.7 MB in the end (delta: 986.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 304.60 ms. Allocated memory is still 343.9 MB. Free memory was 320.6 MB in the beginning and 308.2 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 668551.89 ms. Allocated memory was 343.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 307.7 MB in the beginning and 12.5 GB in the end (delta: -12.2 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 668437.4ms, OverallIterations: 196, TraceHistogramMax: 3, EmptinessCheckTime: 38105.1ms, AutomataDifference: 212277.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11460 SDtfs, 23967 SDslu, 115944 SDs, 0 SdLazy, 79096 SolverSat, 3852 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34982.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8460 GetRequests, 4218 SyntacticMatches, 44 SemanticMatches, 4198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33000 ImplicationChecksByTransitivity, 53233.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=138609occurred in iteration=195, InterpolantAutomatonStates: 3445, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 322798.1ms AutomataMinimizationTime, 196 MinimizatonAttempts, 692721 StatesRemovedByMinimization, 195 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 783.7ms SsaConstructionTime, 2124.1ms SatisfiabilityAnalysisTime, 48818.1ms InterpolantComputationTime, 11027 NumberOfCodeBlocks, 11011 NumberOfCodeBlocksAsserted, 728 NumberOfCheckSat, 10642 ConstructedInterpolants, 0 QuantifiedInterpolants, 141357 SizeOfPredicates, 789 NumberOfNonLiveVariables, 15204 ConjunctsInSsa, 3341 ConjunctsInUnsatCore, 385 InterpolantComputations, 7 PerfectInterpolantSequences, 808/6542 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 1.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown