/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/popl20/threaded-sum-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:48:19,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:48:19,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:48:19,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 15:48:19,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 15:48:19,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 15:48:19,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 15:48:19,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 15:48:19,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 15:48:19,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 15:48:19,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 15:48:19,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 15:48:19,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 15:48:19,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 15:48:19,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 15:48:19,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 15:48:19,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 15:48:19,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 15:48:19,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 15:48:19,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 15:48:19,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 15:48:19,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 15:48:19,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 15:48:19,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 15:48:19,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 15:48:19,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 15:48:19,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 15:48:19,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 15:48:19,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 15:48:19,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 15:48:19,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 15:48:19,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 15:48:19,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 15:48:19,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 15:48:19,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 15:48:19,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 15:48:19,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 15:48:19,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 15:48:19,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:48:19,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:48:19,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:48:19,153 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 [2021-06-05 15:48:19,176 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:48:19,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:48:19,177 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:48:19,177 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:48:19,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:48:19,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:48:19,179 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:48:19,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:48:19,179 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:48:19,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:48:19,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:48:19,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:48:19,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:48:19,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:48:19,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:48:19,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:48:19,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:48:19,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:48:19,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:48:19,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:48:19,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:48:19,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:48:19,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:48:19,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:48:19,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:48:19,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:48:19,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:48:19,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:48:19,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:48:19,181 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:48:19,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:48:19,181 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:48:19,181 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:48:19,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:48:19,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:48:19,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:48:19,398 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:48:19,398 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:48:19,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl [2021-06-05 15:48:19,399 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl' [2021-06-05 15:48:19,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:48:19,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:48:19,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:48:19,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:48:19,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:48:19,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:19" (1/1) ... [2021-06-05 15:48:19,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:19" (1/1) ... [2021-06-05 15:48:19,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:48:19,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:48:19,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:48:19,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:48:19,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:19" (1/1) ... [2021-06-05 15:48:19,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:19" (1/1) ... [2021-06-05 15:48:19,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:19" (1/1) ... [2021-06-05 15:48:19,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:19" (1/1) ... [2021-06-05 15:48:19,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:19" (1/1) ... [2021-06-05 15:48:19,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:19" (1/1) ... [2021-06-05 15:48:19,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:19" (1/1) ... [2021-06-05 15:48:19,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:48:19,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:48:19,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:48:19,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:48:19,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:19" (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 [2021-06-05 15:48:19,525 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:48:19,525 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:48:19,525 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:48:19,525 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:48:19,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:48:19,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:48:19,526 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:48:19,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:48:19,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:48:19,526 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:48:19,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:48:19,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:48:19,528 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:48:19,691 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:48:19,692 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:48:19,693 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:48:19 BoogieIcfgContainer [2021-06-05 15:48:19,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:48:19,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:48:19,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:48:19,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:48:19,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:19" (1/2) ... [2021-06-05 15:48:19,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6045ce7a and model type threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:48:19, skipping insertion in model container [2021-06-05 15:48:19,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:48:19" (2/2) ... [2021-06-05 15:48:19,698 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3.wvr.bpl [2021-06-05 15:48:19,702 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:48:19,702 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:48:19,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:48:19,703 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:48:19,743 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 15:48:19,756 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 15:48:19,768 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:48:19,769 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:48:19,769 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:48:19,769 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:48:19,769 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:48:19,769 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:48:19,769 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:48:19,769 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:48:19,775 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-06-05 15:48:19,792 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:48:19,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:19,801 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] [2021-06-05 15:48:19,802 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:19,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1198606410, now seen corresponding path program 1 times [2021-06-05 15:48:19,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:19,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820395125] [2021-06-05 15:48:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:19,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:19,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820395125] [2021-06-05 15:48:19,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820395125] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:48:19,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:48:19,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:48:19,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503291802] [2021-06-05 15:48:19,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:48:19,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:19,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:48:19,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:48:19,990 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:20,043 INFO L93 Difference]: Finished difference Result 186 states and 525 transitions. [2021-06-05 15:48:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:48:20,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-06-05 15:48:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:20,058 INFO L225 Difference]: With dead ends: 186 [2021-06-05 15:48:20,058 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 15:48:20,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:48:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 15:48:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-06-05 15:48:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.81875) internal successors, (451), 160 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 451 transitions. [2021-06-05 15:48:20,114 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 451 transitions. Word has length 21 [2021-06-05 15:48:20,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:20,114 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 451 transitions. [2021-06-05 15:48:20,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 451 transitions. [2021-06-05 15:48:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:48:20,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:20,116 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, 1, 1] [2021-06-05 15:48:20,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:48:20,119 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:20,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:20,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2114235914, now seen corresponding path program 1 times [2021-06-05 15:48:20,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:20,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51135976] [2021-06-05 15:48:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:20,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:20,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51135976] [2021-06-05 15:48:20,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51135976] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:48:20,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:48:20,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:48:20,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042151197] [2021-06-05 15:48:20,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:48:20,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:20,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:48:20,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:48:20,169 INFO L87 Difference]: Start difference. First operand 161 states and 451 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:20,194 INFO L93 Difference]: Finished difference Result 151 states and 403 transitions. [2021-06-05 15:48:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:48:20,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-06-05 15:48:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:20,196 INFO L225 Difference]: With dead ends: 151 [2021-06-05 15:48:20,196 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 15:48:20,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:48:20,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 15:48:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-06-05 15:48:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.6866666666666665) internal successors, (403), 150 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-06-05 15:48:20,203 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 23 [2021-06-05 15:48:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:20,203 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-06-05 15:48:20,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-06-05 15:48:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:48:20,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:20,204 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, 1, 1, 1, 1, 1] [2021-06-05 15:48:20,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:48:20,205 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:20,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:20,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1683683079, now seen corresponding path program 1 times [2021-06-05 15:48:20,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:20,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853668565] [2021-06-05 15:48:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:20,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:20,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853668565] [2021-06-05 15:48:20,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853668565] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:48:20,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:48:20,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:48:20,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375196809] [2021-06-05 15:48:20,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:48:20,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:20,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:48:20,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:48:20,238 INFO L87 Difference]: Start difference. First operand 151 states and 403 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:20,304 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-06-05 15:48:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:48:20,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-06-05 15:48:20,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:20,305 INFO L225 Difference]: With dead ends: 223 [2021-06-05 15:48:20,306 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 15:48:20,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:48:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 15:48:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-06-05 15:48:20,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7882882882882885) internal successors, (619), 222 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-06-05 15:48:20,315 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-06-05 15:48:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:20,315 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-06-05 15:48:20,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-06-05 15:48:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:48:20,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:20,317 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:20,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:48:20,317 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:20,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:20,318 INFO L82 PathProgramCache]: Analyzing trace with hash 71290013, now seen corresponding path program 1 times [2021-06-05 15:48:20,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:20,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532336469] [2021-06-05 15:48:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:48:20,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:20,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532336469] [2021-06-05 15:48:20,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532336469] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:48:20,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:48:20,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:48:20,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948603032] [2021-06-05 15:48:20,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:48:20,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:20,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:48:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:48:20,363 INFO L87 Difference]: Start difference. First operand 223 states and 619 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2021-06-05 15:48:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:20,406 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-06-05 15:48:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:48:20,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 28 [2021-06-05 15:48:20,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:20,409 INFO L225 Difference]: With dead ends: 344 [2021-06-05 15:48:20,409 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 15:48:20,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:48:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 15:48:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-06-05 15:48:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8076923076923075) internal successors, (657), 234 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-06-05 15:48:20,432 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-06-05 15:48:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:20,433 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-06-05 15:48:20,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2021-06-05 15:48:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-06-05 15:48:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:48:20,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:20,434 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:20,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:48:20,435 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:20,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1179461309, now seen corresponding path program 2 times [2021-06-05 15:48:20,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:20,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080199409] [2021-06-05 15:48:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:48:20,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:20,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080199409] [2021-06-05 15:48:20,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080199409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:20,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159024673] [2021-06-05 15:48:20,559 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 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 [2021-06-05 15:48:20,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:48:20,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:20,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:48:20,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:48:20,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159024673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:20,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:20,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 15:48:20,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940982011] [2021-06-05 15:48:20,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:48:20,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:20,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:48:20,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:48:20,884 INFO L87 Difference]: Start difference. First operand 235 states and 657 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 15:48:21,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:21,429 INFO L93 Difference]: Finished difference Result 545 states and 1518 transitions. [2021-06-05 15:48:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:48:21,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 30 [2021-06-05 15:48:21,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:21,432 INFO L225 Difference]: With dead ends: 545 [2021-06-05 15:48:21,432 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 15:48:21,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:48:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 15:48:21,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 312. [2021-06-05 15:48:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9485530546623795) internal successors, (917), 311 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-06-05 15:48:21,444 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 30 [2021-06-05 15:48:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:21,445 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-06-05 15:48:21,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 15:48:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-06-05 15:48:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:48:21,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:21,451 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:21,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:21,670 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:21,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1066258745, now seen corresponding path program 3 times [2021-06-05 15:48:21,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:21,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267481371] [2021-06-05 15:48:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:21,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:21,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267481371] [2021-06-05 15:48:21,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267481371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:21,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158684785] [2021-06-05 15:48:21,746 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 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 [2021-06-05 15:48:21,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:48:21,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:21,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:48:21,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:21,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158684785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:21,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:21,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 15:48:21,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433892198] [2021-06-05 15:48:21,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:48:21,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:21,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:48:21,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:48:21,989 INFO L87 Difference]: Start difference. First operand 312 states and 917 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 15:48:22,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:22,623 INFO L93 Difference]: Finished difference Result 874 states and 2542 transitions. [2021-06-05 15:48:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:48:22,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 30 [2021-06-05 15:48:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:22,631 INFO L225 Difference]: With dead ends: 874 [2021-06-05 15:48:22,631 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 15:48:22,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 510.7ms TimeCoverageRelationStatistics Valid=387, Invalid=1019, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:48:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 15:48:22,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 392. [2021-06-05 15:48:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0051150895140664) internal successors, (1175), 391 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1175 transitions. [2021-06-05 15:48:22,652 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1175 transitions. Word has length 30 [2021-06-05 15:48:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:22,653 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1175 transitions. [2021-06-05 15:48:22,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 15:48:22,653 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1175 transitions. [2021-06-05 15:48:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:48:22,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:22,655 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:22,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:48:22,871 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:22,871 INFO L82 PathProgramCache]: Analyzing trace with hash -887660733, now seen corresponding path program 4 times [2021-06-05 15:48:22,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:22,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537501155] [2021-06-05 15:48:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:48:22,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:22,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537501155] [2021-06-05 15:48:22,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537501155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:22,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935719958] [2021-06-05 15:48:22,966 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 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 [2021-06-05 15:48:22,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:48:22,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:23,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:48:23,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:48:23,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935719958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:23,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:23,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:48:23,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908851182] [2021-06-05 15:48:23,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:48:23,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:23,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:48:23,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:48:23,051 INFO L87 Difference]: Start difference. First operand 392 states and 1175 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:23,204 INFO L93 Difference]: Finished difference Result 800 states and 2390 transitions. [2021-06-05 15:48:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:48:23,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-06-05 15:48:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:23,208 INFO L225 Difference]: With dead ends: 800 [2021-06-05 15:48:23,208 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 15:48:23,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:48:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 15:48:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 521. [2021-06-05 15:48:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.1134615384615385) internal successors, (1619), 520 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1619 transitions. [2021-06-05 15:48:23,222 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1619 transitions. Word has length 30 [2021-06-05 15:48:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:23,222 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1619 transitions. [2021-06-05 15:48:23,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1619 transitions. [2021-06-05 15:48:23,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:48:23,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:23,224 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:23,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:48:23,441 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:23,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:23,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1202859447, now seen corresponding path program 5 times [2021-06-05 15:48:23,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:23,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479525449] [2021-06-05 15:48:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:23,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:23,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479525449] [2021-06-05 15:48:23,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479525449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:23,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634330188] [2021-06-05 15:48:23,528 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 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 [2021-06-05 15:48:23,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:48:23,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:23,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:48:23,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:23,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634330188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:23,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:23,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 15:48:23,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078535989] [2021-06-05 15:48:23,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:48:23,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:23,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:48:23,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:48:23,721 INFO L87 Difference]: Start difference. First operand 521 states and 1619 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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) [2021-06-05 15:48:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:24,420 INFO L93 Difference]: Finished difference Result 2062 states and 6284 transitions. [2021-06-05 15:48:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:48:24,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 30 [2021-06-05 15:48:24,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:24,428 INFO L225 Difference]: With dead ends: 2062 [2021-06-05 15:48:24,429 INFO L226 Difference]: Without dead ends: 2062 [2021-06-05 15:48:24,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 543.6ms TimeCoverageRelationStatistics Valid=593, Invalid=1569, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:48:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-06-05 15:48:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1269. [2021-06-05 15:48:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.1553627760252367) internal successors, (4001), 1268 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4001 transitions. [2021-06-05 15:48:24,462 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4001 transitions. Word has length 30 [2021-06-05 15:48:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:24,462 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4001 transitions. [2021-06-05 15:48:24,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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) [2021-06-05 15:48:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4001 transitions. [2021-06-05 15:48:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:48:24,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:24,465 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:24,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:24,681 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:24,682 INFO L82 PathProgramCache]: Analyzing trace with hash -180076409, now seen corresponding path program 6 times [2021-06-05 15:48:24,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:24,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332045063] [2021-06-05 15:48:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:24,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:24,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332045063] [2021-06-05 15:48:24,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332045063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:24,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361873214] [2021-06-05 15:48:24,742 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 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 [2021-06-05 15:48:24,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:48:24,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:24,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:48:24,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:24,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361873214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:24,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:24,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:48:24,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481856340] [2021-06-05 15:48:24,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:48:24,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:24,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:48:24,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:48:24,859 INFO L87 Difference]: Start difference. First operand 1269 states and 4001 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:24,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:24,990 INFO L93 Difference]: Finished difference Result 1797 states and 5545 transitions. [2021-06-05 15:48:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:48:24,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-06-05 15:48:24,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:24,997 INFO L225 Difference]: With dead ends: 1797 [2021-06-05 15:48:24,997 INFO L226 Difference]: Without dead ends: 1797 [2021-06-05 15:48:24,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:48:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-06-05 15:48:25,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1209. [2021-06-05 15:48:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 3.138245033112583) internal successors, (3791), 1208 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:25,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3791 transitions. [2021-06-05 15:48:25,026 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3791 transitions. Word has length 30 [2021-06-05 15:48:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:25,026 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 3791 transitions. [2021-06-05 15:48:25,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3791 transitions. [2021-06-05 15:48:25,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:48:25,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:25,028 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:25,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:48:25,245 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:25,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:25,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1004171587, now seen corresponding path program 7 times [2021-06-05 15:48:25,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:25,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379799537] [2021-06-05 15:48:25,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:25,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:25,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379799537] [2021-06-05 15:48:25,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379799537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:25,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422164100] [2021-06-05 15:48:25,292 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 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 [2021-06-05 15:48:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:25,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:48:25,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:25,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422164100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:25,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:25,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:48:25,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787387295] [2021-06-05 15:48:25,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:48:25,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:25,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:48:25,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:48:25,382 INFO L87 Difference]: Start difference. First operand 1209 states and 3791 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:25,494 INFO L93 Difference]: Finished difference Result 2345 states and 7301 transitions. [2021-06-05 15:48:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:48:25,495 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-06-05 15:48:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:25,503 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 15:48:25,503 INFO L226 Difference]: Without dead ends: 2345 [2021-06-05 15:48:25,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:48:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-06-05 15:48:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1749. [2021-06-05 15:48:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.230549199084668) internal successors, (5647), 1748 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5647 transitions. [2021-06-05 15:48:25,541 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5647 transitions. Word has length 30 [2021-06-05 15:48:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:25,541 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 5647 transitions. [2021-06-05 15:48:25,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5647 transitions. [2021-06-05 15:48:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:48:25,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:25,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:25,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:25,765 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash 612200489, now seen corresponding path program 8 times [2021-06-05 15:48:25,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:25,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094596191] [2021-06-05 15:48:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:48:25,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:25,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094596191] [2021-06-05 15:48:25,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094596191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:25,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85443626] [2021-06-05 15:48:25,824 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 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 [2021-06-05 15:48:25,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:48:25,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:25,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:48:25,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:48:26,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85443626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:26,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:26,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 15:48:26,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130091071] [2021-06-05 15:48:26,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:48:26,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:26,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:48:26,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:48:26,042 INFO L87 Difference]: Start difference. First operand 1749 states and 5647 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-06-05 15:48:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:26,414 INFO L93 Difference]: Finished difference Result 2383 states and 7508 transitions. [2021-06-05 15:48:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:48:26,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 32 [2021-06-05 15:48:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:26,424 INFO L225 Difference]: With dead ends: 2383 [2021-06-05 15:48:26,424 INFO L226 Difference]: Without dead ends: 2383 [2021-06-05 15:48:26,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:48:26,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-05 15:48:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1915. [2021-06-05 15:48:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 3.239811912225705) internal successors, (6201), 1914 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 6201 transitions. [2021-06-05 15:48:26,471 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 6201 transitions. Word has length 32 [2021-06-05 15:48:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:26,471 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 6201 transitions. [2021-06-05 15:48:26,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-06-05 15:48:26,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 6201 transitions. [2021-06-05 15:48:26,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:48:26,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:26,476 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:26,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:26,694 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash 533920293, now seen corresponding path program 9 times [2021-06-05 15:48:26,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:26,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618513730] [2021-06-05 15:48:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:48:26,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:26,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618513730] [2021-06-05 15:48:26,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618513730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:26,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603739773] [2021-06-05 15:48:26,744 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 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 [2021-06-05 15:48:26,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:48:26,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:26,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:48:26,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:26,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603739773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:26,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:26,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:48:26,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020272096] [2021-06-05 15:48:26,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:48:26,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:26,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:48:26,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:48:26,902 INFO L87 Difference]: Start difference. First operand 1915 states and 6201 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2021-06-05 15:48:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:27,478 INFO L93 Difference]: Finished difference Result 3613 states and 11319 transitions. [2021-06-05 15:48:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:48:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 32 [2021-06-05 15:48:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:27,493 INFO L225 Difference]: With dead ends: 3613 [2021-06-05 15:48:27,493 INFO L226 Difference]: Without dead ends: 3613 [2021-06-05 15:48:27,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:48:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2021-06-05 15:48:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 2052. [2021-06-05 15:48:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.2457337883959045) internal successors, (6657), 2051 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6657 transitions. [2021-06-05 15:48:27,551 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6657 transitions. Word has length 32 [2021-06-05 15:48:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:27,551 INFO L482 AbstractCegarLoop]: Abstraction has 2052 states and 6657 transitions. [2021-06-05 15:48:27,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2021-06-05 15:48:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6657 transitions. [2021-06-05 15:48:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:48:27,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:27,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:27,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 15:48:27,774 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:27,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:27,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1903600235, now seen corresponding path program 10 times [2021-06-05 15:48:27,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:27,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369399488] [2021-06-05 15:48:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:27,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:27,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369399488] [2021-06-05 15:48:27,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369399488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:27,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643497150] [2021-06-05 15:48:27,858 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 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 [2021-06-05 15:48:27,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:48:27,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:27,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:48:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:28,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643497150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:28,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:28,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 15:48:28,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360980225] [2021-06-05 15:48:28,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:48:28,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:28,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:48:28,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:48:28,003 INFO L87 Difference]: Start difference. First operand 2052 states and 6657 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 15:48:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:28,333 INFO L93 Difference]: Finished difference Result 4372 states and 13767 transitions. [2021-06-05 15:48:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:48:28,334 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 32 [2021-06-05 15:48:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:28,351 INFO L225 Difference]: With dead ends: 4372 [2021-06-05 15:48:28,351 INFO L226 Difference]: Without dead ends: 4372 [2021-06-05 15:48:28,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:48:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4372 states. [2021-06-05 15:48:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4372 to 3140. [2021-06-05 15:48:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 3.294361261548264) internal successors, (10341), 3139 states have internal predecessors, (10341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 10341 transitions. [2021-06-05 15:48:28,430 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 10341 transitions. Word has length 32 [2021-06-05 15:48:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:28,431 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 10341 transitions. [2021-06-05 15:48:28,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 15:48:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 10341 transitions. [2021-06-05 15:48:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:48:28,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:28,437 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:28,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:28,654 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:28,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2089630951, now seen corresponding path program 11 times [2021-06-05 15:48:28,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:28,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113568984] [2021-06-05 15:48:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:28,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:28,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113568984] [2021-06-05 15:48:28,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113568984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:28,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708389438] [2021-06-05 15:48:28,764 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 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 [2021-06-05 15:48:28,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:48:28,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:28,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:48:28,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:28,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708389438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:28,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:28,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 15:48:28,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976724710] [2021-06-05 15:48:28,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:48:28,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:28,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:48:28,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:48:28,954 INFO L87 Difference]: Start difference. First operand 3140 states and 10341 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:30,380 INFO L93 Difference]: Finished difference Result 9020 states and 28737 transitions. [2021-06-05 15:48:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:48:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 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 32 [2021-06-05 15:48:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:30,399 INFO L225 Difference]: With dead ends: 9020 [2021-06-05 15:48:30,399 INFO L226 Difference]: Without dead ends: 9020 [2021-06-05 15:48:30,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 1082.6ms TimeCoverageRelationStatistics Valid=1159, Invalid=3397, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:48:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9020 states. [2021-06-05 15:48:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9020 to 5832. [2021-06-05 15:48:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5832 states, 5831 states have (on average 3.3656319670725434) internal successors, (19625), 5831 states have internal predecessors, (19625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5832 states to 5832 states and 19625 transitions. [2021-06-05 15:48:30,575 INFO L78 Accepts]: Start accepts. Automaton has 5832 states and 19625 transitions. Word has length 32 [2021-06-05 15:48:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:30,575 INFO L482 AbstractCegarLoop]: Abstraction has 5832 states and 19625 transitions. [2021-06-05 15:48:30,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5832 states and 19625 transitions. [2021-06-05 15:48:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:48:30,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:30,588 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:30,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:30,803 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:30,804 INFO L82 PathProgramCache]: Analyzing trace with hash -379569387, now seen corresponding path program 12 times [2021-06-05 15:48:30,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:30,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214275461] [2021-06-05 15:48:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:30,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:30,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214275461] [2021-06-05 15:48:30,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214275461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:30,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511931802] [2021-06-05 15:48:30,887 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 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 [2021-06-05 15:48:30,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:48:30,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:48:30,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:30,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511931802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:30,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:30,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-06-05 15:48:30,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808495932] [2021-06-05 15:48:30,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:48:30,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:48:30,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:48:30,995 INFO L87 Difference]: Start difference. First operand 5832 states and 19625 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 15:48:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:31,948 INFO L93 Difference]: Finished difference Result 12646 states and 40893 transitions. [2021-06-05 15:48:31,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:48:31,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 32 [2021-06-05 15:48:31,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:31,976 INFO L225 Difference]: With dead ends: 12646 [2021-06-05 15:48:31,976 INFO L226 Difference]: Without dead ends: 12646 [2021-06-05 15:48:31,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 678.4ms TimeCoverageRelationStatistics Valid=883, Invalid=2087, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:48:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12646 states. [2021-06-05 15:48:32,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12646 to 6547. [2021-06-05 15:48:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 6546 states have (on average 3.340360525511763) internal successors, (21866), 6546 states have internal predecessors, (21866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 21866 transitions. [2021-06-05 15:48:32,147 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 21866 transitions. Word has length 32 [2021-06-05 15:48:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:32,147 INFO L482 AbstractCegarLoop]: Abstraction has 6547 states and 21866 transitions. [2021-06-05 15:48:32,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 15:48:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 21866 transitions. [2021-06-05 15:48:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:48:32,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:32,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:32,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:48:32,369 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:32,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:32,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2122812367, now seen corresponding path program 13 times [2021-06-05 15:48:32,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:32,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632580850] [2021-06-05 15:48:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:48:32,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:32,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632580850] [2021-06-05 15:48:32,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632580850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:32,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259903641] [2021-06-05 15:48:32,421 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 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 [2021-06-05 15:48:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:48:32,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:48:32,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259903641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:32,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:32,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 15:48:32,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528234395] [2021-06-05 15:48:32,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:48:32,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:32,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:48:32,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:48:32,495 INFO L87 Difference]: Start difference. First operand 6547 states and 21866 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-06-05 15:48:32,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:32,591 INFO L93 Difference]: Finished difference Result 8397 states and 27709 transitions. [2021-06-05 15:48:32,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:48:32,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 32 [2021-06-05 15:48:32,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:32,607 INFO L225 Difference]: With dead ends: 8397 [2021-06-05 15:48:32,607 INFO L226 Difference]: Without dead ends: 8397 [2021-06-05 15:48:32,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:48:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8397 states. [2021-06-05 15:48:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8397 to 6574. [2021-06-05 15:48:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6574 states, 6573 states have (on average 3.3476342613722805) internal successors, (22004), 6573 states have internal predecessors, (22004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 22004 transitions. [2021-06-05 15:48:32,785 INFO L78 Accepts]: Start accepts. Automaton has 6574 states and 22004 transitions. Word has length 32 [2021-06-05 15:48:32,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:32,785 INFO L482 AbstractCegarLoop]: Abstraction has 6574 states and 22004 transitions. [2021-06-05 15:48:32,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-06-05 15:48:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 6574 states and 22004 transitions. [2021-06-05 15:48:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:48:32,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:32,793 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:32,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 15:48:32,999 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:33,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:33,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1254099961, now seen corresponding path program 14 times [2021-06-05 15:48:33,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:33,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850726092] [2021-06-05 15:48:33,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:48:33,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:33,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850726092] [2021-06-05 15:48:33,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850726092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:33,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070320541] [2021-06-05 15:48:33,249 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 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 [2021-06-05 15:48:33,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:48:33,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:33,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:48:33,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:33,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070320541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:33,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:33,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 15:48:33,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052441282] [2021-06-05 15:48:33,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:48:33,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:33,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:48:33,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:48:33,877 INFO L87 Difference]: Start difference. First operand 6574 states and 22004 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:35,749 INFO L93 Difference]: Finished difference Result 8244 states and 26601 transitions. [2021-06-05 15:48:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:48:35,750 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:48:35,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:35,766 INFO L225 Difference]: With dead ends: 8244 [2021-06-05 15:48:35,766 INFO L226 Difference]: Without dead ends: 8170 [2021-06-05 15:48:35,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1411.1ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:48:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8170 states. [2021-06-05 15:48:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8170 to 6796. [2021-06-05 15:48:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 6795 states have (on average 3.33495217071376) internal successors, (22661), 6795 states have internal predecessors, (22661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 22661 transitions. [2021-06-05 15:48:35,900 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 22661 transitions. Word has length 34 [2021-06-05 15:48:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:35,900 INFO L482 AbstractCegarLoop]: Abstraction has 6796 states and 22661 transitions. [2021-06-05 15:48:35,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 22661 transitions. [2021-06-05 15:48:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:48:35,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:35,909 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:36,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:48:36,125 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash -695063545, now seen corresponding path program 15 times [2021-06-05 15:48:36,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:36,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123204814] [2021-06-05 15:48:36,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:36,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:36,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123204814] [2021-06-05 15:48:36,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123204814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:36,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549922353] [2021-06-05 15:48:36,406 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 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 [2021-06-05 15:48:36,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:48:36,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:36,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:48:36,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:37,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549922353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:37,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:37,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-06-05 15:48:37,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785988873] [2021-06-05 15:48:37,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:48:37,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:37,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:48:37,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:48:37,044 INFO L87 Difference]: Start difference. First operand 6796 states and 22661 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:40,573 INFO L93 Difference]: Finished difference Result 12070 states and 38381 transitions. [2021-06-05 15:48:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 15:48:40,574 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:48:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:40,597 INFO L225 Difference]: With dead ends: 12070 [2021-06-05 15:48:40,597 INFO L226 Difference]: Without dead ends: 11996 [2021-06-05 15:48:40,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 2803.1ms TimeCoverageRelationStatistics Valid=1280, Invalid=6376, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 15:48:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-06-05 15:48:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 7004. [2021-06-05 15:48:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 7003 states have (on average 3.3399971440811083) internal successors, (23390), 7003 states have internal predecessors, (23390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 23390 transitions. [2021-06-05 15:48:40,763 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 23390 transitions. Word has length 34 [2021-06-05 15:48:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:40,763 INFO L482 AbstractCegarLoop]: Abstraction has 7004 states and 23390 transitions. [2021-06-05 15:48:40,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 23390 transitions. [2021-06-05 15:48:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:48:40,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:40,772 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:40,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:40,985 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:40,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1711109379, now seen corresponding path program 16 times [2021-06-05 15:48:40,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:40,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105022222] [2021-06-05 15:48:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:41,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:41,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105022222] [2021-06-05 15:48:41,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105022222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:41,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162906483] [2021-06-05 15:48:41,197 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 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 [2021-06-05 15:48:41,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:48:41,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:41,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:48:41,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:41,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162906483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:41,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:41,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:48:41,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059061869] [2021-06-05 15:48:41,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:48:41,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:41,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:48:41,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:48:41,907 INFO L87 Difference]: Start difference. First operand 7004 states and 23390 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:44,038 INFO L93 Difference]: Finished difference Result 13107 states and 41620 transitions. [2021-06-05 15:48:44,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:48:44,038 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:48:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:44,057 INFO L225 Difference]: With dead ends: 13107 [2021-06-05 15:48:44,057 INFO L226 Difference]: Without dead ends: 13046 [2021-06-05 15:48:44,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1976.3ms TimeCoverageRelationStatistics Valid=901, Invalid=3929, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:48:44,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13046 states. [2021-06-05 15:48:44,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13046 to 7052. [2021-06-05 15:48:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 3.3450574386611827) internal successors, (23586), 7051 states have internal predecessors, (23586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 23586 transitions. [2021-06-05 15:48:44,217 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 23586 transitions. Word has length 34 [2021-06-05 15:48:44,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:44,217 INFO L482 AbstractCegarLoop]: Abstraction has 7052 states and 23586 transitions. [2021-06-05 15:48:44,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 23586 transitions. [2021-06-05 15:48:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:48:44,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:44,227 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:44,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:44,445 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:44,445 INFO L82 PathProgramCache]: Analyzing trace with hash -316136445, now seen corresponding path program 17 times [2021-06-05 15:48:44,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:44,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004883638] [2021-06-05 15:48:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:44,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:44,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004883638] [2021-06-05 15:48:44,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004883638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:44,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92436984] [2021-06-05 15:48:44,671 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 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 [2021-06-05 15:48:44,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:48:44,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:44,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:48:44,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:45,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92436984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:45,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:45,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:48:45,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939726235] [2021-06-05 15:48:45,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:48:45,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:45,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:48:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:48:45,289 INFO L87 Difference]: Start difference. First operand 7052 states and 23586 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:48,667 INFO L93 Difference]: Finished difference Result 15153 states and 48281 transitions. [2021-06-05 15:48:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 15:48:48,667 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:48:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:48,688 INFO L225 Difference]: With dead ends: 15153 [2021-06-05 15:48:48,688 INFO L226 Difference]: Without dead ends: 15073 [2021-06-05 15:48:48,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 2694.6ms TimeCoverageRelationStatistics Valid=1274, Invalid=6558, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 15:48:48,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15073 states. [2021-06-05 15:48:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15073 to 7120. [2021-06-05 15:48:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.345975558364939) internal successors, (23820), 7119 states have internal predecessors, (23820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 23820 transitions. [2021-06-05 15:48:48,839 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 23820 transitions. Word has length 34 [2021-06-05 15:48:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:48,839 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 23820 transitions. [2021-06-05 15:48:48,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:48,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 23820 transitions. [2021-06-05 15:48:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:48:48,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:48,849 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:49,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:49,065 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:49,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:49,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1006112687, now seen corresponding path program 18 times [2021-06-05 15:48:49,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:49,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970099260] [2021-06-05 15:48:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:49,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:49,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970099260] [2021-06-05 15:48:49,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970099260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:49,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693230349] [2021-06-05 15:48:49,318 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 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 [2021-06-05 15:48:49,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:48:49,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:48:49,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:49,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693230349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:49,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:49,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-06-05 15:48:49,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961927950] [2021-06-05 15:48:49,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:48:49,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:48:49,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:48:49,903 INFO L87 Difference]: Start difference. First operand 7120 states and 23820 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:51,674 INFO L93 Difference]: Finished difference Result 10976 states and 35019 transitions. [2021-06-05 15:48:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:48:51,674 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:48:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:51,689 INFO L225 Difference]: With dead ends: 10976 [2021-06-05 15:48:51,689 INFO L226 Difference]: Without dead ends: 10902 [2021-06-05 15:48:51,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1412.0ms TimeCoverageRelationStatistics Valid=436, Invalid=2756, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:48:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10902 states. [2021-06-05 15:48:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10902 to 7382. [2021-06-05 15:48:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 7381 states have (on average 3.341959084134941) internal successors, (24667), 7381 states have internal predecessors, (24667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 24667 transitions. [2021-06-05 15:48:51,834 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 24667 transitions. Word has length 34 [2021-06-05 15:48:51,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:51,834 INFO L482 AbstractCegarLoop]: Abstraction has 7382 states and 24667 transitions. [2021-06-05 15:48:51,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 24667 transitions. [2021-06-05 15:48:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:48:51,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:51,845 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:52,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:52,062 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:52,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1609354065, now seen corresponding path program 19 times [2021-06-05 15:48:52,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:52,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673835939] [2021-06-05 15:48:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:52,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:52,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673835939] [2021-06-05 15:48:52,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673835939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:52,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776953174] [2021-06-05 15:48:52,345 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 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 [2021-06-05 15:48:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:52,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:48:52,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:53,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776953174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:53,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:53,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:48:53,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009107006] [2021-06-05 15:48:53,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:48:53,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:53,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:48:53,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:48:53,062 INFO L87 Difference]: Start difference. First operand 7382 states and 24667 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:56,469 INFO L93 Difference]: Finished difference Result 14490 states and 46802 transitions. [2021-06-05 15:48:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:48:56,470 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:48:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:56,517 INFO L225 Difference]: With dead ends: 14490 [2021-06-05 15:48:56,517 INFO L226 Difference]: Without dead ends: 14422 [2021-06-05 15:48:56,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 2866.6ms TimeCoverageRelationStatistics Valid=1500, Invalid=7430, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 15:48:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14422 states. [2021-06-05 15:48:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14422 to 7458. [2021-06-05 15:48:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.347995172321309) internal successors, (24966), 7457 states have internal predecessors, (24966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 24966 transitions. [2021-06-05 15:48:56,649 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 24966 transitions. Word has length 34 [2021-06-05 15:48:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:56,649 INFO L482 AbstractCegarLoop]: Abstraction has 7458 states and 24966 transitions. [2021-06-05 15:48:56,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:56,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 24966 transitions. [2021-06-05 15:48:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:48:56,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:56,659 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:56,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 15:48:56,859 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash -891786065, now seen corresponding path program 20 times [2021-06-05 15:48:56,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:56,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157127210] [2021-06-05 15:48:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:57,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:57,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157127210] [2021-06-05 15:48:57,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157127210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:57,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042023984] [2021-06-05 15:48:57,118 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 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 [2021-06-05 15:48:57,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:48:57,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:48:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:57,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042023984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:57,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:57,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-06-05 15:48:57,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600087131] [2021-06-05 15:48:57,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:48:57,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:48:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:48:57,771 INFO L87 Difference]: Start difference. First operand 7458 states and 24966 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:01,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:01,474 INFO L93 Difference]: Finished difference Result 16738 states and 53735 transitions. [2021-06-05 15:49:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 15:49:01,474 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:01,502 INFO L225 Difference]: With dead ends: 16738 [2021-06-05 15:49:01,502 INFO L226 Difference]: Without dead ends: 16649 [2021-06-05 15:49:01,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 2994.8ms TimeCoverageRelationStatistics Valid=1578, Invalid=7352, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 15:49:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16649 states. [2021-06-05 15:49:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16649 to 7399. [2021-06-05 15:49:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 3.34279535009462) internal successors, (24730), 7398 states have internal predecessors, (24730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:01,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 24730 transitions. [2021-06-05 15:49:01,672 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 24730 transitions. Word has length 34 [2021-06-05 15:49:01,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:01,673 INFO L482 AbstractCegarLoop]: Abstraction has 7399 states and 24730 transitions. [2021-06-05 15:49:01,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 24730 transitions. [2021-06-05 15:49:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:01,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:01,681 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:01,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:01,885 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:01,885 INFO L82 PathProgramCache]: Analyzing trace with hash 829796399, now seen corresponding path program 21 times [2021-06-05 15:49:01,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:01,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870700502] [2021-06-05 15:49:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:02,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:02,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870700502] [2021-06-05 15:49:02,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870700502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:02,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607049925] [2021-06-05 15:49:02,115 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 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 [2021-06-05 15:49:02,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:49:02,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:02,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:49:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:02,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607049925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:02,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:02,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 15:49:02,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72272234] [2021-06-05 15:49:02,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:02,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:02,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:02,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:02,691 INFO L87 Difference]: Start difference. First operand 7399 states and 24730 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:06,412 INFO L93 Difference]: Finished difference Result 11618 states and 37622 transitions. [2021-06-05 15:49:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 15:49:06,412 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:06,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:06,430 INFO L225 Difference]: With dead ends: 11618 [2021-06-05 15:49:06,430 INFO L226 Difference]: Without dead ends: 11538 [2021-06-05 15:49:06,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2938.2ms TimeCoverageRelationStatistics Valid=1448, Invalid=6562, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:49:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11538 states. [2021-06-05 15:49:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11538 to 7515. [2021-06-05 15:49:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7515 states, 7514 states have (on average 3.344423742347618) internal successors, (25130), 7514 states have internal predecessors, (25130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:06,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7515 states to 7515 states and 25130 transitions. [2021-06-05 15:49:06,559 INFO L78 Accepts]: Start accepts. Automaton has 7515 states and 25130 transitions. Word has length 34 [2021-06-05 15:49:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:06,559 INFO L482 AbstractCegarLoop]: Abstraction has 7515 states and 25130 transitions. [2021-06-05 15:49:06,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 7515 states and 25130 transitions. [2021-06-05 15:49:06,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:06,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:06,569 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:06,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 15:49:06,769 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:06,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1324004089, now seen corresponding path program 22 times [2021-06-05 15:49:06,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:06,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489648807] [2021-06-05 15:49:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:06,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:06,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489648807] [2021-06-05 15:49:06,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489648807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:06,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507895495] [2021-06-05 15:49:06,982 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 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 [2021-06-05 15:49:07,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:49:07,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:07,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:49:07,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:07,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507895495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:07,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:07,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:49:07,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806368818] [2021-06-05 15:49:07,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:07,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:07,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:07,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:07,596 INFO L87 Difference]: Start difference. First operand 7515 states and 25130 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:08,647 INFO L93 Difference]: Finished difference Result 9401 states and 30720 transitions. [2021-06-05 15:49:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:49:08,647 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:08,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:08,661 INFO L225 Difference]: With dead ends: 9401 [2021-06-05 15:49:08,662 INFO L226 Difference]: Without dead ends: 9333 [2021-06-05 15:49:08,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1006.4ms TimeCoverageRelationStatistics Valid=387, Invalid=1869, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:49:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2021-06-05 15:49:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7545. [2021-06-05 15:49:08,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7544 states have (on average 3.345440084835631) internal successors, (25238), 7544 states have internal predecessors, (25238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 25238 transitions. [2021-06-05 15:49:08,784 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 25238 transitions. Word has length 34 [2021-06-05 15:49:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:08,785 INFO L482 AbstractCegarLoop]: Abstraction has 7545 states and 25238 transitions. [2021-06-05 15:49:08,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 25238 transitions. [2021-06-05 15:49:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:08,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:08,793 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:08,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 15:49:08,993 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:08,994 INFO L82 PathProgramCache]: Analyzing trace with hash -402301949, now seen corresponding path program 23 times [2021-06-05 15:49:08,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:08,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965252451] [2021-06-05 15:49:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:09,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:09,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965252451] [2021-06-05 15:49:09,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965252451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:09,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230929984] [2021-06-05 15:49:09,191 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 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 [2021-06-05 15:49:09,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:49:09,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:09,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:49:09,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:09,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230929984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:09,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:09,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:49:09,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304625991] [2021-06-05 15:49:09,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:09,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:09,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:09,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:09,891 INFO L87 Difference]: Start difference. First operand 7545 states and 25238 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:11,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:11,002 INFO L93 Difference]: Finished difference Result 10842 states and 35698 transitions. [2021-06-05 15:49:11,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:49:11,002 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:11,018 INFO L225 Difference]: With dead ends: 10842 [2021-06-05 15:49:11,018 INFO L226 Difference]: Without dead ends: 10762 [2021-06-05 15:49:11,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1203.9ms TimeCoverageRelationStatistics Valid=439, Invalid=2111, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:49:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2021-06-05 15:49:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 7545. [2021-06-05 15:49:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7544 states have (on average 3.345440084835631) internal successors, (25238), 7544 states have internal predecessors, (25238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 25238 transitions. [2021-06-05 15:49:11,158 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 25238 transitions. Word has length 34 [2021-06-05 15:49:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:11,158 INFO L482 AbstractCegarLoop]: Abstraction has 7545 states and 25238 transitions. [2021-06-05 15:49:11,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 25238 transitions. [2021-06-05 15:49:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:11,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:11,167 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:11,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:11,367 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:11,368 INFO L82 PathProgramCache]: Analyzing trace with hash -472411985, now seen corresponding path program 24 times [2021-06-05 15:49:11,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:11,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532268711] [2021-06-05 15:49:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:11,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:11,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532268711] [2021-06-05 15:49:11,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532268711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:11,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059624216] [2021-06-05 15:49:11,587 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:49:11,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:49:11,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:11,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:49:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:12,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059624216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:12,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:12,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 15:49:12,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909677305] [2021-06-05 15:49:12,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:49:12,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:49:12,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:49:12,114 INFO L87 Difference]: Start difference. First operand 7545 states and 25238 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:13,132 INFO L93 Difference]: Finished difference Result 10057 states and 33260 transitions. [2021-06-05 15:49:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:49:13,132 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:13,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:13,146 INFO L225 Difference]: With dead ends: 10057 [2021-06-05 15:49:13,147 INFO L226 Difference]: Without dead ends: 9977 [2021-06-05 15:49:13,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1024.9ms TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:49:13,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9977 states. [2021-06-05 15:49:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9977 to 7549. [2021-06-05 15:49:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7549 states, 7548 states have (on average 3.34525702172761) internal successors, (25250), 7548 states have internal predecessors, (25250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7549 states to 7549 states and 25250 transitions. [2021-06-05 15:49:13,268 INFO L78 Accepts]: Start accepts. Automaton has 7549 states and 25250 transitions. Word has length 34 [2021-06-05 15:49:13,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:13,268 INFO L482 AbstractCegarLoop]: Abstraction has 7549 states and 25250 transitions. [2021-06-05 15:49:13,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:13,268 INFO L276 IsEmpty]: Start isEmpty. Operand 7549 states and 25250 transitions. [2021-06-05 15:49:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:13,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:13,276 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:13,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 15:49:13,477 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:13,479 INFO L82 PathProgramCache]: Analyzing trace with hash 290892395, now seen corresponding path program 25 times [2021-06-05 15:49:13,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:13,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414142065] [2021-06-05 15:49:13,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:13,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:13,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414142065] [2021-06-05 15:49:13,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414142065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:13,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143248155] [2021-06-05 15:49:13,694 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 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 [2021-06-05 15:49:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:13,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:49:13,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:14,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143248155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:14,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:14,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:49:14,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098838717] [2021-06-05 15:49:14,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:49:14,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:14,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:49:14,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:49:14,318 INFO L87 Difference]: Start difference. First operand 7549 states and 25250 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:15,742 INFO L93 Difference]: Finished difference Result 10304 states and 33237 transitions. [2021-06-05 15:49:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:49:15,742 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:15,757 INFO L225 Difference]: With dead ends: 10304 [2021-06-05 15:49:15,757 INFO L226 Difference]: Without dead ends: 10170 [2021-06-05 15:49:15,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1398.4ms TimeCoverageRelationStatistics Valid=588, Invalid=2834, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:49:15,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-05 15:49:15,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 7672. [2021-06-05 15:49:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7672 states, 7671 states have (on average 3.3451961934558727) internal successors, (25661), 7671 states have internal predecessors, (25661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7672 states to 7672 states and 25661 transitions. [2021-06-05 15:49:15,879 INFO L78 Accepts]: Start accepts. Automaton has 7672 states and 25661 transitions. Word has length 34 [2021-06-05 15:49:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:15,879 INFO L482 AbstractCegarLoop]: Abstraction has 7672 states and 25661 transitions. [2021-06-05 15:49:15,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 7672 states and 25661 transitions. [2021-06-05 15:49:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:15,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:15,887 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:16,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:16,101 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:16,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1008460395, now seen corresponding path program 26 times [2021-06-05 15:49:16,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:16,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629425478] [2021-06-05 15:49:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:16,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:16,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629425478] [2021-06-05 15:49:16,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629425478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:16,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803127796] [2021-06-05 15:49:16,397 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 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 [2021-06-05 15:49:16,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:49:16,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:16,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:49:16,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:16,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803127796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:16,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:16,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 15:49:16,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927579157] [2021-06-05 15:49:16,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:16,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:16,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:16,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:16,972 INFO L87 Difference]: Start difference. First operand 7672 states and 25661 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:18,723 INFO L93 Difference]: Finished difference Result 13599 states and 43266 transitions. [2021-06-05 15:49:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:49:18,723 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:18,746 INFO L225 Difference]: With dead ends: 13599 [2021-06-05 15:49:18,746 INFO L226 Difference]: Without dead ends: 13421 [2021-06-05 15:49:18,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1749.3ms TimeCoverageRelationStatistics Valid=814, Invalid=3346, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:49:18,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2021-06-05 15:49:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 7674. [2021-06-05 15:49:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7674 states, 7673 states have (on average 3.345236543724749) internal successors, (25668), 7673 states have internal predecessors, (25668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 25668 transitions. [2021-06-05 15:49:18,934 INFO L78 Accepts]: Start accepts. Automaton has 7674 states and 25668 transitions. Word has length 34 [2021-06-05 15:49:18,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:18,934 INFO L482 AbstractCegarLoop]: Abstraction has 7674 states and 25668 transitions. [2021-06-05 15:49:18,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 7674 states and 25668 transitions. [2021-06-05 15:49:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:18,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:18,942 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:19,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 15:49:19,142 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:19,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:19,143 INFO L82 PathProgramCache]: Analyzing trace with hash -810749521, now seen corresponding path program 27 times [2021-06-05 15:49:19,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:19,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212140513] [2021-06-05 15:49:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:19,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:19,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212140513] [2021-06-05 15:49:19,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212140513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:19,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683000578] [2021-06-05 15:49:19,342 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 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 [2021-06-05 15:49:19,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:49:19,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:19,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:49:19,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:19,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683000578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:19,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:19,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 15:49:19,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72219710] [2021-06-05 15:49:19,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:49:19,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:49:19,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:49:19,846 INFO L87 Difference]: Start difference. First operand 7674 states and 25668 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:20,870 INFO L93 Difference]: Finished difference Result 10242 states and 33864 transitions. [2021-06-05 15:49:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:49:20,871 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:20,885 INFO L225 Difference]: With dead ends: 10242 [2021-06-05 15:49:20,886 INFO L226 Difference]: Without dead ends: 10162 [2021-06-05 15:49:20,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1013.0ms TimeCoverageRelationStatistics Valid=414, Invalid=1842, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:49:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10162 states. [2021-06-05 15:49:20,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10162 to 7686. [2021-06-05 15:49:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7686 states, 7685 states have (on average 3.34469746258946) internal successors, (25704), 7685 states have internal predecessors, (25704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:21,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7686 states to 7686 states and 25704 transitions. [2021-06-05 15:49:21,005 INFO L78 Accepts]: Start accepts. Automaton has 7686 states and 25704 transitions. Word has length 34 [2021-06-05 15:49:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:21,006 INFO L482 AbstractCegarLoop]: Abstraction has 7686 states and 25704 transitions. [2021-06-05 15:49:21,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 7686 states and 25704 transitions. [2021-06-05 15:49:21,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:21,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:21,015 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:21,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:21,229 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:21,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2119003857, now seen corresponding path program 28 times [2021-06-05 15:49:21,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:21,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802376043] [2021-06-05 15:49:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:21,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:21,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802376043] [2021-06-05 15:49:21,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802376043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:21,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906693479] [2021-06-05 15:49:21,448 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 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 [2021-06-05 15:49:21,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:49:21,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:21,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:49:21,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:22,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906693479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:22,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:22,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:49:22,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463744476] [2021-06-05 15:49:22,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:49:22,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:49:22,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:49:22,075 INFO L87 Difference]: Start difference. First operand 7686 states and 25704 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:23,213 INFO L93 Difference]: Finished difference Result 11237 states and 36295 transitions. [2021-06-05 15:49:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:49:23,213 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:23,229 INFO L225 Difference]: With dead ends: 11237 [2021-06-05 15:49:23,229 INFO L226 Difference]: Without dead ends: 11176 [2021-06-05 15:49:23,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1261.2ms TimeCoverageRelationStatistics Valid=474, Invalid=2496, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:49:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11176 states. [2021-06-05 15:49:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11176 to 7730. [2021-06-05 15:49:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 3.3486867641350755) internal successors, (25882), 7729 states have internal predecessors, (25882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 25882 transitions. [2021-06-05 15:49:23,358 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 25882 transitions. Word has length 34 [2021-06-05 15:49:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:23,358 INFO L482 AbstractCegarLoop]: Abstraction has 7730 states and 25882 transitions. [2021-06-05 15:49:23,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 25882 transitions. [2021-06-05 15:49:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:23,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:23,367 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:23,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 15:49:23,568 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash 148717615, now seen corresponding path program 29 times [2021-06-05 15:49:23,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:23,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438833530] [2021-06-05 15:49:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:23,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:23,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438833530] [2021-06-05 15:49:23,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438833530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:23,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591893485] [2021-06-05 15:49:23,788 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 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 [2021-06-05 15:49:23,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:49:23,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:23,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:49:23,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:24,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591893485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:24,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:24,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:49:24,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384279245] [2021-06-05 15:49:24,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:49:24,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:24,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:49:24,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:49:24,440 INFO L87 Difference]: Start difference. First operand 7730 states and 25882 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:26,884 INFO L93 Difference]: Finished difference Result 15447 states and 50397 transitions. [2021-06-05 15:49:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:49:26,884 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:26,910 INFO L225 Difference]: With dead ends: 15447 [2021-06-05 15:49:26,910 INFO L226 Difference]: Without dead ends: 15367 [2021-06-05 15:49:26,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 2159.5ms TimeCoverageRelationStatistics Valid=1019, Invalid=5143, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:49:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15367 states. [2021-06-05 15:49:27,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15367 to 7685. [2021-06-05 15:49:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-06-05 15:49:27,069 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-06-05 15:49:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:27,070 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-06-05 15:49:27,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-06-05 15:49:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:27,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:27,079 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:27,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:27,279 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:27,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:27,279 INFO L82 PathProgramCache]: Analyzing trace with hash 873755055, now seen corresponding path program 30 times [2021-06-05 15:49:27,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:27,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507998206] [2021-06-05 15:49:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:27,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:27,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507998206] [2021-06-05 15:49:27,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507998206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:27,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108069512] [2021-06-05 15:49:27,501 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 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 [2021-06-05 15:49:27,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:49:27,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:27,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:49:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:28,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108069512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:28,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:28,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 15:49:28,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627976049] [2021-06-05 15:49:28,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:49:28,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:28,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:49:28,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:49:28,007 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:28,980 INFO L93 Difference]: Finished difference Result 10155 states and 33589 transitions. [2021-06-05 15:49:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:49:28,980 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:28,996 INFO L225 Difference]: With dead ends: 10155 [2021-06-05 15:49:28,996 INFO L226 Difference]: Without dead ends: 10075 [2021-06-05 15:49:28,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1011.1ms TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:49:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10075 states. [2021-06-05 15:49:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10075 to 7685. [2021-06-05 15:49:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-06-05 15:49:29,125 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-06-05 15:49:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:29,125 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-06-05 15:49:29,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-06-05 15:49:29,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:29,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:29,134 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:29,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 15:49:29,335 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:29,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:29,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1810559919, now seen corresponding path program 31 times [2021-06-05 15:49:29,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:29,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768729139] [2021-06-05 15:49:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:29,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:29,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768729139] [2021-06-05 15:49:29,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768729139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:29,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132754639] [2021-06-05 15:49:29,524 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 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 [2021-06-05 15:49:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:29,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:49:29,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:30,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132754639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:30,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:30,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:49:30,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530928442] [2021-06-05 15:49:30,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:30,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:30,075 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:30,978 INFO L93 Difference]: Finished difference Result 9851 states and 32529 transitions. [2021-06-05 15:49:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:49:30,978 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:30,995 INFO L225 Difference]: With dead ends: 9851 [2021-06-05 15:49:30,995 INFO L226 Difference]: Without dead ends: 9771 [2021-06-05 15:49:30,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 980.5ms TimeCoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:49:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9771 states. [2021-06-05 15:49:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9771 to 7685. [2021-06-05 15:49:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-06-05 15:49:31,112 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-06-05 15:49:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:31,112 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-06-05 15:49:31,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-06-05 15:49:31,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:31,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:31,120 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:31,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:31,325 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:31,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1645184831, now seen corresponding path program 32 times [2021-06-05 15:49:31,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:31,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595113932] [2021-06-05 15:49:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:31,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:31,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595113932] [2021-06-05 15:49:31,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595113932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:31,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255066900] [2021-06-05 15:49:31,557 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 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 [2021-06-05 15:49:31,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:49:31,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:31,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:49:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:32,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255066900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:32,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:32,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 15:49:32,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508875507] [2021-06-05 15:49:32,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:32,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:32,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:32,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:32,127 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:34,643 INFO L93 Difference]: Finished difference Result 12991 states and 42326 transitions. [2021-06-05 15:49:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:49:34,643 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:34,664 INFO L225 Difference]: With dead ends: 12991 [2021-06-05 15:49:34,664 INFO L226 Difference]: Without dead ends: 12911 [2021-06-05 15:49:34,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 2041.3ms TimeCoverageRelationStatistics Valid=863, Invalid=4539, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:49:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2021-06-05 15:49:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 7733. [2021-06-05 15:49:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7733 states, 7732 states have (on average 3.3441541645111226) internal successors, (25857), 7732 states have internal predecessors, (25857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7733 states to 7733 states and 25857 transitions. [2021-06-05 15:49:34,808 INFO L78 Accepts]: Start accepts. Automaton has 7733 states and 25857 transitions. Word has length 34 [2021-06-05 15:49:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:34,808 INFO L482 AbstractCegarLoop]: Abstraction has 7733 states and 25857 transitions. [2021-06-05 15:49:34,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 7733 states and 25857 transitions. [2021-06-05 15:49:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:34,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:34,816 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:35,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 15:49:35,017 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash -508615657, now seen corresponding path program 33 times [2021-06-05 15:49:35,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:35,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076560190] [2021-06-05 15:49:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:35,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:35,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076560190] [2021-06-05 15:49:35,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076560190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:35,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199235930] [2021-06-05 15:49:35,223 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 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 [2021-06-05 15:49:35,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:49:35,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:35,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:49:35,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:35,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199235930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:35,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:35,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 15:49:35,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4742274] [2021-06-05 15:49:35,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:49:35,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:35,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:49:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:49:35,731 INFO L87 Difference]: Start difference. First operand 7733 states and 25857 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:37,201 INFO L93 Difference]: Finished difference Result 10389 states and 33911 transitions. [2021-06-05 15:49:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:49:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:37,217 INFO L225 Difference]: With dead ends: 10389 [2021-06-05 15:49:37,217 INFO L226 Difference]: Without dead ends: 10315 [2021-06-05 15:49:37,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1177.3ms TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:49:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10315 states. [2021-06-05 15:49:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10315 to 7770. [2021-06-05 15:49:37,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7770 states, 7769 states have (on average 3.3457330415754925) internal successors, (25993), 7769 states have internal predecessors, (25993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 25993 transitions. [2021-06-05 15:49:37,350 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 25993 transitions. Word has length 34 [2021-06-05 15:49:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:37,350 INFO L482 AbstractCegarLoop]: Abstraction has 7770 states and 25993 transitions. [2021-06-05 15:49:37,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 25993 transitions. [2021-06-05 15:49:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:37,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:37,359 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:37,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 15:49:37,573 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash 342976447, now seen corresponding path program 34 times [2021-06-05 15:49:37,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:37,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952952877] [2021-06-05 15:49:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:37,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:37,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952952877] [2021-06-05 15:49:37,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952952877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:37,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708794487] [2021-06-05 15:49:37,766 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:49:37,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:49:37,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:37,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:49:37,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:38,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708794487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:38,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:38,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:49:38,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8661065] [2021-06-05 15:49:38,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:38,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:38,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:38,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:38,316 INFO L87 Difference]: Start difference. First operand 7770 states and 25993 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:39,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:39,627 INFO L93 Difference]: Finished difference Result 11540 states and 38141 transitions. [2021-06-05 15:49:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:49:39,627 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:39,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:39,646 INFO L225 Difference]: With dead ends: 11540 [2021-06-05 15:49:39,646 INFO L226 Difference]: Without dead ends: 11460 [2021-06-05 15:49:39,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1113.9ms TimeCoverageRelationStatistics Valid=447, Invalid=2205, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:49:39,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2021-06-05 15:49:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 7774. [2021-06-05 15:49:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7774 states, 7773 states have (on average 3.3455551267206998) internal successors, (26005), 7773 states have internal predecessors, (26005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7774 states to 7774 states and 26005 transitions. [2021-06-05 15:49:39,788 INFO L78 Accepts]: Start accepts. Automaton has 7774 states and 26005 transitions. Word has length 34 [2021-06-05 15:49:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:39,788 INFO L482 AbstractCegarLoop]: Abstraction has 7774 states and 26005 transitions. [2021-06-05 15:49:39,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7774 states and 26005 transitions. [2021-06-05 15:49:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:39,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:39,797 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:39,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:39,997 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1106280827, now seen corresponding path program 35 times [2021-06-05 15:49:39,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:39,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086123067] [2021-06-05 15:49:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:40,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:40,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086123067] [2021-06-05 15:49:40,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086123067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:40,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825992575] [2021-06-05 15:49:40,208 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:49:40,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:49:40,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:40,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:49:40,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:40,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825992575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:40,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:40,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:49:40,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833352048] [2021-06-05 15:49:40,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:49:40,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:49:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:49:40,823 INFO L87 Difference]: Start difference. First operand 7774 states and 26005 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:42,462 INFO L93 Difference]: Finished difference Result 11043 states and 35560 transitions. [2021-06-05 15:49:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:49:42,462 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:42,478 INFO L225 Difference]: With dead ends: 11043 [2021-06-05 15:49:42,478 INFO L226 Difference]: Without dead ends: 10909 [2021-06-05 15:49:42,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1477.0ms TimeCoverageRelationStatistics Valid=597, Invalid=3063, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:49:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-06-05 15:49:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 7897. [2021-06-05 15:49:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7897 states, 7896 states have (on average 3.3456180344478215) internal successors, (26417), 7896 states have internal predecessors, (26417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7897 states to 7897 states and 26417 transitions. [2021-06-05 15:49:42,609 INFO L78 Accepts]: Start accepts. Automaton has 7897 states and 26417 transitions. Word has length 34 [2021-06-05 15:49:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:42,609 INFO L482 AbstractCegarLoop]: Abstraction has 7897 states and 26417 transitions. [2021-06-05 15:49:42,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 7897 states and 26417 transitions. [2021-06-05 15:49:42,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:42,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:42,618 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:42,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 15:49:42,818 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1823848827, now seen corresponding path program 36 times [2021-06-05 15:49:42,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:42,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809180428] [2021-06-05 15:49:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:43,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:43,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809180428] [2021-06-05 15:49:43,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809180428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:43,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491488188] [2021-06-05 15:49:43,036 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 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 [2021-06-05 15:49:43,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:49:43,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:43,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:49:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:43,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491488188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:43,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:43,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 15:49:43,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384094102] [2021-06-05 15:49:43,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:43,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:43,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:43,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:43,543 INFO L87 Difference]: Start difference. First operand 7897 states and 26417 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:45,395 INFO L93 Difference]: Finished difference Result 14412 states and 45857 transitions. [2021-06-05 15:49:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:49:45,395 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:45,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:45,417 INFO L225 Difference]: With dead ends: 14412 [2021-06-05 15:49:45,418 INFO L226 Difference]: Without dead ends: 14234 [2021-06-05 15:49:45,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 1645.7ms TimeCoverageRelationStatistics Valid=810, Invalid=3480, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:49:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14234 states. [2021-06-05 15:49:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14234 to 7884. [2021-06-05 15:49:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 7883 states have (on average 3.344792591652924) internal successors, (26367), 7883 states have internal predecessors, (26367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 26367 transitions. [2021-06-05 15:49:45,574 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 26367 transitions. Word has length 34 [2021-06-05 15:49:45,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:45,574 INFO L482 AbstractCegarLoop]: Abstraction has 7884 states and 26367 transitions. [2021-06-05 15:49:45,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 26367 transitions. [2021-06-05 15:49:45,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:45,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:45,582 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:45,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:45,783 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:45,783 INFO L82 PathProgramCache]: Analyzing trace with hash 4638911, now seen corresponding path program 37 times [2021-06-05 15:49:45,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:45,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45344053] [2021-06-05 15:49:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:45,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:45,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45344053] [2021-06-05 15:49:45,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45344053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:45,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557775055] [2021-06-05 15:49:45,966 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 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 [2021-06-05 15:49:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:45,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:49:45,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:46,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557775055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:46,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:46,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:49:46,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78705791] [2021-06-05 15:49:46,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:46,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:46,500 INFO L87 Difference]: Start difference. First operand 7884 states and 26367 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:47,682 INFO L93 Difference]: Finished difference Result 11462 states and 37893 transitions. [2021-06-05 15:49:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:49:47,683 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:47,699 INFO L225 Difference]: With dead ends: 11462 [2021-06-05 15:49:47,700 INFO L226 Difference]: Without dead ends: 11382 [2021-06-05 15:49:47,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1090.5ms TimeCoverageRelationStatistics Valid=421, Invalid=2129, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:49:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2021-06-05 15:49:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 7876. [2021-06-05 15:49:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7876 states, 7875 states have (on average 3.345142857142857) internal successors, (26343), 7875 states have internal predecessors, (26343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7876 states to 7876 states and 26343 transitions. [2021-06-05 15:49:47,840 INFO L78 Accepts]: Start accepts. Automaton has 7876 states and 26343 transitions. Word has length 34 [2021-06-05 15:49:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:47,840 INFO L482 AbstractCegarLoop]: Abstraction has 7876 states and 26343 transitions. [2021-06-05 15:49:47,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7876 states and 26343 transitions. [2021-06-05 15:49:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:47,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:47,849 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:48,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 15:49:48,052 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:48,052 INFO L82 PathProgramCache]: Analyzing trace with hash 809080239, now seen corresponding path program 38 times [2021-06-05 15:49:48,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:48,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752567248] [2021-06-05 15:49:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:48,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:48,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752567248] [2021-06-05 15:49:48,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752567248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:48,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926973204] [2021-06-05 15:49:48,273 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 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 [2021-06-05 15:49:48,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:49:48,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:48,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:49:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:48,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926973204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:48,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:48,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 15:49:48,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476878382] [2021-06-05 15:49:48,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:48,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:48,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:48,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:48,796 INFO L87 Difference]: Start difference. First operand 7876 states and 26343 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:51,424 INFO L93 Difference]: Finished difference Result 11431 states and 37218 transitions. [2021-06-05 15:49:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:49:51,424 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:51,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:51,441 INFO L225 Difference]: With dead ends: 11431 [2021-06-05 15:49:51,441 INFO L226 Difference]: Without dead ends: 11364 [2021-06-05 15:49:51,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 2220.9ms TimeCoverageRelationStatistics Valid=876, Invalid=4674, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:49:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11364 states. [2021-06-05 15:49:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11364 to 8088. [2021-06-05 15:49:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8088 states, 8087 states have (on average 3.344503524174601) internal successors, (27047), 8087 states have internal predecessors, (27047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8088 states to 8088 states and 27047 transitions. [2021-06-05 15:49:51,592 INFO L78 Accepts]: Start accepts. Automaton has 8088 states and 27047 transitions. Word has length 34 [2021-06-05 15:49:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:51,592 INFO L482 AbstractCegarLoop]: Abstraction has 8088 states and 27047 transitions. [2021-06-05 15:49:51,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 8088 states and 27047 transitions. [2021-06-05 15:49:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:51,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:51,601 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:51,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 15:49:51,801 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:51,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1344720249, now seen corresponding path program 39 times [2021-06-05 15:49:51,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:51,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494849196] [2021-06-05 15:49:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:52,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:52,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494849196] [2021-06-05 15:49:52,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494849196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:52,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118255657] [2021-06-05 15:49:52,011 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 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 [2021-06-05 15:49:52,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:49:52,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:52,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:49:52,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:52,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118255657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:52,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:52,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 15:49:52,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907814853] [2021-06-05 15:49:52,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:49:52,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:52,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:49:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:49:52,497 INFO L87 Difference]: Start difference. First operand 8088 states and 27047 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:54,428 INFO L93 Difference]: Finished difference Result 11398 states and 37361 transitions. [2021-06-05 15:49:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:49:54,429 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:54,445 INFO L225 Difference]: With dead ends: 11398 [2021-06-05 15:49:54,445 INFO L226 Difference]: Without dead ends: 11324 [2021-06-05 15:49:54,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1661.1ms TimeCoverageRelationStatistics Valid=610, Invalid=3172, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:49:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11324 states. [2021-06-05 15:49:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11324 to 8124. [2021-06-05 15:49:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 3.345931306167672) internal successors, (27179), 8123 states have internal predecessors, (27179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 27179 transitions. [2021-06-05 15:49:54,580 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 27179 transitions. Word has length 34 [2021-06-05 15:49:54,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:54,580 INFO L482 AbstractCegarLoop]: Abstraction has 8124 states and 27179 transitions. [2021-06-05 15:49:54,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 27179 transitions. [2021-06-05 15:49:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:54,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:54,590 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:54,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:54,790 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:54,791 INFO L82 PathProgramCache]: Analyzing trace with hash -493128145, now seen corresponding path program 40 times [2021-06-05 15:49:54,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:54,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94414707] [2021-06-05 15:49:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:55,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:55,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94414707] [2021-06-05 15:49:55,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94414707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:55,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527907122] [2021-06-05 15:49:55,000 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 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 [2021-06-05 15:49:55,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:49:55,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:55,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:49:55,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:55,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527907122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:55,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:55,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:49:55,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122405605] [2021-06-05 15:49:55,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:49:55,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:55,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:49:55,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:49:55,522 INFO L87 Difference]: Start difference. First operand 8124 states and 27179 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:56,820 INFO L93 Difference]: Finished difference Result 12758 states and 41655 transitions. [2021-06-05 15:49:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:49:56,821 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:49:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:56,840 INFO L225 Difference]: With dead ends: 12758 [2021-06-05 15:49:56,841 INFO L226 Difference]: Without dead ends: 12678 [2021-06-05 15:49:56,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1245.1ms TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:49:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2021-06-05 15:49:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 8126. [2021-06-05 15:49:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8126 states, 8125 states have (on average 3.345846153846154) internal successors, (27185), 8125 states have internal predecessors, (27185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8126 states to 8126 states and 27185 transitions. [2021-06-05 15:49:56,981 INFO L78 Accepts]: Start accepts. Automaton has 8126 states and 27185 transitions. Word has length 34 [2021-06-05 15:49:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:56,981 INFO L482 AbstractCegarLoop]: Abstraction has 8126 states and 27185 transitions. [2021-06-05 15:49:56,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 8126 states and 27185 transitions. [2021-06-05 15:49:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:49:56,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:56,990 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:57,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 15:49:57,191 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:57,191 INFO L82 PathProgramCache]: Analyzing trace with hash 270176235, now seen corresponding path program 41 times [2021-06-05 15:49:57,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:57,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265640975] [2021-06-05 15:49:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:57,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:57,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265640975] [2021-06-05 15:49:57,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265640975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:57,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118137699] [2021-06-05 15:49:57,430 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 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 [2021-06-05 15:49:57,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:49:57,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:57,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:49:57,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:58,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118137699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:58,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:58,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:49:58,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439358283] [2021-06-05 15:49:58,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:49:58,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:58,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:49:58,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:49:58,006 INFO L87 Difference]: Start difference. First operand 8126 states and 27185 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:00,484 INFO L93 Difference]: Finished difference Result 13402 states and 43284 transitions. [2021-06-05 15:50:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 15:50:00,485 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:00,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:00,505 INFO L225 Difference]: With dead ends: 13402 [2021-06-05 15:50:00,506 INFO L226 Difference]: Without dead ends: 13334 [2021-06-05 15:50:00,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 2086.8ms TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:50:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13334 states. [2021-06-05 15:50:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13334 to 8624. [2021-06-05 15:50:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8624 states, 8623 states have (on average 3.339325060883683) internal successors, (28795), 8623 states have internal predecessors, (28795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8624 states to 8624 states and 28795 transitions. [2021-06-05 15:50:00,658 INFO L78 Accepts]: Start accepts. Automaton has 8624 states and 28795 transitions. Word has length 34 [2021-06-05 15:50:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:00,658 INFO L482 AbstractCegarLoop]: Abstraction has 8624 states and 28795 transitions. [2021-06-05 15:50:00,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 8624 states and 28795 transitions. [2021-06-05 15:50:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:00,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:00,667 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:00,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:00,868 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:00,868 INFO L82 PathProgramCache]: Analyzing trace with hash 987744235, now seen corresponding path program 42 times [2021-06-05 15:50:00,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:00,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861048006] [2021-06-05 15:50:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:01,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:01,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861048006] [2021-06-05 15:50:01,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861048006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:01,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348584586] [2021-06-05 15:50:01,202 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 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 [2021-06-05 15:50:01,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:50:01,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:01,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:50:01,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:01,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348584586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:01,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:01,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 15:50:01,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316394452] [2021-06-05 15:50:01,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:01,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:01,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:01,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:01,749 INFO L87 Difference]: Start difference. First operand 8624 states and 28795 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:03,420 INFO L93 Difference]: Finished difference Result 16986 states and 55205 transitions. [2021-06-05 15:50:03,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:50:03,420 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:03,448 INFO L225 Difference]: With dead ends: 16986 [2021-06-05 15:50:03,449 INFO L226 Difference]: Without dead ends: 16888 [2021-06-05 15:50:03,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1569.9ms TimeCoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:50:03,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16888 states. [2021-06-05 15:50:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16888 to 8622. [2021-06-05 15:50:03,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.3391717898155666) internal successors, (28787), 8621 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 28787 transitions. [2021-06-05 15:50:03,668 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 28787 transitions. Word has length 34 [2021-06-05 15:50:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:03,668 INFO L482 AbstractCegarLoop]: Abstraction has 8622 states and 28787 transitions. [2021-06-05 15:50:03,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 28787 transitions. [2021-06-05 15:50:03,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:03,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:03,678 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:03,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 15:50:03,879 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:03,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:03,879 INFO L82 PathProgramCache]: Analyzing trace with hash -831465681, now seen corresponding path program 43 times [2021-06-05 15:50:03,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:03,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626822052] [2021-06-05 15:50:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:04,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:04,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626822052] [2021-06-05 15:50:04,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626822052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:04,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368514487] [2021-06-05 15:50:04,162 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 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 [2021-06-05 15:50:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:04,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:50:04,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:04,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368514487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:04,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:04,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:50:04,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416298816] [2021-06-05 15:50:04,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:04,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:04,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:04,730 INFO L87 Difference]: Start difference. First operand 8622 states and 28787 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:06,222 INFO L93 Difference]: Finished difference Result 14190 states and 46183 transitions. [2021-06-05 15:50:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:50:06,222 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:06,248 INFO L225 Difference]: With dead ends: 14190 [2021-06-05 15:50:06,248 INFO L226 Difference]: Without dead ends: 14110 [2021-06-05 15:50:06,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1343.7ms TimeCoverageRelationStatistics Valid=507, Invalid=2249, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:50:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14110 states. [2021-06-05 15:50:06,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14110 to 8630. [2021-06-05 15:50:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8629 states have (on average 3.3388573415227722) internal successors, (28811), 8629 states have internal predecessors, (28811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 28811 transitions. [2021-06-05 15:50:06,432 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 28811 transitions. Word has length 34 [2021-06-05 15:50:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:06,432 INFO L482 AbstractCegarLoop]: Abstraction has 8630 states and 28811 transitions. [2021-06-05 15:50:06,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 28811 transitions. [2021-06-05 15:50:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:06,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:06,443 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:06,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:06,643 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:06,643 INFO L82 PathProgramCache]: Analyzing trace with hash -743901889, now seen corresponding path program 44 times [2021-06-05 15:50:06,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:06,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696637747] [2021-06-05 15:50:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:06,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:06,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696637747] [2021-06-05 15:50:06,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696637747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:06,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523845729] [2021-06-05 15:50:06,926 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:50:06,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:50:06,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:06,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:50:06,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:07,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523845729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:07,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:07,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 15:50:07,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439924195] [2021-06-05 15:50:07,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:50:07,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:07,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:50:07,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:07,491 INFO L87 Difference]: Start difference. First operand 8630 states and 28811 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:10,407 INFO L93 Difference]: Finished difference Result 15771 states and 50789 transitions. [2021-06-05 15:50:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:50:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:10,431 INFO L225 Difference]: With dead ends: 15771 [2021-06-05 15:50:10,431 INFO L226 Difference]: Without dead ends: 15691 [2021-06-05 15:50:10,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 2433.1ms TimeCoverageRelationStatistics Valid=899, Invalid=4801, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 15:50:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15691 states. [2021-06-05 15:50:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15691 to 9020. [2021-06-05 15:50:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9020 states, 9019 states have (on average 3.351036700299368) internal successors, (30223), 9019 states have internal predecessors, (30223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9020 states to 9020 states and 30223 transitions. [2021-06-05 15:50:10,617 INFO L78 Accepts]: Start accepts. Automaton has 9020 states and 30223 transitions. Word has length 34 [2021-06-05 15:50:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:10,617 INFO L482 AbstractCegarLoop]: Abstraction has 9020 states and 30223 transitions. [2021-06-05 15:50:10,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 9020 states and 30223 transitions. [2021-06-05 15:50:10,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:10,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:10,627 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:10,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:10,828 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:10,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1130059071, now seen corresponding path program 45 times [2021-06-05 15:50:10,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:10,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434807579] [2021-06-05 15:50:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:11,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:11,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434807579] [2021-06-05 15:50:11,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434807579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:11,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819951299] [2021-06-05 15:50:11,057 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:50:11,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:50:11,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:11,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:50:11,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:11,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819951299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:11,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:11,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 15:50:11,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582832888] [2021-06-05 15:50:11,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:50:11,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:11,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:50:11,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:11,576 INFO L87 Difference]: Start difference. First operand 9020 states and 30223 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:13,565 INFO L93 Difference]: Finished difference Result 15861 states and 52080 transitions. [2021-06-05 15:50:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:50:13,566 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:13,591 INFO L225 Difference]: With dead ends: 15861 [2021-06-05 15:50:13,591 INFO L226 Difference]: Without dead ends: 15781 [2021-06-05 15:50:13,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1605.1ms TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:50:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15781 states. [2021-06-05 15:50:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15781 to 9108. [2021-06-05 15:50:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9108 states, 9107 states have (on average 3.3542330075765894) internal successors, (30547), 9107 states have internal predecessors, (30547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9108 states to 9108 states and 30547 transitions. [2021-06-05 15:50:13,781 INFO L78 Accepts]: Start accepts. Automaton has 9108 states and 30547 transitions. Word has length 34 [2021-06-05 15:50:13,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:13,781 INFO L482 AbstractCegarLoop]: Abstraction has 9108 states and 30547 transitions. [2021-06-05 15:50:13,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 9108 states and 30547 transitions. [2021-06-05 15:50:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:13,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:13,792 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:13,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 15:50:13,992 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash 306804211, now seen corresponding path program 46 times [2021-06-05 15:50:13,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:13,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712700825] [2021-06-05 15:50:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:14,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:14,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712700825] [2021-06-05 15:50:14,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712700825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:14,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438899744] [2021-06-05 15:50:14,200 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 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 [2021-06-05 15:50:14,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:50:14,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:14,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:50:14,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:14,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438899744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:14,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:14,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:50:14,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016726154] [2021-06-05 15:50:14,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:50:14,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:14,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:50:14,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:50:14,867 INFO L87 Difference]: Start difference. First operand 9108 states and 30547 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:16,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:16,112 INFO L93 Difference]: Finished difference Result 14291 states and 46571 transitions. [2021-06-05 15:50:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:50:16,113 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:16,135 INFO L225 Difference]: With dead ends: 14291 [2021-06-05 15:50:16,135 INFO L226 Difference]: Without dead ends: 14230 [2021-06-05 15:50:16,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1302.6ms TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:50:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14230 states. [2021-06-05 15:50:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14230 to 9186. [2021-06-05 15:50:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9186 states, 9185 states have (on average 3.3555797495917257) internal successors, (30821), 9185 states have internal predecessors, (30821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9186 states to 9186 states and 30821 transitions. [2021-06-05 15:50:16,307 INFO L78 Accepts]: Start accepts. Automaton has 9186 states and 30821 transitions. Word has length 34 [2021-06-05 15:50:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:16,307 INFO L482 AbstractCegarLoop]: Abstraction has 9186 states and 30821 transitions. [2021-06-05 15:50:16,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 9186 states and 30821 transitions. [2021-06-05 15:50:16,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:16,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:16,317 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:16,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:16,517 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:16,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:16,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1720441613, now seen corresponding path program 47 times [2021-06-05 15:50:16,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:16,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016121954] [2021-06-05 15:50:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:16,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:16,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016121954] [2021-06-05 15:50:16,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016121954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:16,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536942008] [2021-06-05 15:50:16,737 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 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 [2021-06-05 15:50:16,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:50:16,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:16,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:50:16,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:17,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536942008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:17,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:17,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:50:17,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415360883] [2021-06-05 15:50:17,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:50:17,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:17,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:50:17,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:50:17,279 INFO L87 Difference]: Start difference. First operand 9186 states and 30821 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:19,848 INFO L93 Difference]: Finished difference Result 19194 states and 63283 transitions. [2021-06-05 15:50:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 15:50:19,849 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:19,880 INFO L225 Difference]: With dead ends: 19194 [2021-06-05 15:50:19,880 INFO L226 Difference]: Without dead ends: 19114 [2021-06-05 15:50:19,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1973.0ms TimeCoverageRelationStatistics Valid=915, Invalid=4635, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:50:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19114 states. [2021-06-05 15:50:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19114 to 9171. [2021-06-05 15:50:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9171 states, 9170 states have (on average 3.353435114503817) internal successors, (30751), 9170 states have internal predecessors, (30751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9171 states to 9171 states and 30751 transitions. [2021-06-05 15:50:20,081 INFO L78 Accepts]: Start accepts. Automaton has 9171 states and 30751 transitions. Word has length 34 [2021-06-05 15:50:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:20,081 INFO L482 AbstractCegarLoop]: Abstraction has 9171 states and 30751 transitions. [2021-06-05 15:50:20,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 9171 states and 30751 transitions. [2021-06-05 15:50:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:20,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:20,092 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:20,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 15:50:20,292 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:20,292 INFO L82 PathProgramCache]: Analyzing trace with hash -995404173, now seen corresponding path program 48 times [2021-06-05 15:50:20,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:20,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463175234] [2021-06-05 15:50:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:20,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:20,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463175234] [2021-06-05 15:50:20,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463175234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:20,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939022794] [2021-06-05 15:50:20,493 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 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 [2021-06-05 15:50:20,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:50:20,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:20,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:50:20,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:21,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939022794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:21,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:21,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 15:50:21,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148216905] [2021-06-05 15:50:21,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:50:21,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:21,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:50:21,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:21,033 INFO L87 Difference]: Start difference. First operand 9171 states and 30751 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:22,393 INFO L93 Difference]: Finished difference Result 12967 states and 43188 transitions. [2021-06-05 15:50:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:50:22,394 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:22,418 INFO L225 Difference]: With dead ends: 12967 [2021-06-05 15:50:22,418 INFO L226 Difference]: Without dead ends: 12887 [2021-06-05 15:50:22,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1129.3ms TimeCoverageRelationStatistics Valid=468, Invalid=1982, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:50:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12887 states. [2021-06-05 15:50:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12887 to 9179. [2021-06-05 15:50:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9179 states, 9178 states have (on average 3.3531270429287425) internal successors, (30775), 9178 states have internal predecessors, (30775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9179 states to 9179 states and 30775 transitions. [2021-06-05 15:50:22,584 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 30775 transitions. Word has length 34 [2021-06-05 15:50:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:22,585 INFO L482 AbstractCegarLoop]: Abstraction has 9179 states and 30775 transitions. [2021-06-05 15:50:22,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 30775 transitions. [2021-06-05 15:50:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:22,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:22,595 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:22,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:22,795 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:22,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:22,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1333741709, now seen corresponding path program 49 times [2021-06-05 15:50:22,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:22,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673559067] [2021-06-05 15:50:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:22,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:22,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673559067] [2021-06-05 15:50:22,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673559067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:22,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755168749] [2021-06-05 15:50:22,996 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 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 [2021-06-05 15:50:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:23,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:50:23,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:23,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755168749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:23,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:23,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:50:23,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118852795] [2021-06-05 15:50:23,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:23,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:23,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:23,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:23,508 INFO L87 Difference]: Start difference. First operand 9179 states and 30775 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:24,839 INFO L93 Difference]: Finished difference Result 12929 states and 43085 transitions. [2021-06-05 15:50:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:50:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:24,861 INFO L225 Difference]: With dead ends: 12929 [2021-06-05 15:50:24,861 INFO L226 Difference]: Without dead ends: 12849 [2021-06-05 15:50:24,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1141.0ms TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:50:24,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12849 states. [2021-06-05 15:50:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12849 to 9181. [2021-06-05 15:50:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9181 states, 9180 states have (on average 3.353050108932462) internal successors, (30781), 9180 states have internal predecessors, (30781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9181 states to 9181 states and 30781 transitions. [2021-06-05 15:50:25,021 INFO L78 Accepts]: Start accepts. Automaton has 9181 states and 30781 transitions. Word has length 34 [2021-06-05 15:50:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:25,021 INFO L482 AbstractCegarLoop]: Abstraction has 9181 states and 30781 transitions. [2021-06-05 15:50:25,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 9181 states and 30781 transitions. [2021-06-05 15:50:25,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:25,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:25,031 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:25,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 15:50:25,232 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:25,232 INFO L82 PathProgramCache]: Analyzing trace with hash -58599309, now seen corresponding path program 50 times [2021-06-05 15:50:25,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:25,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501852551] [2021-06-05 15:50:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:25,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:25,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501852551] [2021-06-05 15:50:25,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501852551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:25,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306418264] [2021-06-05 15:50:25,421 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 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 [2021-06-05 15:50:25,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:50:25,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:25,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:50:25,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:25,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306418264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:25,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:25,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 15:50:25,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302120339] [2021-06-05 15:50:25,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:50:25,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:25,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:50:25,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:25,933 INFO L87 Difference]: Start difference. First operand 9181 states and 30781 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:27,278 INFO L93 Difference]: Finished difference Result 12817 states and 42681 transitions. [2021-06-05 15:50:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:50:27,279 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:27,299 INFO L225 Difference]: With dead ends: 12817 [2021-06-05 15:50:27,299 INFO L226 Difference]: Without dead ends: 12737 [2021-06-05 15:50:27,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1163.0ms TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:50:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12737 states. [2021-06-05 15:50:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12737 to 9109. [2021-06-05 15:50:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9109 states, 9108 states have (on average 3.352986385595081) internal successors, (30539), 9108 states have internal predecessors, (30539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9109 states to 9109 states and 30539 transitions. [2021-06-05 15:50:27,454 INFO L78 Accepts]: Start accepts. Automaton has 9109 states and 30539 transitions. Word has length 34 [2021-06-05 15:50:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:27,454 INFO L482 AbstractCegarLoop]: Abstraction has 9109 states and 30539 transitions. [2021-06-05 15:50:27,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 9109 states and 30539 transitions. [2021-06-05 15:50:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:27,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:27,464 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:27,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 15:50:27,665 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:27,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1116590339, now seen corresponding path program 51 times [2021-06-05 15:50:27,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:27,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361301816] [2021-06-05 15:50:27,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:27,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:27,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361301816] [2021-06-05 15:50:27,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361301816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:27,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670236542] [2021-06-05 15:50:27,910 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 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 [2021-06-05 15:50:27,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:50:27,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:27,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:50:27,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:28,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670236542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:28,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:28,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 15:50:28,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591417256] [2021-06-05 15:50:28,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:28,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:28,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:28,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:28,477 INFO L87 Difference]: Start difference. First operand 9109 states and 30539 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:30,472 INFO L93 Difference]: Finished difference Result 16652 states and 54193 transitions. [2021-06-05 15:50:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:50:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:30,498 INFO L225 Difference]: With dead ends: 16652 [2021-06-05 15:50:30,498 INFO L226 Difference]: Without dead ends: 16578 [2021-06-05 15:50:30,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1501.0ms TimeCoverageRelationStatistics Valid=527, Invalid=3013, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:50:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16578 states. [2021-06-05 15:50:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16578 to 9297. [2021-06-05 15:50:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9297 states, 9296 states have (on average 3.3570352839931155) internal successors, (31207), 9296 states have internal predecessors, (31207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 31207 transitions. [2021-06-05 15:50:30,686 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 31207 transitions. Word has length 34 [2021-06-05 15:50:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:30,686 INFO L482 AbstractCegarLoop]: Abstraction has 9297 states and 31207 transitions. [2021-06-05 15:50:30,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 31207 transitions. [2021-06-05 15:50:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:30,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:30,696 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:30,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:30,896 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash -115508009, now seen corresponding path program 52 times [2021-06-05 15:50:30,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:30,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040564768] [2021-06-05 15:50:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:31,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:31,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040564768] [2021-06-05 15:50:31,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040564768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:31,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832166714] [2021-06-05 15:50:31,083 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 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 [2021-06-05 15:50:31,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:50:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:31,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:50:31,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:31,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832166714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:31,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:31,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:50:31,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695284177] [2021-06-05 15:50:31,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:31,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:31,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:31,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:31,608 INFO L87 Difference]: Start difference. First operand 9297 states and 31207 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:33,420 INFO L93 Difference]: Finished difference Result 16129 states and 53347 transitions. [2021-06-05 15:50:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:50:33,421 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:33,449 INFO L225 Difference]: With dead ends: 16129 [2021-06-05 15:50:33,449 INFO L226 Difference]: Without dead ends: 16049 [2021-06-05 15:50:33,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1318.1ms TimeCoverageRelationStatistics Valid=561, Invalid=2745, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:50:33,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16049 states. [2021-06-05 15:50:33,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16049 to 9301. [2021-06-05 15:50:33,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9301 states, 9300 states have (on average 3.3568817204301076) internal successors, (31219), 9300 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9301 states to 9301 states and 31219 transitions. [2021-06-05 15:50:33,636 INFO L78 Accepts]: Start accepts. Automaton has 9301 states and 31219 transitions. Word has length 34 [2021-06-05 15:50:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:33,636 INFO L482 AbstractCegarLoop]: Abstraction has 9301 states and 31219 transitions. [2021-06-05 15:50:33,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 9301 states and 31219 transitions. [2021-06-05 15:50:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:33,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:33,647 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:33,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 15:50:33,848 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:33,848 INFO L82 PathProgramCache]: Analyzing trace with hash -185618045, now seen corresponding path program 53 times [2021-06-05 15:50:33,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:33,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629230161] [2021-06-05 15:50:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:34,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:34,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629230161] [2021-06-05 15:50:34,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629230161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:34,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658132108] [2021-06-05 15:50:34,051 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 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 [2021-06-05 15:50:34,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:50:34,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:34,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:50:34,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:34,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658132108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:34,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:34,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:50:34,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100841638] [2021-06-05 15:50:34,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:34,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:34,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:34,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:34,595 INFO L87 Difference]: Start difference. First operand 9301 states and 31219 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:35,997 INFO L93 Difference]: Finished difference Result 15319 states and 50920 transitions. [2021-06-05 15:50:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:50:35,998 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:36,023 INFO L225 Difference]: With dead ends: 15319 [2021-06-05 15:50:36,023 INFO L226 Difference]: Without dead ends: 15239 [2021-06-05 15:50:36,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1269.9ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:50:36,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15239 states. [2021-06-05 15:50:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15239 to 9301. [2021-06-05 15:50:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9301 states, 9300 states have (on average 3.3568817204301076) internal successors, (31219), 9300 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9301 states to 9301 states and 31219 transitions. [2021-06-05 15:50:36,207 INFO L78 Accepts]: Start accepts. Automaton has 9301 states and 31219 transitions. Word has length 34 [2021-06-05 15:50:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:36,207 INFO L482 AbstractCegarLoop]: Abstraction has 9301 states and 31219 transitions. [2021-06-05 15:50:36,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 9301 states and 31219 transitions. [2021-06-05 15:50:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:36,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:36,218 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:36,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:36,419 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1295254335, now seen corresponding path program 54 times [2021-06-05 15:50:36,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:36,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924341771] [2021-06-05 15:50:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:36,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:36,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924341771] [2021-06-05 15:50:36,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924341771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:36,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503109709] [2021-06-05 15:50:36,660 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 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 [2021-06-05 15:50:36,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:50:36,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:36,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:50:36,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:37,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503109709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:37,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:37,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 15:50:37,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227977892] [2021-06-05 15:50:37,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:37,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:37,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:37,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:37,191 INFO L87 Difference]: Start difference. First operand 9301 states and 31219 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:39,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:39,106 INFO L93 Difference]: Finished difference Result 19306 states and 63066 transitions. [2021-06-05 15:50:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:50:39,106 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:39,138 INFO L225 Difference]: With dead ends: 19306 [2021-06-05 15:50:39,138 INFO L226 Difference]: Without dead ends: 19208 [2021-06-05 15:50:39,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1534.5ms TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:50:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19208 states. [2021-06-05 15:50:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19208 to 9199. [2021-06-05 15:50:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9199 states, 9198 states have (on average 3.352576647097195) internal successors, (30837), 9198 states have internal predecessors, (30837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9199 states to 9199 states and 30837 transitions. [2021-06-05 15:50:39,353 INFO L78 Accepts]: Start accepts. Automaton has 9199 states and 30837 transitions. Word has length 34 [2021-06-05 15:50:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:39,353 INFO L482 AbstractCegarLoop]: Abstraction has 9199 states and 30837 transitions. [2021-06-05 15:50:39,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9199 states and 30837 transitions. [2021-06-05 15:50:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:39,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:39,363 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:39,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 15:50:39,564 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:39,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:39,564 INFO L82 PathProgramCache]: Analyzing trace with hash -523955581, now seen corresponding path program 55 times [2021-06-05 15:50:39,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:39,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664515729] [2021-06-05 15:50:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:39,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:39,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664515729] [2021-06-05 15:50:39,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664515729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:39,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429701886] [2021-06-05 15:50:39,762 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 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 [2021-06-05 15:50:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:39,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:50:39,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:40,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429701886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:40,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:40,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:50:40,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438497094] [2021-06-05 15:50:40,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:50:40,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:40,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:50:40,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:50:40,341 INFO L87 Difference]: Start difference. First operand 9199 states and 30837 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:41,908 INFO L93 Difference]: Finished difference Result 14838 states and 49288 transitions. [2021-06-05 15:50:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:50:41,908 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:41,932 INFO L225 Difference]: With dead ends: 14838 [2021-06-05 15:50:41,932 INFO L226 Difference]: Without dead ends: 14758 [2021-06-05 15:50:41,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1292.2ms TimeCoverageRelationStatistics Valid=542, Invalid=2538, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:50:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14758 states. [2021-06-05 15:50:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14758 to 9199. [2021-06-05 15:50:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9199 states, 9198 states have (on average 3.352576647097195) internal successors, (30837), 9198 states have internal predecessors, (30837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9199 states to 9199 states and 30837 transitions. [2021-06-05 15:50:42,104 INFO L78 Accepts]: Start accepts. Automaton has 9199 states and 30837 transitions. Word has length 34 [2021-06-05 15:50:42,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:42,104 INFO L482 AbstractCegarLoop]: Abstraction has 9199 states and 30837 transitions. [2021-06-05 15:50:42,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 9199 states and 30837 transitions. [2021-06-05 15:50:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:50:42,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:42,115 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:42,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 15:50:42,315 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:42,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:42,315 INFO L82 PathProgramCache]: Analyzing trace with hash -88435649, now seen corresponding path program 56 times [2021-06-05 15:50:42,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:42,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520461771] [2021-06-05 15:50:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:42,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520461771] [2021-06-05 15:50:42,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520461771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754442546] [2021-06-05 15:50:42,533 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 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 [2021-06-05 15:50:42,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:50:42,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:42,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:50:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:43,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754442546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:43,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:43,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 15:50:43,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814299320] [2021-06-05 15:50:43,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:50:43,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:43,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:50:43,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:43,066 INFO L87 Difference]: Start difference. First operand 9199 states and 30837 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:44,769 INFO L93 Difference]: Finished difference Result 19992 states and 66552 transitions. [2021-06-05 15:50:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:50:44,770 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-06-05 15:50:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:44,803 INFO L225 Difference]: With dead ends: 19992 [2021-06-05 15:50:44,803 INFO L226 Difference]: Without dead ends: 19912 [2021-06-05 15:50:44,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1444.2ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:50:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19912 states. [2021-06-05 15:50:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19912 to 9055. [2021-06-05 15:50:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9055 states, 9054 states have (on average 3.3537662911420365) internal successors, (30365), 9054 states have internal predecessors, (30365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9055 states to 9055 states and 30365 transitions. [2021-06-05 15:50:45,030 INFO L78 Accepts]: Start accepts. Automaton has 9055 states and 30365 transitions. Word has length 34 [2021-06-05 15:50:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:45,030 INFO L482 AbstractCegarLoop]: Abstraction has 9055 states and 30365 transitions. [2021-06-05 15:50:45,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 9055 states and 30365 transitions. [2021-06-05 15:50:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:50:45,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:45,041 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:45,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:45,242 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:45,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:45,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1561626779, now seen corresponding path program 57 times [2021-06-05 15:50:45,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:45,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675487164] [2021-06-05 15:50:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:50:45,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:45,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675487164] [2021-06-05 15:50:45,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675487164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:45,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122601564] [2021-06-05 15:50:45,663 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 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 [2021-06-05 15:50:45,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:50:45,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:50:45,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:46,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122601564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:46,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:46,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:50:46,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951041190] [2021-06-05 15:50:46,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:50:46,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:46,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:50:46,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:50:46,363 INFO L87 Difference]: Start difference. First operand 9055 states and 30365 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:48,609 INFO L93 Difference]: Finished difference Result 12463 states and 40678 transitions. [2021-06-05 15:50:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:50:48,609 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:50:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:48,624 INFO L225 Difference]: With dead ends: 12463 [2021-06-05 15:50:48,624 INFO L226 Difference]: Without dead ends: 12343 [2021-06-05 15:50:48,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 2005.9ms TimeCoverageRelationStatistics Valid=578, Invalid=3082, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:50:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12343 states. [2021-06-05 15:50:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12343 to 9161. [2021-06-05 15:50:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9161 states, 9160 states have (on average 3.3498908296943233) internal successors, (30685), 9160 states have internal predecessors, (30685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9161 states to 9161 states and 30685 transitions. [2021-06-05 15:50:48,778 INFO L78 Accepts]: Start accepts. Automaton has 9161 states and 30685 transitions. Word has length 36 [2021-06-05 15:50:48,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:48,778 INFO L482 AbstractCegarLoop]: Abstraction has 9161 states and 30685 transitions. [2021-06-05 15:50:48,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:48,778 INFO L276 IsEmpty]: Start isEmpty. Operand 9161 states and 30685 transitions. [2021-06-05 15:50:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:50:48,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:48,789 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:49,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-05 15:50:49,005 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:49,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1895413349, now seen corresponding path program 58 times [2021-06-05 15:50:49,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:49,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662273073] [2021-06-05 15:50:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:50:49,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:49,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662273073] [2021-06-05 15:50:49,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662273073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:49,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737022750] [2021-06-05 15:50:49,374 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 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 [2021-06-05 15:50:49,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:50:49,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:50:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:50,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737022750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:50,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:50,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:50:50,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169258409] [2021-06-05 15:50:50,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:50:50,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:50,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:50:50,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:50:50,170 INFO L87 Difference]: Start difference. First operand 9161 states and 30685 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:51,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:51,693 INFO L93 Difference]: Finished difference Result 9978 states and 32867 transitions. [2021-06-05 15:50:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:50:51,693 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:50:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:51,707 INFO L225 Difference]: With dead ends: 9978 [2021-06-05 15:50:51,707 INFO L226 Difference]: Without dead ends: 9870 [2021-06-05 15:50:51,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1734.8ms TimeCoverageRelationStatistics Valid=600, Invalid=2706, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:50:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2021-06-05 15:50:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 9245. [2021-06-05 15:50:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9245 states, 9244 states have (on average 3.3443314582431847) internal successors, (30915), 9244 states have internal predecessors, (30915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9245 states to 9245 states and 30915 transitions. [2021-06-05 15:50:51,840 INFO L78 Accepts]: Start accepts. Automaton has 9245 states and 30915 transitions. Word has length 36 [2021-06-05 15:50:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:51,840 INFO L482 AbstractCegarLoop]: Abstraction has 9245 states and 30915 transitions. [2021-06-05 15:50:51,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 9245 states and 30915 transitions. [2021-06-05 15:50:51,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:50:51,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:51,851 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:52,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:52,051 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:52,052 INFO L82 PathProgramCache]: Analyzing trace with hash 834811493, now seen corresponding path program 59 times [2021-06-05 15:50:52,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:52,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858747499] [2021-06-05 15:50:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:50:52,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:52,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858747499] [2021-06-05 15:50:52,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858747499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:52,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52402714] [2021-06-05 15:50:52,358 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 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 [2021-06-05 15:50:52,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:50:52,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:50:52,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:52,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52402714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:52,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:52,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 15:50:52,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108234936] [2021-06-05 15:50:52,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:50:52,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:52,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:50:52,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:50:52,991 INFO L87 Difference]: Start difference. First operand 9245 states and 30915 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:54,289 INFO L93 Difference]: Finished difference Result 11017 states and 36070 transitions. [2021-06-05 15:50:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:50:54,290 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:50:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:54,305 INFO L225 Difference]: With dead ends: 11017 [2021-06-05 15:50:54,305 INFO L226 Difference]: Without dead ends: 10963 [2021-06-05 15:50:54,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1529.0ms TimeCoverageRelationStatistics Valid=519, Invalid=2451, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:50:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10963 states. [2021-06-05 15:50:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10963 to 9313. [2021-06-05 15:50:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9313 states, 9312 states have (on average 3.3385953608247423) internal successors, (31089), 9312 states have internal predecessors, (31089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9313 states to 9313 states and 31089 transitions. [2021-06-05 15:50:54,442 INFO L78 Accepts]: Start accepts. Automaton has 9313 states and 31089 transitions. Word has length 36 [2021-06-05 15:50:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:54,442 INFO L482 AbstractCegarLoop]: Abstraction has 9313 states and 31089 transitions. [2021-06-05 15:50:54,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9313 states and 31089 transitions. [2021-06-05 15:50:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:50:54,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:54,453 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:54,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-05 15:50:54,657 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash -3115675, now seen corresponding path program 60 times [2021-06-05 15:50:54,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:54,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920894971] [2021-06-05 15:50:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:50:54,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:54,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920894971] [2021-06-05 15:50:54,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920894971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:54,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727559431] [2021-06-05 15:50:54,875 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 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 [2021-06-05 15:50:54,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:50:54,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:54,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:50:54,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:55,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727559431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:55,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:55,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:50:55,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153353024] [2021-06-05 15:50:55,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:50:55,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:55,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:50:55,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:50:55,446 INFO L87 Difference]: Start difference. First operand 9313 states and 31089 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:57,686 INFO L93 Difference]: Finished difference Result 10574 states and 34626 transitions. [2021-06-05 15:50:57,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:50:57,687 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:50:57,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:57,701 INFO L225 Difference]: With dead ends: 10574 [2021-06-05 15:50:57,701 INFO L226 Difference]: Without dead ends: 10293 [2021-06-05 15:50:57,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1798.9ms TimeCoverageRelationStatistics Valid=556, Invalid=3604, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:50:57,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10293 states. [2021-06-05 15:50:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10293 to 9327. [2021-06-05 15:50:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9327 states, 9326 states have (on average 3.3374437057688184) internal successors, (31125), 9326 states have internal predecessors, (31125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9327 states to 9327 states and 31125 transitions. [2021-06-05 15:50:57,843 INFO L78 Accepts]: Start accepts. Automaton has 9327 states and 31125 transitions. Word has length 36 [2021-06-05 15:50:57,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:57,843 INFO L482 AbstractCegarLoop]: Abstraction has 9327 states and 31125 transitions. [2021-06-05 15:50:57,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand 9327 states and 31125 transitions. [2021-06-05 15:50:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:50:57,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:57,854 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:58,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:58,054 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:58,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:58,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1558016609, now seen corresponding path program 61 times [2021-06-05 15:50:58,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:58,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18878550] [2021-06-05 15:50:58,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:58,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:58,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18878550] [2021-06-05 15:50:58,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18878550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:58,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404785301] [2021-06-05 15:50:58,359 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 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 [2021-06-05 15:50:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:58,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:50:58,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:59,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404785301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:59,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:59,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:50:59,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641028126] [2021-06-05 15:50:59,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:50:59,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:50:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:50:59,211 INFO L87 Difference]: Start difference. First operand 9327 states and 31125 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:01,018 INFO L93 Difference]: Finished difference Result 10820 states and 35312 transitions. [2021-06-05 15:51:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:51:01,019 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:01,035 INFO L225 Difference]: With dead ends: 10820 [2021-06-05 15:51:01,035 INFO L226 Difference]: Without dead ends: 10712 [2021-06-05 15:51:01,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 2010.4ms TimeCoverageRelationStatistics Valid=755, Invalid=3535, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:51:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10712 states. [2021-06-05 15:51:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10712 to 9391. [2021-06-05 15:51:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9391 states, 9390 states have (on average 3.3338658146964857) internal successors, (31305), 9390 states have internal predecessors, (31305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9391 states to 9391 states and 31305 transitions. [2021-06-05 15:51:01,187 INFO L78 Accepts]: Start accepts. Automaton has 9391 states and 31305 transitions. Word has length 36 [2021-06-05 15:51:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:01,187 INFO L482 AbstractCegarLoop]: Abstraction has 9391 states and 31305 transitions. [2021-06-05 15:51:01,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 9391 states and 31305 transitions. [2021-06-05 15:51:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:01,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:01,198 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:01,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 15:51:01,399 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:01,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:01,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1212016539, now seen corresponding path program 62 times [2021-06-05 15:51:01,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:01,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596715954] [2021-06-05 15:51:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:01,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:01,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596715954] [2021-06-05 15:51:01,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596715954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:01,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555299882] [2021-06-05 15:51:01,720 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 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 [2021-06-05 15:51:01,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:51:01,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:01,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:51:01,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:02,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555299882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:02,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:02,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 15:51:02,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691048920] [2021-06-05 15:51:02,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:51:02,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:51:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:51:02,503 INFO L87 Difference]: Start difference. First operand 9391 states and 31305 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:06,488 INFO L93 Difference]: Finished difference Result 15459 states and 49301 transitions. [2021-06-05 15:51:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 15:51:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:06,511 INFO L225 Difference]: With dead ends: 15459 [2021-06-05 15:51:06,511 INFO L226 Difference]: Without dead ends: 15318 [2021-06-05 15:51:06,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 3269.5ms TimeCoverageRelationStatistics Valid=1225, Invalid=6607, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 15:51:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15318 states. [2021-06-05 15:51:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15318 to 9405. [2021-06-05 15:51:06,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9405 states, 9404 states have (on average 3.336771586558911) internal successors, (31379), 9404 states have internal predecessors, (31379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9405 states to 9405 states and 31379 transitions. [2021-06-05 15:51:06,677 INFO L78 Accepts]: Start accepts. Automaton has 9405 states and 31379 transitions. Word has length 36 [2021-06-05 15:51:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:06,677 INFO L482 AbstractCegarLoop]: Abstraction has 9405 states and 31379 transitions. [2021-06-05 15:51:06,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 9405 states and 31379 transitions. [2021-06-05 15:51:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:06,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:06,688 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:06,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 15:51:06,889 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:06,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1194156385, now seen corresponding path program 63 times [2021-06-05 15:51:06,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:06,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879201811] [2021-06-05 15:51:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:07,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:07,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879201811] [2021-06-05 15:51:07,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879201811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:07,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851099392] [2021-06-05 15:51:07,196 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 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 [2021-06-05 15:51:07,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:51:07,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:07,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:51:07,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:07,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851099392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:07,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:07,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:51:07,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671981625] [2021-06-05 15:51:07,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:51:07,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:07,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:51:07,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:51:07,848 INFO L87 Difference]: Start difference. First operand 9405 states and 31379 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:11,268 INFO L93 Difference]: Finished difference Result 15173 states and 48503 transitions. [2021-06-05 15:51:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:51:11,270 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:11,293 INFO L225 Difference]: With dead ends: 15173 [2021-06-05 15:51:11,294 INFO L226 Difference]: Without dead ends: 15059 [2021-06-05 15:51:11,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 2528.6ms TimeCoverageRelationStatistics Valid=822, Invalid=5184, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:51:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15059 states. [2021-06-05 15:51:11,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15059 to 9471. [2021-06-05 15:51:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9471 states, 9470 states have (on average 3.3367476240760294) internal successors, (31599), 9470 states have internal predecessors, (31599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9471 states to 9471 states and 31599 transitions. [2021-06-05 15:51:11,481 INFO L78 Accepts]: Start accepts. Automaton has 9471 states and 31599 transitions. Word has length 36 [2021-06-05 15:51:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:11,481 INFO L482 AbstractCegarLoop]: Abstraction has 9471 states and 31599 transitions. [2021-06-05 15:51:11,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 9471 states and 31599 transitions. [2021-06-05 15:51:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:11,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:11,492 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:11,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:11,693 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash 359968101, now seen corresponding path program 64 times [2021-06-05 15:51:11,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:11,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327337123] [2021-06-05 15:51:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:11,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:11,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327337123] [2021-06-05 15:51:11,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327337123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:11,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109238039] [2021-06-05 15:51:11,945 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 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 [2021-06-05 15:51:11,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:51:11,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:11,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:51:11,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:12,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109238039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:12,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:12,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:51:12,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144628764] [2021-06-05 15:51:12,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:51:12,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:51:12,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:51:12,584 INFO L87 Difference]: Start difference. First operand 9471 states and 31599 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:15,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:15,885 INFO L93 Difference]: Finished difference Result 16347 states and 51964 transitions. [2021-06-05 15:51:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 15:51:15,886 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:15,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:15,909 INFO L225 Difference]: With dead ends: 16347 [2021-06-05 15:51:15,909 INFO L226 Difference]: Without dead ends: 16075 [2021-06-05 15:51:15,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 2671.4ms TimeCoverageRelationStatistics Valid=1131, Invalid=6879, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:51:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16075 states. [2021-06-05 15:51:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16075 to 9481. [2021-06-05 15:51:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9481 states, 9480 states have (on average 3.334704641350211) internal successors, (31613), 9480 states have internal predecessors, (31613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9481 states to 9481 states and 31613 transitions. [2021-06-05 15:51:16,087 INFO L78 Accepts]: Start accepts. Automaton has 9481 states and 31613 transitions. Word has length 36 [2021-06-05 15:51:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:16,087 INFO L482 AbstractCegarLoop]: Abstraction has 9481 states and 31613 transitions. [2021-06-05 15:51:16,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:16,087 INFO L276 IsEmpty]: Start isEmpty. Operand 9481 states and 31613 transitions. [2021-06-05 15:51:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:16,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:16,098 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:16,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:16,298 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:16,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:16,299 INFO L82 PathProgramCache]: Analyzing trace with hash 663543393, now seen corresponding path program 65 times [2021-06-05 15:51:16,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:16,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833372188] [2021-06-05 15:51:16,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:16,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:16,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833372188] [2021-06-05 15:51:16,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833372188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:16,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409531844] [2021-06-05 15:51:16,564 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 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 [2021-06-05 15:51:16,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:51:16,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:16,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:51:16,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:17,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409531844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:17,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:17,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:51:17,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993138693] [2021-06-05 15:51:17,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:51:17,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:17,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:51:17,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:51:17,258 INFO L87 Difference]: Start difference. First operand 9481 states and 31613 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:21,240 INFO L93 Difference]: Finished difference Result 17046 states and 54034 transitions. [2021-06-05 15:51:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 15:51:21,241 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:21,265 INFO L225 Difference]: With dead ends: 17046 [2021-06-05 15:51:21,265 INFO L226 Difference]: Without dead ends: 16798 [2021-06-05 15:51:21,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3255 ImplicationChecksByTransitivity, 3264.3ms TimeCoverageRelationStatistics Valid=1396, Invalid=8704, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 15:51:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2021-06-05 15:51:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 9516. [2021-06-05 15:51:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 9515 states have (on average 3.333893851812927) internal successors, (31722), 9515 states have internal predecessors, (31722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 31722 transitions. [2021-06-05 15:51:21,445 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 31722 transitions. Word has length 36 [2021-06-05 15:51:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:21,445 INFO L482 AbstractCegarLoop]: Abstraction has 9516 states and 31722 transitions. [2021-06-05 15:51:21,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 31722 transitions. [2021-06-05 15:51:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:21,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:21,456 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:21,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 15:51:21,656 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1447477403, now seen corresponding path program 66 times [2021-06-05 15:51:21,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:21,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447927157] [2021-06-05 15:51:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:21,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:21,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447927157] [2021-06-05 15:51:21,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447927157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:21,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112851842] [2021-06-05 15:51:21,977 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 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 [2021-06-05 15:51:22,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:51:22,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:22,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:51:22,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:22,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112851842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:22,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:22,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:51:22,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920820699] [2021-06-05 15:51:22,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:51:22,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:22,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:51:22,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:51:22,551 INFO L87 Difference]: Start difference. First operand 9516 states and 31722 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:28,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:28,532 INFO L93 Difference]: Finished difference Result 18367 states and 57873 transitions. [2021-06-05 15:51:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 15:51:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:28,560 INFO L225 Difference]: With dead ends: 18367 [2021-06-05 15:51:28,560 INFO L226 Difference]: Without dead ends: 18184 [2021-06-05 15:51:28,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4588 ImplicationChecksByTransitivity, 4446.9ms TimeCoverageRelationStatistics Valid=1975, Invalid=11597, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 15:51:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18184 states. [2021-06-05 15:51:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18184 to 9510. [2021-06-05 15:51:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9509 states have (on average 3.3346303501945527) internal successors, (31709), 9509 states have internal predecessors, (31709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 31709 transitions. [2021-06-05 15:51:28,820 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 31709 transitions. Word has length 36 [2021-06-05 15:51:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:28,820 INFO L482 AbstractCegarLoop]: Abstraction has 9510 states and 31709 transitions. [2021-06-05 15:51:28,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 31709 transitions. [2021-06-05 15:51:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:28,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:28,832 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:29,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 15:51:29,050 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:29,050 INFO L82 PathProgramCache]: Analyzing trace with hash -556327835, now seen corresponding path program 67 times [2021-06-05 15:51:29,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:29,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909990248] [2021-06-05 15:51:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:29,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:29,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909990248] [2021-06-05 15:51:29,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909990248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:29,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81931613] [2021-06-05 15:51:29,309 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 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 [2021-06-05 15:51:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:29,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:51:29,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:29,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81931613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:29,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:29,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:51:29,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855225180] [2021-06-05 15:51:29,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:51:29,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:29,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:51:29,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:29,961 INFO L87 Difference]: Start difference. First operand 9510 states and 31709 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:31,776 INFO L93 Difference]: Finished difference Result 13786 states and 44215 transitions. [2021-06-05 15:51:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:51:31,776 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:31,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:31,794 INFO L225 Difference]: With dead ends: 13786 [2021-06-05 15:51:31,794 INFO L226 Difference]: Without dead ends: 13622 [2021-06-05 15:51:31,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 1804.1ms TimeCoverageRelationStatistics Valid=755, Invalid=3801, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:51:31,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-06-05 15:51:31,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 9502. [2021-06-05 15:51:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 9501 states have (on average 3.335333122829176) internal successors, (31689), 9501 states have internal predecessors, (31689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:31,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 31689 transitions. [2021-06-05 15:51:31,940 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 31689 transitions. Word has length 36 [2021-06-05 15:51:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:31,940 INFO L482 AbstractCegarLoop]: Abstraction has 9502 states and 31689 transitions. [2021-06-05 15:51:31,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 31689 transitions. [2021-06-05 15:51:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:31,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:31,951 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:32,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:32,152 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash -684298399, now seen corresponding path program 68 times [2021-06-05 15:51:32,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:32,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845379092] [2021-06-05 15:51:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:32,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:32,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845379092] [2021-06-05 15:51:32,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845379092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:32,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241787173] [2021-06-05 15:51:32,379 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 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 [2021-06-05 15:51:32,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:51:32,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:32,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:51:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:32,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241787173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:32,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:32,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:51:32,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835693965] [2021-06-05 15:51:32,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:51:32,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:32,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:51:32,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:51:32,943 INFO L87 Difference]: Start difference. First operand 9502 states and 31689 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:37,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:37,910 INFO L93 Difference]: Finished difference Result 14876 states and 47515 transitions. [2021-06-05 15:51:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 15:51:37,911 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:37,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:37,934 INFO L225 Difference]: With dead ends: 14876 [2021-06-05 15:51:37,934 INFO L226 Difference]: Without dead ends: 14655 [2021-06-05 15:51:37,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 3462.0ms TimeCoverageRelationStatistics Valid=1075, Invalid=8627, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 15:51:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14655 states. [2021-06-05 15:51:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14655 to 9510. [2021-06-05 15:51:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9509 states have (on average 3.338416237248922) internal successors, (31745), 9509 states have internal predecessors, (31745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 31745 transitions. [2021-06-05 15:51:38,101 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 31745 transitions. Word has length 36 [2021-06-05 15:51:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:38,102 INFO L482 AbstractCegarLoop]: Abstraction has 9510 states and 31745 transitions. [2021-06-05 15:51:38,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 31745 transitions. [2021-06-05 15:51:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:38,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:38,113 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:38,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 15:51:38,314 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:38,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:38,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2051584159, now seen corresponding path program 69 times [2021-06-05 15:51:38,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:38,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042959088] [2021-06-05 15:51:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:38,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042959088] [2021-06-05 15:51:38,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042959088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816099470] [2021-06-05 15:51:38,643 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 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 [2021-06-05 15:51:38,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:51:38,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:38,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:51:38,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:39,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816099470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:39,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:39,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:51:39,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898432115] [2021-06-05 15:51:39,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:51:39,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:39,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:51:39,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:51:39,269 INFO L87 Difference]: Start difference. First operand 9510 states and 31745 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:42,508 INFO L93 Difference]: Finished difference Result 16123 states and 51334 transitions. [2021-06-05 15:51:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:51:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:42,532 INFO L225 Difference]: With dead ends: 16123 [2021-06-05 15:51:42,532 INFO L226 Difference]: Without dead ends: 16003 [2021-06-05 15:51:42,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 2714.4ms TimeCoverageRelationStatistics Valid=1070, Invalid=5410, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:51:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16003 states. [2021-06-05 15:51:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16003 to 9524. [2021-06-05 15:51:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3400189016066366) internal successors, (31807), 9523 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31807 transitions. [2021-06-05 15:51:42,699 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31807 transitions. Word has length 36 [2021-06-05 15:51:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:42,699 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31807 transitions. [2021-06-05 15:51:42,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31807 transitions. [2021-06-05 15:51:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:42,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:42,711 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:42,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:42,911 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:42,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:42,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1744269983, now seen corresponding path program 70 times [2021-06-05 15:51:42,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:42,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812013654] [2021-06-05 15:51:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:43,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812013654] [2021-06-05 15:51:43,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812013654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795065470] [2021-06-05 15:51:43,147 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 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 [2021-06-05 15:51:43,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:51:43,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:43,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:51:43,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:43,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795065470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:43,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:43,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:51:43,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241345374] [2021-06-05 15:51:43,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:51:43,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:43,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:51:43,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:43,807 INFO L87 Difference]: Start difference. First operand 9524 states and 31807 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:48,414 INFO L93 Difference]: Finished difference Result 18630 states and 58802 transitions. [2021-06-05 15:51:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 15:51:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:48,442 INFO L225 Difference]: With dead ends: 18630 [2021-06-05 15:51:48,442 INFO L226 Difference]: Without dead ends: 18458 [2021-06-05 15:51:48,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 3447.1ms TimeCoverageRelationStatistics Valid=1708, Invalid=8392, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 15:51:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18458 states. [2021-06-05 15:51:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18458 to 9524. [2021-06-05 15:51:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3400189016066366) internal successors, (31807), 9523 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31807 transitions. [2021-06-05 15:51:48,652 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31807 transitions. Word has length 36 [2021-06-05 15:51:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:48,652 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31807 transitions. [2021-06-05 15:51:48,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31807 transitions. [2021-06-05 15:51:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:48,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:48,663 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:48,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 15:51:48,865 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1544243469, now seen corresponding path program 71 times [2021-06-05 15:51:48,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:48,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704467315] [2021-06-05 15:51:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:49,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:49,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704467315] [2021-06-05 15:51:49,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704467315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:49,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672389995] [2021-06-05 15:51:49,232 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 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 [2021-06-05 15:51:49,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:51:49,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:49,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:51:49,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:49,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672389995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:49,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:49,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:51:49,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595287141] [2021-06-05 15:51:49,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:51:49,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:51:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:51:49,943 INFO L87 Difference]: Start difference. First operand 9524 states and 31807 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:51,041 INFO L93 Difference]: Finished difference Result 10252 states and 33744 transitions. [2021-06-05 15:51:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:51:51,041 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:51,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:51,057 INFO L225 Difference]: With dead ends: 10252 [2021-06-05 15:51:51,057 INFO L226 Difference]: Without dead ends: 10198 [2021-06-05 15:51:51,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1406.1ms TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:51:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10198 states. [2021-06-05 15:51:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10198 to 9524. [2021-06-05 15:51:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3421190801218104) internal successors, (31827), 9523 states have internal predecessors, (31827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31827 transitions. [2021-06-05 15:51:51,204 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31827 transitions. Word has length 36 [2021-06-05 15:51:51,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:51,204 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31827 transitions. [2021-06-05 15:51:51,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31827 transitions. [2021-06-05 15:51:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:51,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:51,215 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:51,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-06-05 15:51:51,416 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:51,416 INFO L82 PathProgramCache]: Analyzing trace with hash -354285555, now seen corresponding path program 72 times [2021-06-05 15:51:51,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:51,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419789554] [2021-06-05 15:51:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:51,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:51,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419789554] [2021-06-05 15:51:51,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419789554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:51,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657863523] [2021-06-05 15:51:51,776 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 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 [2021-06-05 15:51:51,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:51:51,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:51,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:51:51,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:52,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657863523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:52,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:52,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:51:52,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355649146] [2021-06-05 15:51:52,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:51:52,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:52,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:51:52,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:51:52,471 INFO L87 Difference]: Start difference. First operand 9524 states and 31827 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:54,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:54,195 INFO L93 Difference]: Finished difference Result 10196 states and 33634 transitions. [2021-06-05 15:51:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:51:54,195 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:54,211 INFO L225 Difference]: With dead ends: 10196 [2021-06-05 15:51:54,211 INFO L226 Difference]: Without dead ends: 10082 [2021-06-05 15:51:54,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1543.0ms TimeCoverageRelationStatistics Valid=368, Invalid=2388, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:51:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10082 states. [2021-06-05 15:51:54,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10082 to 9560. [2021-06-05 15:51:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9560 states, 9559 states have (on average 3.340830630819123) internal successors, (31935), 9559 states have internal predecessors, (31935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9560 states to 9560 states and 31935 transitions. [2021-06-05 15:51:54,395 INFO L78 Accepts]: Start accepts. Automaton has 9560 states and 31935 transitions. Word has length 36 [2021-06-05 15:51:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:54,395 INFO L482 AbstractCegarLoop]: Abstraction has 9560 states and 31935 transitions. [2021-06-05 15:51:54,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 9560 states and 31935 transitions. [2021-06-05 15:51:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:54,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:54,407 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:54,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:54,607 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:54,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1192212723, now seen corresponding path program 73 times [2021-06-05 15:51:54,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:54,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306607218] [2021-06-05 15:51:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:54,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:54,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306607218] [2021-06-05 15:51:54,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306607218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:54,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274537944] [2021-06-05 15:51:54,836 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 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 [2021-06-05 15:51:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:51:54,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:55,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274537944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:55,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:55,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:51:55,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580745390] [2021-06-05 15:51:55,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:51:55,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:55,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:51:55,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:55,445 INFO L87 Difference]: Start difference. First operand 9560 states and 31935 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:56,893 INFO L93 Difference]: Finished difference Result 10336 states and 34015 transitions. [2021-06-05 15:51:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:51:56,893 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:51:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:56,909 INFO L225 Difference]: With dead ends: 10336 [2021-06-05 15:51:56,909 INFO L226 Difference]: Without dead ends: 10156 [2021-06-05 15:51:56,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1370.1ms TimeCoverageRelationStatistics Valid=466, Invalid=2726, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:51:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10156 states. [2021-06-05 15:51:57,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10156 to 9528. [2021-06-05 15:51:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9528 states, 9527 states have (on average 3.3432350162695497) internal successors, (31851), 9527 states have internal predecessors, (31851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9528 states to 9528 states and 31851 transitions. [2021-06-05 15:51:57,100 INFO L78 Accepts]: Start accepts. Automaton has 9528 states and 31851 transitions. Word has length 36 [2021-06-05 15:51:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:57,100 INFO L482 AbstractCegarLoop]: Abstraction has 9528 states and 31851 transitions. [2021-06-05 15:51:57,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:57,100 INFO L276 IsEmpty]: Start isEmpty. Operand 9528 states and 31851 transitions. [2021-06-05 15:51:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:51:57,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:57,111 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:57,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:57,312 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:57,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:57,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1547403025, now seen corresponding path program 74 times [2021-06-05 15:51:57,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:57,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786421147] [2021-06-05 15:51:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:57,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:57,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786421147] [2021-06-05 15:51:57,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786421147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:57,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103569065] [2021-06-05 15:51:57,674 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 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 [2021-06-05 15:51:57,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:51:57,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:57,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:51:57,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:58,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103569065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:58,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:58,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 15:51:58,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272935839] [2021-06-05 15:51:58,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:51:58,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:58,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:51:58,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:51:58,382 INFO L87 Difference]: Start difference. First operand 9528 states and 31851 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:01,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:01,784 INFO L93 Difference]: Finished difference Result 13472 states and 43399 transitions. [2021-06-05 15:52:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:52:01,784 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:01,806 INFO L225 Difference]: With dead ends: 13472 [2021-06-05 15:52:01,806 INFO L226 Difference]: Without dead ends: 13358 [2021-06-05 15:52:01,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 2605.9ms TimeCoverageRelationStatistics Valid=799, Invalid=5207, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:52:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13358 states. [2021-06-05 15:52:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13358 to 9512. [2021-06-05 15:52:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9512 states, 9511 states have (on average 3.344232993376091) internal successors, (31807), 9511 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9512 states to 9512 states and 31807 transitions. [2021-06-05 15:52:01,969 INFO L78 Accepts]: Start accepts. Automaton has 9512 states and 31807 transitions. Word has length 36 [2021-06-05 15:52:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:01,969 INFO L482 AbstractCegarLoop]: Abstraction has 9512 states and 31807 transitions. [2021-06-05 15:52:01,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 9512 states and 31807 transitions. [2021-06-05 15:52:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:01,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:01,980 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:02,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:02,181 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:02,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1312007693, now seen corresponding path program 75 times [2021-06-05 15:52:02,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:02,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438051586] [2021-06-05 15:52:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:02,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438051586] [2021-06-05 15:52:02,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438051586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788830758] [2021-06-05 15:52:02,532 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 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 [2021-06-05 15:52:02,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:52:02,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:02,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:52:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:03,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788830758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:03,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:03,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-06-05 15:52:03,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580971893] [2021-06-05 15:52:03,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:52:03,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:03,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:52:03,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:52:03,266 INFO L87 Difference]: Start difference. First operand 9512 states and 31807 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:07,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:07,540 INFO L93 Difference]: Finished difference Result 16362 states and 52136 transitions. [2021-06-05 15:52:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 15:52:07,541 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:07,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:07,565 INFO L225 Difference]: With dead ends: 16362 [2021-06-05 15:52:07,565 INFO L226 Difference]: Without dead ends: 16221 [2021-06-05 15:52:07,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2905 ImplicationChecksByTransitivity, 3542.9ms TimeCoverageRelationStatistics Valid=1441, Invalid=7489, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 15:52:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16221 states. [2021-06-05 15:52:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16221 to 9564. [2021-06-05 15:52:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9564 states, 9563 states have (on average 3.3460211230785317) internal successors, (31998), 9563 states have internal predecessors, (31998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9564 states to 9564 states and 31998 transitions. [2021-06-05 15:52:07,743 INFO L78 Accepts]: Start accepts. Automaton has 9564 states and 31998 transitions. Word has length 36 [2021-06-05 15:52:07,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:07,743 INFO L482 AbstractCegarLoop]: Abstraction has 9564 states and 31998 transitions. [2021-06-05 15:52:07,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:07,744 INFO L276 IsEmpty]: Start isEmpty. Operand 9564 states and 31998 transitions. [2021-06-05 15:52:07,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:07,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:07,755 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:07,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-06-05 15:52:07,955 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:07,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:07,955 INFO L82 PathProgramCache]: Analyzing trace with hash 776721425, now seen corresponding path program 76 times [2021-06-05 15:52:07,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:07,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828646837] [2021-06-05 15:52:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:08,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:08,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828646837] [2021-06-05 15:52:08,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828646837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:08,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170464140] [2021-06-05 15:52:08,198 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 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 [2021-06-05 15:52:08,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:52:08,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:08,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:52:08,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:08,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170464140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:08,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:08,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:52:08,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103661261] [2021-06-05 15:52:08,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:08,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:08,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:08,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:08,819 INFO L87 Difference]: Start difference. First operand 9564 states and 31998 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:10,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:10,864 INFO L93 Difference]: Finished difference Result 14020 states and 45032 transitions. [2021-06-05 15:52:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:52:10,865 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:10,885 INFO L225 Difference]: With dead ends: 14020 [2021-06-05 15:52:10,885 INFO L226 Difference]: Without dead ends: 13808 [2021-06-05 15:52:10,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1868.9ms TimeCoverageRelationStatistics Valid=736, Invalid=4520, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:52:10,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13808 states. [2021-06-05 15:52:11,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13808 to 9532. [2021-06-05 15:52:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9532 states, 9531 states have (on average 3.348861609484839) internal successors, (31918), 9531 states have internal predecessors, (31918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9532 states to 9532 states and 31918 transitions. [2021-06-05 15:52:11,044 INFO L78 Accepts]: Start accepts. Automaton has 9532 states and 31918 transitions. Word has length 36 [2021-06-05 15:52:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:11,044 INFO L482 AbstractCegarLoop]: Abstraction has 9532 states and 31918 transitions. [2021-06-05 15:52:11,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 9532 states and 31918 transitions. [2021-06-05 15:52:11,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:11,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:11,055 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:11,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 15:52:11,256 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:11,256 INFO L82 PathProgramCache]: Analyzing trace with hash 454800909, now seen corresponding path program 77 times [2021-06-05 15:52:11,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:11,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714146571] [2021-06-05 15:52:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:11,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:11,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714146571] [2021-06-05 15:52:11,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714146571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:11,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410983327] [2021-06-05 15:52:11,500 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 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 [2021-06-05 15:52:11,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:52:11,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:52:11,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:12,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410983327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:12,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:12,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:52:12,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484350979] [2021-06-05 15:52:12,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:12,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:12,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:12,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:12,100 INFO L87 Difference]: Start difference. First operand 9532 states and 31918 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:14,614 INFO L93 Difference]: Finished difference Result 14454 states and 46414 transitions. [2021-06-05 15:52:14,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:52:14,615 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:14,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:14,637 INFO L225 Difference]: With dead ends: 14454 [2021-06-05 15:52:14,638 INFO L226 Difference]: Without dead ends: 14270 [2021-06-05 15:52:14,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 2106.8ms TimeCoverageRelationStatistics Valid=874, Invalid=5288, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:52:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14270 states. [2021-06-05 15:52:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14270 to 9504. [2021-06-05 15:52:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9504 states, 9503 states have (on average 3.351994107124066) internal successors, (31854), 9503 states have internal predecessors, (31854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9504 states to 9504 states and 31854 transitions. [2021-06-05 15:52:14,803 INFO L78 Accepts]: Start accepts. Automaton has 9504 states and 31854 transitions. Word has length 36 [2021-06-05 15:52:14,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:14,803 INFO L482 AbstractCegarLoop]: Abstraction has 9504 states and 31854 transitions. [2021-06-05 15:52:14,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 9504 states and 31854 transitions. [2021-06-05 15:52:14,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:14,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:14,815 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:15,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:15,015 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:15,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1194222865, now seen corresponding path program 78 times [2021-06-05 15:52:15,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:15,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282955958] [2021-06-05 15:52:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:15,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:15,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282955958] [2021-06-05 15:52:15,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282955958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:15,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791709097] [2021-06-05 15:52:15,257 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 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 [2021-06-05 15:52:15,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:52:15,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:15,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:52:15,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:15,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791709097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:15,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:15,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:52:15,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385991474] [2021-06-05 15:52:15,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:52:15,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:15,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:52:15,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:52:15,818 INFO L87 Difference]: Start difference. First operand 9504 states and 31854 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:20,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:20,791 INFO L93 Difference]: Finished difference Result 16078 states and 51312 transitions. [2021-06-05 15:52:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 15:52:20,792 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:20,813 INFO L225 Difference]: With dead ends: 16078 [2021-06-05 15:52:20,813 INFO L226 Difference]: Without dead ends: 15779 [2021-06-05 15:52:20,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3988 ImplicationChecksByTransitivity, 3712.7ms TimeCoverageRelationStatistics Valid=1235, Invalid=10537, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 15:52:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15779 states. [2021-06-05 15:52:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15779 to 9476. [2021-06-05 15:52:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 9475 states have (on average 3.35155672823219) internal successors, (31756), 9475 states have internal predecessors, (31756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 31756 transitions. [2021-06-05 15:52:20,984 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 31756 transitions. Word has length 36 [2021-06-05 15:52:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:20,984 INFO L482 AbstractCegarLoop]: Abstraction has 9476 states and 31756 transitions. [2021-06-05 15:52:20,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 31756 transitions. [2021-06-05 15:52:20,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:20,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:20,996 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:21,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-06-05 15:52:21,196 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:21,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2099893235, now seen corresponding path program 79 times [2021-06-05 15:52:21,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:21,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642159571] [2021-06-05 15:52:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:21,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:21,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642159571] [2021-06-05 15:52:21,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642159571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:21,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104061376] [2021-06-05 15:52:21,469 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 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 [2021-06-05 15:52:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:21,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:52:21,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:22,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104061376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:22,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:22,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-06-05 15:52:22,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650022864] [2021-06-05 15:52:22,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:52:22,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:22,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:52:22,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:52:22,139 INFO L87 Difference]: Start difference. First operand 9476 states and 31756 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:26,210 INFO L93 Difference]: Finished difference Result 16847 states and 53541 transitions. [2021-06-05 15:52:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 15:52:26,210 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:26,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:26,235 INFO L225 Difference]: With dead ends: 16847 [2021-06-05 15:52:26,235 INFO L226 Difference]: Without dead ends: 16599 [2021-06-05 15:52:26,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3253 ImplicationChecksByTransitivity, 3183.1ms TimeCoverageRelationStatistics Valid=1311, Invalid=8789, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 15:52:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16599 states. [2021-06-05 15:52:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16599 to 9476. [2021-06-05 15:52:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 9475 states have (on average 3.350817941952507) internal successors, (31749), 9475 states have internal predecessors, (31749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 31749 transitions. [2021-06-05 15:52:26,436 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 31749 transitions. Word has length 36 [2021-06-05 15:52:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:26,436 INFO L482 AbstractCegarLoop]: Abstraction has 9476 states and 31749 transitions. [2021-06-05 15:52:26,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:26,436 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 31749 transitions. [2021-06-05 15:52:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:26,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:26,447 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:26,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-05 15:52:26,648 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:26,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:26,648 INFO L82 PathProgramCache]: Analyzing trace with hash 84053265, now seen corresponding path program 80 times [2021-06-05 15:52:26,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:26,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519736561] [2021-06-05 15:52:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:26,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:26,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519736561] [2021-06-05 15:52:26,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519736561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889359234] [2021-06-05 15:52:26,906 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 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 [2021-06-05 15:52:26,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:52:26,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:26,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:52:26,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:27,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889359234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:27,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:27,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:52:27,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579995909] [2021-06-05 15:52:27,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:52:27,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:27,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:52:27,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:52:27,542 INFO L87 Difference]: Start difference. First operand 9476 states and 31749 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:32,404 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 15:52:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:33,604 INFO L93 Difference]: Finished difference Result 18120 states and 57307 transitions. [2021-06-05 15:52:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 15:52:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:33,632 INFO L225 Difference]: With dead ends: 18120 [2021-06-05 15:52:33,632 INFO L226 Difference]: Without dead ends: 17937 [2021-06-05 15:52:33,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4718 ImplicationChecksByTransitivity, 4539.8ms TimeCoverageRelationStatistics Valid=1926, Invalid=11880, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 15:52:33,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17937 states. [2021-06-05 15:52:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17937 to 9447. [2021-06-05 15:52:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9447 states, 9446 states have (on average 3.34977768367563) internal successors, (31642), 9446 states have internal predecessors, (31642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 31642 transitions. [2021-06-05 15:52:33,855 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 31642 transitions. Word has length 36 [2021-06-05 15:52:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:33,855 INFO L482 AbstractCegarLoop]: Abstraction has 9447 states and 31642 transitions. [2021-06-05 15:52:33,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 31642 transitions. [2021-06-05 15:52:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:33,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:33,867 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:34,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:34,081 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash -859968943, now seen corresponding path program 81 times [2021-06-05 15:52:34,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:34,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257921491] [2021-06-05 15:52:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:34,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:34,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257921491] [2021-06-05 15:52:34,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257921491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:34,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071324979] [2021-06-05 15:52:34,436 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 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 [2021-06-05 15:52:34,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:52:34,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:34,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:52:34,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:35,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071324979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:35,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:35,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 15:52:35,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374588979] [2021-06-05 15:52:35,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:52:35,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:35,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:52:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:52:35,188 INFO L87 Difference]: Start difference. First operand 9447 states and 31642 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:38,853 INFO L93 Difference]: Finished difference Result 18867 states and 60832 transitions. [2021-06-05 15:52:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 15:52:38,853 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:38,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:38,881 INFO L225 Difference]: With dead ends: 18867 [2021-06-05 15:52:38,881 INFO L226 Difference]: Without dead ends: 18741 [2021-06-05 15:52:38,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2437 ImplicationChecksByTransitivity, 3175.5ms TimeCoverageRelationStatistics Valid=1200, Invalid=6632, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 15:52:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18741 states. [2021-06-05 15:52:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18741 to 9611. [2021-06-05 15:52:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9611 states, 9610 states have (on average 3.3521331945889696) internal successors, (32214), 9610 states have internal predecessors, (32214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9611 states to 9611 states and 32214 transitions. [2021-06-05 15:52:39,081 INFO L78 Accepts]: Start accepts. Automaton has 9611 states and 32214 transitions. Word has length 36 [2021-06-05 15:52:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:39,081 INFO L482 AbstractCegarLoop]: Abstraction has 9611 states and 32214 transitions. [2021-06-05 15:52:39,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 9611 states and 32214 transitions. [2021-06-05 15:52:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:39,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:39,093 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:39,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 15:52:39,293 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1227510575, now seen corresponding path program 82 times [2021-06-05 15:52:39,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:39,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640010359] [2021-06-05 15:52:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:39,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:39,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640010359] [2021-06-05 15:52:39,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640010359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:39,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777758245] [2021-06-05 15:52:39,611 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 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 [2021-06-05 15:52:39,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:52:39,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:39,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:52:39,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:40,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777758245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:40,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:40,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:52:40,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321510170] [2021-06-05 15:52:40,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:52:40,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:40,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:52:40,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:52:40,396 INFO L87 Difference]: Start difference. First operand 9611 states and 32214 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:41,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:41,797 INFO L93 Difference]: Finished difference Result 12393 states and 40388 transitions. [2021-06-05 15:52:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:52:41,797 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:41,816 INFO L225 Difference]: With dead ends: 12393 [2021-06-05 15:52:41,816 INFO L226 Difference]: Without dead ends: 12305 [2021-06-05 15:52:41,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1650.2ms TimeCoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:52:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12305 states. [2021-06-05 15:52:41,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 9755. [2021-06-05 15:52:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9755 states, 9754 states have (on average 3.352778347344679) internal successors, (32703), 9754 states have internal predecessors, (32703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9755 states to 9755 states and 32703 transitions. [2021-06-05 15:52:41,967 INFO L78 Accepts]: Start accepts. Automaton has 9755 states and 32703 transitions. Word has length 36 [2021-06-05 15:52:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:41,967 INFO L482 AbstractCegarLoop]: Abstraction has 9755 states and 32703 transitions. [2021-06-05 15:52:41,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 9755 states and 32703 transitions. [2021-06-05 15:52:41,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:41,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:41,979 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:42,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 15:52:42,179 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:42,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1040210897, now seen corresponding path program 83 times [2021-06-05 15:52:42,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:42,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588257385] [2021-06-05 15:52:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:42,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:42,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588257385] [2021-06-05 15:52:42,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588257385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:42,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480734866] [2021-06-05 15:52:42,511 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 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 [2021-06-05 15:52:42,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:52:42,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:42,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:52:42,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:43,270 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 15:52:43,522 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 15:52:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:43,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480734866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:43,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:43,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:52:43,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764226205] [2021-06-05 15:52:43,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:52:43,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:43,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:52:43,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:52:43,659 INFO L87 Difference]: Start difference. First operand 9755 states and 32703 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:46,537 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 15:52:46,768 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-05 15:52:46,961 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 15:52:47,271 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 15:52:47,674 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-05 15:52:47,890 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-05 15:52:48,432 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2021-06-05 15:52:49,124 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2021-06-05 15:52:49,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:49,424 INFO L93 Difference]: Finished difference Result 16091 states and 52051 transitions. [2021-06-05 15:52:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:52:49,424 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:49,448 INFO L225 Difference]: With dead ends: 16091 [2021-06-05 15:52:49,449 INFO L226 Difference]: Without dead ends: 16002 [2021-06-05 15:52:49,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 5535.8ms TimeCoverageRelationStatistics Valid=1450, Invalid=8056, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 15:52:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16002 states. [2021-06-05 15:52:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16002 to 9791. [2021-06-05 15:52:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9791 states, 9790 states have (on average 3.354749744637385) internal successors, (32843), 9790 states have internal predecessors, (32843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9791 states to 9791 states and 32843 transitions. [2021-06-05 15:52:49,628 INFO L78 Accepts]: Start accepts. Automaton has 9791 states and 32843 transitions. Word has length 36 [2021-06-05 15:52:49,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:49,628 INFO L482 AbstractCegarLoop]: Abstraction has 9791 states and 32843 transitions. [2021-06-05 15:52:49,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 9791 states and 32843 transitions. [2021-06-05 15:52:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:49,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:49,640 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:49,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:49,841 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:49,841 INFO L82 PathProgramCache]: Analyzing trace with hash 562424665, now seen corresponding path program 84 times [2021-06-05 15:52:49,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:49,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583964442] [2021-06-05 15:52:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:50,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:50,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583964442] [2021-06-05 15:52:50,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583964442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:50,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141789699] [2021-06-05 15:52:50,158 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 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 [2021-06-05 15:52:50,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:52:50,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:50,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:52:50,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:50,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141789699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:50,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:50,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:52:50,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768898752] [2021-06-05 15:52:50,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:52:50,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:50,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:52:50,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:52:50,823 INFO L87 Difference]: Start difference. First operand 9791 states and 32843 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:52,574 INFO L93 Difference]: Finished difference Result 12226 states and 40208 transitions. [2021-06-05 15:52:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:52:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:52,593 INFO L225 Difference]: With dead ends: 12226 [2021-06-05 15:52:52,593 INFO L226 Difference]: Without dead ends: 12106 [2021-06-05 15:52:52,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1715.6ms TimeCoverageRelationStatistics Valid=568, Invalid=2854, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:52:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12106 states. [2021-06-05 15:52:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12106 to 9799. [2021-06-05 15:52:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9799 states, 9798 states have (on average 3.3548683404776485) internal successors, (32871), 9798 states have internal predecessors, (32871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9799 states to 9799 states and 32871 transitions. [2021-06-05 15:52:52,749 INFO L78 Accepts]: Start accepts. Automaton has 9799 states and 32871 transitions. Word has length 36 [2021-06-05 15:52:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:52,749 INFO L482 AbstractCegarLoop]: Abstraction has 9799 states and 32871 transitions. [2021-06-05 15:52:52,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:52,749 INFO L276 IsEmpty]: Start isEmpty. Operand 9799 states and 32871 transitions. [2021-06-05 15:52:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:52,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:52,760 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:52,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:52,961 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1835358373, now seen corresponding path program 85 times [2021-06-05 15:52:52,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:52,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984282758] [2021-06-05 15:52:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:53,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:53,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984282758] [2021-06-05 15:52:53,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984282758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:53,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835023407] [2021-06-05 15:52:53,272 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 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 [2021-06-05 15:52:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:53,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:52:53,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:53,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835023407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:53,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:53,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:52:53,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987863397] [2021-06-05 15:52:53,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:52:53,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:53,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:52:53,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:52:53,958 INFO L87 Difference]: Start difference. First operand 9799 states and 32871 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:55,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:55,434 INFO L93 Difference]: Finished difference Result 11929 states and 39454 transitions. [2021-06-05 15:52:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:52:55,434 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:55,451 INFO L225 Difference]: With dead ends: 11929 [2021-06-05 15:52:55,451 INFO L226 Difference]: Without dead ends: 11809 [2021-06-05 15:52:55,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1488.5ms TimeCoverageRelationStatistics Valid=448, Invalid=2308, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:52:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11809 states. [2021-06-05 15:52:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11809 to 9839. [2021-06-05 15:52:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9839 states, 9838 states have (on average 3.3558650132140677) internal successors, (33015), 9838 states have internal predecessors, (33015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9839 states to 9839 states and 33015 transitions. [2021-06-05 15:52:55,609 INFO L78 Accepts]: Start accepts. Automaton has 9839 states and 33015 transitions. Word has length 36 [2021-06-05 15:52:55,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:55,609 INFO L482 AbstractCegarLoop]: Abstraction has 9839 states and 33015 transitions. [2021-06-05 15:52:55,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 9839 states and 33015 transitions. [2021-06-05 15:52:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:55,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:55,621 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:55,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable702 [2021-06-05 15:52:55,822 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:55,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:55,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1765248337, now seen corresponding path program 86 times [2021-06-05 15:52:55,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:55,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468410943] [2021-06-05 15:52:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:56,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:56,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468410943] [2021-06-05 15:52:56,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468410943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:56,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654154095] [2021-06-05 15:52:56,152 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 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 [2021-06-05 15:52:56,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:52:56,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:56,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:52:56,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:56,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654154095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:56,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:56,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:52:56,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361781722] [2021-06-05 15:52:56,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:52:56,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:56,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:52:56,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:52:56,820 INFO L87 Difference]: Start difference. First operand 9839 states and 33015 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:58,194 INFO L93 Difference]: Finished difference Result 11109 states and 36822 transitions. [2021-06-05 15:52:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:52:58,195 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:52:58,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:58,213 INFO L225 Difference]: With dead ends: 11109 [2021-06-05 15:52:58,213 INFO L226 Difference]: Without dead ends: 10989 [2021-06-05 15:52:58,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1448.0ms TimeCoverageRelationStatistics Valid=431, Invalid=2019, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:52:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10989 states. [2021-06-05 15:52:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10989 to 9847. [2021-06-05 15:52:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9847 states, 9846 states have (on average 3.3555758683729433) internal successors, (33039), 9846 states have internal predecessors, (33039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9847 states to 9847 states and 33039 transitions. [2021-06-05 15:52:58,394 INFO L78 Accepts]: Start accepts. Automaton has 9847 states and 33039 transitions. Word has length 36 [2021-06-05 15:52:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:58,394 INFO L482 AbstractCegarLoop]: Abstraction has 9847 states and 33039 transitions. [2021-06-05 15:52:58,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 9847 states and 33039 transitions. [2021-06-05 15:52:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:52:58,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:58,406 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:58,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:58,607 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:58,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:58,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1048846579, now seen corresponding path program 87 times [2021-06-05 15:52:58,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:58,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656894201] [2021-06-05 15:52:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:58,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:58,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656894201] [2021-06-05 15:52:58,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656894201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:58,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836977399] [2021-06-05 15:52:58,935 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 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 [2021-06-05 15:52:58,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:52:58,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:52:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:59,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836977399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:59,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:59,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:52:59,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088367488] [2021-06-05 15:52:59,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:52:59,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:52:59,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:52:59,641 INFO L87 Difference]: Start difference. First operand 9847 states and 33039 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:02,055 INFO L93 Difference]: Finished difference Result 15253 states and 49125 transitions. [2021-06-05 15:53:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:53:02,055 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:02,076 INFO L225 Difference]: With dead ends: 15253 [2021-06-05 15:53:02,076 INFO L226 Difference]: Without dead ends: 15075 [2021-06-05 15:53:02,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 2272.5ms TimeCoverageRelationStatistics Valid=993, Invalid=4119, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:53:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15075 states. [2021-06-05 15:53:02,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15075 to 9913. [2021-06-05 15:53:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9913 states, 9912 states have (on average 3.355730427764326) internal successors, (33262), 9912 states have internal predecessors, (33262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9913 states to 9913 states and 33262 transitions. [2021-06-05 15:53:02,252 INFO L78 Accepts]: Start accepts. Automaton has 9913 states and 33262 transitions. Word has length 36 [2021-06-05 15:53:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:02,252 INFO L482 AbstractCegarLoop]: Abstraction has 9913 states and 33262 transitions. [2021-06-05 15:53:02,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9913 states and 33262 transitions. [2021-06-05 15:53:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:02,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:02,263 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:02,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-05 15:53:02,464 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:02,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1426910801, now seen corresponding path program 88 times [2021-06-05 15:53:02,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:02,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813383698] [2021-06-05 15:53:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:02,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:02,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813383698] [2021-06-05 15:53:02,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813383698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:02,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847481588] [2021-06-05 15:53:02,776 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 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 [2021-06-05 15:53:02,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:53:02,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:02,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:53:02,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:03,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847481588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:03,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:03,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:53:03,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873799802] [2021-06-05 15:53:03,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:53:03,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:03,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:53:03,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:53:03,474 INFO L87 Difference]: Start difference. First operand 9913 states and 33262 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:04,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:04,800 INFO L93 Difference]: Finished difference Result 11260 states and 37286 transitions. [2021-06-05 15:53:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:53:04,800 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:04,855 INFO L225 Difference]: With dead ends: 11260 [2021-06-05 15:53:04,855 INFO L226 Difference]: Without dead ends: 11140 [2021-06-05 15:53:04,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1446.0ms TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:53:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2021-06-05 15:53:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 9907. [2021-06-05 15:53:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9907 states, 9906 states have (on average 3.354936402180497) internal successors, (33234), 9906 states have internal predecessors, (33234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9907 states to 9907 states and 33234 transitions. [2021-06-05 15:53:04,989 INFO L78 Accepts]: Start accepts. Automaton has 9907 states and 33234 transitions. Word has length 36 [2021-06-05 15:53:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:04,989 INFO L482 AbstractCegarLoop]: Abstraction has 9907 states and 33234 transitions. [2021-06-05 15:53:04,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 9907 states and 33234 transitions. [2021-06-05 15:53:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:05,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:05,001 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:05,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-06-05 15:53:05,202 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:05,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:05,203 INFO L82 PathProgramCache]: Analyzing trace with hash -442588443, now seen corresponding path program 89 times [2021-06-05 15:53:05,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:05,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109699162] [2021-06-05 15:53:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:05,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:05,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109699162] [2021-06-05 15:53:05,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109699162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:05,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565054544] [2021-06-05 15:53:05,524 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 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 [2021-06-05 15:53:05,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:53:05,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:05,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:53:05,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:06,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565054544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:06,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:06,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:53:06,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333903246] [2021-06-05 15:53:06,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:53:06,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:06,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:53:06,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:53:06,150 INFO L87 Difference]: Start difference. First operand 9907 states and 33234 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:08,024 INFO L93 Difference]: Finished difference Result 12217 states and 40114 transitions. [2021-06-05 15:53:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:53:08,024 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:08,043 INFO L225 Difference]: With dead ends: 12217 [2021-06-05 15:53:08,043 INFO L226 Difference]: Without dead ends: 12163 [2021-06-05 15:53:08,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1776.7ms TimeCoverageRelationStatistics Valid=607, Invalid=3175, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:53:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12163 states. [2021-06-05 15:53:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12163 to 10085. [2021-06-05 15:53:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10085 states, 10084 states have (on average 3.347084490281634) internal successors, (33752), 10084 states have internal predecessors, (33752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10085 states to 10085 states and 33752 transitions. [2021-06-05 15:53:08,231 INFO L78 Accepts]: Start accepts. Automaton has 10085 states and 33752 transitions. Word has length 36 [2021-06-05 15:53:08,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:08,231 INFO L482 AbstractCegarLoop]: Abstraction has 10085 states and 33752 transitions. [2021-06-05 15:53:08,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:08,231 INFO L276 IsEmpty]: Start isEmpty. Operand 10085 states and 33752 transitions. [2021-06-05 15:53:08,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:08,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:08,243 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:08,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:08,443 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:08,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:08,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1280515611, now seen corresponding path program 90 times [2021-06-05 15:53:08,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:08,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916511334] [2021-06-05 15:53:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:08,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:08,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916511334] [2021-06-05 15:53:08,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916511334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:08,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909455191] [2021-06-05 15:53:08,672 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 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 [2021-06-05 15:53:08,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:53:08,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:08,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:53:08,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:09,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909455191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:09,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:09,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:53:09,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911595108] [2021-06-05 15:53:09,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:53:09,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:09,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:53:09,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:53:09,242 INFO L87 Difference]: Start difference. First operand 10085 states and 33752 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:11,701 INFO L93 Difference]: Finished difference Result 11554 states and 37757 transitions. [2021-06-05 15:53:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 15:53:11,701 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:11,718 INFO L225 Difference]: With dead ends: 11554 [2021-06-05 15:53:11,718 INFO L226 Difference]: Without dead ends: 11311 [2021-06-05 15:53:11,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1895.5ms TimeCoverageRelationStatistics Valid=678, Invalid=4434, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:53:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11311 states. [2021-06-05 15:53:11,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11311 to 10087. [2021-06-05 15:53:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10087 states, 10086 states have (on average 3.3471148126115406) internal successors, (33759), 10086 states have internal predecessors, (33759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 33759 transitions. [2021-06-05 15:53:11,877 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 33759 transitions. Word has length 36 [2021-06-05 15:53:11,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:11,877 INFO L482 AbstractCegarLoop]: Abstraction has 10087 states and 33759 transitions. [2021-06-05 15:53:11,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:11,877 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 33759 transitions. [2021-06-05 15:53:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:11,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:11,888 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:12,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:12,089 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash -764508959, now seen corresponding path program 91 times [2021-06-05 15:53:12,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:12,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628206738] [2021-06-05 15:53:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:12,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:12,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628206738] [2021-06-05 15:53:12,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628206738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:12,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324250065] [2021-06-05 15:53:12,395 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 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 [2021-06-05 15:53:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:12,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:53:12,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:13,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324250065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:13,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:13,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:53:13,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417907938] [2021-06-05 15:53:13,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:53:13,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:13,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:53:13,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:53:13,053 INFO L87 Difference]: Start difference. First operand 10087 states and 33759 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:15,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:15,022 INFO L93 Difference]: Finished difference Result 12818 states and 41972 transitions. [2021-06-05 15:53:15,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:53:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:15,041 INFO L225 Difference]: With dead ends: 12818 [2021-06-05 15:53:15,041 INFO L226 Difference]: Without dead ends: 12721 [2021-06-05 15:53:15,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1844.6ms TimeCoverageRelationStatistics Valid=643, Invalid=3263, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:53:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12721 states. [2021-06-05 15:53:15,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12721 to 10131. [2021-06-05 15:53:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10131 states, 10130 states have (on average 3.3490621915103653) internal successors, (33926), 10130 states have internal predecessors, (33926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10131 states to 10131 states and 33926 transitions. [2021-06-05 15:53:15,197 INFO L78 Accepts]: Start accepts. Automaton has 10131 states and 33926 transitions. Word has length 36 [2021-06-05 15:53:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:15,197 INFO L482 AbstractCegarLoop]: Abstraction has 10131 states and 33926 transitions. [2021-06-05 15:53:15,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:15,197 INFO L276 IsEmpty]: Start isEmpty. Operand 10131 states and 33926 transitions. [2021-06-05 15:53:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:15,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:15,209 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:15,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 15:53:15,410 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2014469349, now seen corresponding path program 92 times [2021-06-05 15:53:15,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:15,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643163600] [2021-06-05 15:53:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:15,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643163600] [2021-06-05 15:53:15,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643163600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320604788] [2021-06-05 15:53:15,755 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 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 [2021-06-05 15:53:15,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:53:15,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:53:15,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:16,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320604788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:16,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:16,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:53:16,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636190190] [2021-06-05 15:53:16,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:53:16,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:16,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:53:16,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:53:16,387 INFO L87 Difference]: Start difference. First operand 10131 states and 33926 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:19,670 INFO L93 Difference]: Finished difference Result 16789 states and 53924 transitions. [2021-06-05 15:53:19,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:53:19,670 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:19,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:19,696 INFO L225 Difference]: With dead ends: 16789 [2021-06-05 15:53:19,696 INFO L226 Difference]: Without dead ends: 16675 [2021-06-05 15:53:19,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 2818.2ms TimeCoverageRelationStatistics Valid=1240, Invalid=5566, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 15:53:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16675 states. [2021-06-05 15:53:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16675 to 10145. [2021-06-05 15:53:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10145 states, 10144 states have (on average 3.3501577287066246) internal successors, (33984), 10144 states have internal predecessors, (33984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10145 states to 10145 states and 33984 transitions. [2021-06-05 15:53:19,891 INFO L78 Accepts]: Start accepts. Automaton has 10145 states and 33984 transitions. Word has length 36 [2021-06-05 15:53:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:19,891 INFO L482 AbstractCegarLoop]: Abstraction has 10145 states and 33984 transitions. [2021-06-05 15:53:19,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 10145 states and 33984 transitions. [2021-06-05 15:53:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:19,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:19,903 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:20,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-06-05 15:53:20,103 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:20,104 INFO L82 PathProgramCache]: Analyzing trace with hash -165738267, now seen corresponding path program 93 times [2021-06-05 15:53:20,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:20,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317372364] [2021-06-05 15:53:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:20,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:20,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317372364] [2021-06-05 15:53:20,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317372364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:20,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883332149] [2021-06-05 15:53:20,379 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 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 [2021-06-05 15:53:20,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:53:20,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:20,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:53:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:20,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883332149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:20,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:20,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-06-05 15:53:20,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280794087] [2021-06-05 15:53:20,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:53:20,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:20,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:53:20,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:53:20,964 INFO L87 Difference]: Start difference. First operand 10145 states and 33984 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:26,328 INFO L93 Difference]: Finished difference Result 15370 states and 49391 transitions. [2021-06-05 15:53:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 15:53:26,328 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:26,351 INFO L225 Difference]: With dead ends: 15370 [2021-06-05 15:53:26,351 INFO L226 Difference]: Without dead ends: 15103 [2021-06-05 15:53:26,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3790 ImplicationChecksByTransitivity, 3757.3ms TimeCoverageRelationStatistics Valid=1310, Invalid=10462, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 15:53:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-06-05 15:53:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 10157. [2021-06-05 15:53:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.3509255612445843) internal successors, (34032), 10156 states have internal predecessors, (34032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 34032 transitions. [2021-06-05 15:53:26,537 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 34032 transitions. Word has length 36 [2021-06-05 15:53:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:26,537 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 34032 transitions. [2021-06-05 15:53:26,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 34032 transitions. [2021-06-05 15:53:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:26,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:26,549 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:26,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:26,749 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:26,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2004453517, now seen corresponding path program 94 times [2021-06-05 15:53:26,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:26,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861627364] [2021-06-05 15:53:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:27,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:27,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861627364] [2021-06-05 15:53:27,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861627364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:27,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98373700] [2021-06-05 15:53:27,060 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 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 [2021-06-05 15:53:27,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:53:27,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:27,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:53:27,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:27,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98373700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:27,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:27,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:53:27,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016981901] [2021-06-05 15:53:27,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:53:27,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:27,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:53:27,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:53:27,743 INFO L87 Difference]: Start difference. First operand 10157 states and 34032 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:29,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:29,563 INFO L93 Difference]: Finished difference Result 12794 states and 41988 transitions. [2021-06-05 15:53:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:53:29,563 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:29,585 INFO L225 Difference]: With dead ends: 12794 [2021-06-05 15:53:29,585 INFO L226 Difference]: Without dead ends: 12713 [2021-06-05 15:53:29,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1803.7ms TimeCoverageRelationStatistics Valid=597, Invalid=3185, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:53:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12713 states. [2021-06-05 15:53:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12713 to 10237. [2021-06-05 15:53:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10237 states, 10236 states have (on average 3.34779210629152) internal successors, (34268), 10236 states have internal predecessors, (34268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10237 states to 10237 states and 34268 transitions. [2021-06-05 15:53:29,766 INFO L78 Accepts]: Start accepts. Automaton has 10237 states and 34268 transitions. Word has length 36 [2021-06-05 15:53:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:29,767 INFO L482 AbstractCegarLoop]: Abstraction has 10237 states and 34268 transitions. [2021-06-05 15:53:29,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 10237 states and 34268 transitions. [2021-06-05 15:53:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:29,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:29,780 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:29,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-06-05 15:53:29,980 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1166526349, now seen corresponding path program 95 times [2021-06-05 15:53:29,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:29,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134730650] [2021-06-05 15:53:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:30,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:30,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134730650] [2021-06-05 15:53:30,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134730650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:30,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825787135] [2021-06-05 15:53:30,214 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 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 [2021-06-05 15:53:30,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:53:30,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:30,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:53:30,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:30,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825787135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:30,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:30,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:53:30,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414513844] [2021-06-05 15:53:30,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:53:30,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:30,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:53:30,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:53:30,779 INFO L87 Difference]: Start difference. First operand 10237 states and 34268 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:32,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:32,699 INFO L93 Difference]: Finished difference Result 11288 states and 37070 transitions. [2021-06-05 15:53:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:53:32,699 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:32,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:32,714 INFO L225 Difference]: With dead ends: 11288 [2021-06-05 15:53:32,714 INFO L226 Difference]: Without dead ends: 11112 [2021-06-05 15:53:32,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 1791.3ms TimeCoverageRelationStatistics Valid=767, Invalid=4063, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:53:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11112 states. [2021-06-05 15:53:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11112 to 10185. [2021-06-05 15:53:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10185 states, 10184 states have (on average 3.3521209740769833) internal successors, (34138), 10184 states have internal predecessors, (34138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10185 states to 10185 states and 34138 transitions. [2021-06-05 15:53:32,862 INFO L78 Accepts]: Start accepts. Automaton has 10185 states and 34138 transitions. Word has length 36 [2021-06-05 15:53:32,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:32,862 INFO L482 AbstractCegarLoop]: Abstraction has 10185 states and 34138 transitions. [2021-06-05 15:53:32,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 10185 states and 34138 transitions. [2021-06-05 15:53:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:32,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:32,874 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:33,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable782,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:33,074 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:33,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:33,074 INFO L82 PathProgramCache]: Analyzing trace with hash 488464529, now seen corresponding path program 96 times [2021-06-05 15:53:33,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:33,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933765281] [2021-06-05 15:53:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:33,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:33,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933765281] [2021-06-05 15:53:33,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933765281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:33,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771298025] [2021-06-05 15:53:33,411 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 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 [2021-06-05 15:53:33,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:53:33,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:33,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:53:33,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:34,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771298025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:34,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:34,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:53:34,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698257232] [2021-06-05 15:53:34,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:53:34,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:34,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:53:34,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:53:34,014 INFO L87 Difference]: Start difference. First operand 10185 states and 34138 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:37,759 INFO L93 Difference]: Finished difference Result 17253 states and 55366 transitions. [2021-06-05 15:53:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 15:53:37,759 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:37,786 INFO L225 Difference]: With dead ends: 17253 [2021-06-05 15:53:37,787 INFO L226 Difference]: Without dead ends: 17139 [2021-06-05 15:53:37,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 3477.2ms TimeCoverageRelationStatistics Valid=1416, Invalid=6774, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 15:53:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17139 states. [2021-06-05 15:53:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17139 to 10201. [2021-06-05 15:53:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10201 states, 10200 states have (on average 3.3519607843137256) internal successors, (34190), 10200 states have internal predecessors, (34190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10201 states to 10201 states and 34190 transitions. [2021-06-05 15:53:37,992 INFO L78 Accepts]: Start accepts. Automaton has 10201 states and 34190 transitions. Word has length 36 [2021-06-05 15:53:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:37,992 INFO L482 AbstractCegarLoop]: Abstraction has 10201 states and 34190 transitions. [2021-06-05 15:53:37,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 10201 states and 34190 transitions. [2021-06-05 15:53:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:38,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:38,005 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:38,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:38,205 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1905948305, now seen corresponding path program 97 times [2021-06-05 15:53:38,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:38,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278473399] [2021-06-05 15:53:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:38,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:38,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278473399] [2021-06-05 15:53:38,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278473399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:38,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482052571] [2021-06-05 15:53:38,450 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 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 [2021-06-05 15:53:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:38,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:53:38,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:39,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482052571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:39,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:39,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:53:39,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512981607] [2021-06-05 15:53:39,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:53:39,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:39,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:53:39,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:53:39,066 INFO L87 Difference]: Start difference. First operand 10201 states and 34190 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:41,949 INFO L93 Difference]: Finished difference Result 15169 states and 48868 transitions. [2021-06-05 15:53:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 15:53:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:41,972 INFO L225 Difference]: With dead ends: 15169 [2021-06-05 15:53:41,972 INFO L226 Difference]: Without dead ends: 14937 [2021-06-05 15:53:41,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2501.2ms TimeCoverageRelationStatistics Valid=1260, Invalid=6930, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 15:53:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14937 states. [2021-06-05 15:53:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14937 to 10183. [2021-06-05 15:53:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10183 states, 10182 states have (on average 3.350815164014928) internal successors, (34118), 10182 states have internal predecessors, (34118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:42,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10183 states to 10183 states and 34118 transitions. [2021-06-05 15:53:42,144 INFO L78 Accepts]: Start accepts. Automaton has 10183 states and 34118 transitions. Word has length 36 [2021-06-05 15:53:42,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:42,144 INFO L482 AbstractCegarLoop]: Abstraction has 10183 states and 34118 transitions. [2021-06-05 15:53:42,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 10183 states and 34118 transitions. [2021-06-05 15:53:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:42,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:42,156 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:42,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 15:53:42,356 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:42,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:42,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1396525427, now seen corresponding path program 98 times [2021-06-05 15:53:42,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:42,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709356929] [2021-06-05 15:53:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:42,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:42,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709356929] [2021-06-05 15:53:42,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709356929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:42,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487785128] [2021-06-05 15:53:42,647 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 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 [2021-06-05 15:53:42,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:53:42,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:53:42,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:43,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487785128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:43,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:43,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:53:43,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621560722] [2021-06-05 15:53:43,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:53:43,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:43,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:53:43,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:53:43,182 INFO L87 Difference]: Start difference. First operand 10183 states and 34118 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:47,715 INFO L93 Difference]: Finished difference Result 16161 states and 51778 transitions. [2021-06-05 15:53:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 15:53:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:47,738 INFO L225 Difference]: With dead ends: 16161 [2021-06-05 15:53:47,738 INFO L226 Difference]: Without dead ends: 15902 [2021-06-05 15:53:47,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4003 ImplicationChecksByTransitivity, 3501.2ms TimeCoverageRelationStatistics Valid=1569, Invalid=10203, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 15:53:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15902 states. [2021-06-05 15:53:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15902 to 10240. [2021-06-05 15:53:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10240 states, 10239 states have (on average 3.352378161929876) internal successors, (34325), 10239 states have internal predecessors, (34325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10240 states to 10240 states and 34325 transitions. [2021-06-05 15:53:47,927 INFO L78 Accepts]: Start accepts. Automaton has 10240 states and 34325 transitions. Word has length 36 [2021-06-05 15:53:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:47,927 INFO L482 AbstractCegarLoop]: Abstraction has 10240 states and 34325 transitions. [2021-06-05 15:53:47,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 10240 states and 34325 transitions. [2021-06-05 15:53:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:47,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:47,939 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:48,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable800 [2021-06-05 15:53:48,140 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:48,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1908589359, now seen corresponding path program 99 times [2021-06-05 15:53:48,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:48,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848642449] [2021-06-05 15:53:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:48,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:48,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848642449] [2021-06-05 15:53:48,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848642449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:48,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476128262] [2021-06-05 15:53:48,496 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 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 [2021-06-05 15:53:48,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:53:48,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:48,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:53:48,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:49,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476128262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:49,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:49,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:53:49,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807946825] [2021-06-05 15:53:49,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:53:49,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:53:49,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:53:49,101 INFO L87 Difference]: Start difference. First operand 10240 states and 34325 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:52,071 INFO L93 Difference]: Finished difference Result 19752 states and 64171 transitions. [2021-06-05 15:53:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:53:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:52,102 INFO L225 Difference]: With dead ends: 19752 [2021-06-05 15:53:52,102 INFO L226 Difference]: Without dead ends: 19608 [2021-06-05 15:53:52,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 2727.4ms TimeCoverageRelationStatistics Valid=1149, Invalid=4703, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:53:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19608 states. [2021-06-05 15:53:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19608 to 10257. [2021-06-05 15:53:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10257 states, 10256 states have (on average 3.3517940717628707) internal successors, (34376), 10256 states have internal predecessors, (34376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10257 states to 10257 states and 34376 transitions. [2021-06-05 15:53:52,309 INFO L78 Accepts]: Start accepts. Automaton has 10257 states and 34376 transitions. Word has length 36 [2021-06-05 15:53:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:52,309 INFO L482 AbstractCegarLoop]: Abstraction has 10257 states and 34376 transitions. [2021-06-05 15:53:52,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 10257 states and 34376 transitions. [2021-06-05 15:53:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:52,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:52,321 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:52,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:52,521 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:52,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1183551919, now seen corresponding path program 100 times [2021-06-05 15:53:52,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:52,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820837683] [2021-06-05 15:53:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:52,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:52,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820837683] [2021-06-05 15:53:52,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820837683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:52,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972784906] [2021-06-05 15:53:52,842 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 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 [2021-06-05 15:53:52,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:53:52,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:52,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:53:52,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:53,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972784906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:53,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:53,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:53:53,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745879103] [2021-06-05 15:53:53,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:53:53,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:53,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:53:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:53:53,443 INFO L87 Difference]: Start difference. First operand 10257 states and 34376 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:54,979 INFO L93 Difference]: Finished difference Result 13308 states and 43782 transitions. [2021-06-05 15:53:54,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:53:54,979 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:54,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:55,000 INFO L225 Difference]: With dead ends: 13308 [2021-06-05 15:53:55,000 INFO L226 Difference]: Without dead ends: 13188 [2021-06-05 15:53:55,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1558.8ms TimeCoverageRelationStatistics Valid=606, Invalid=2364, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:53:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13188 states. [2021-06-05 15:53:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13188 to 10257. [2021-06-05 15:53:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10257 states, 10256 states have (on average 3.3517940717628707) internal successors, (34376), 10256 states have internal predecessors, (34376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10257 states to 10257 states and 34376 transitions. [2021-06-05 15:53:55,174 INFO L78 Accepts]: Start accepts. Automaton has 10257 states and 34376 transitions. Word has length 36 [2021-06-05 15:53:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:55,174 INFO L482 AbstractCegarLoop]: Abstraction has 10257 states and 34376 transitions. [2021-06-05 15:53:55,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 10257 states and 34376 transitions. [2021-06-05 15:53:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:55,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:55,188 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:55,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-05 15:53:55,388 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:55,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:55,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1538494053, now seen corresponding path program 101 times [2021-06-05 15:53:55,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:55,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500246152] [2021-06-05 15:53:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:55,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:55,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500246152] [2021-06-05 15:53:55,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500246152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:55,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409620144] [2021-06-05 15:53:55,685 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 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 [2021-06-05 15:53:55,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:53:55,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:55,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:53:55,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:56,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409620144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:56,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:56,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:53:56,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447404443] [2021-06-05 15:53:56,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:53:56,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:56,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:53:56,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:53:56,228 INFO L87 Difference]: Start difference. First operand 10257 states and 34376 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:58,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:58,427 INFO L93 Difference]: Finished difference Result 12373 states and 40493 transitions. [2021-06-05 15:53:58,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:53:58,428 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:53:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:58,446 INFO L225 Difference]: With dead ends: 12373 [2021-06-05 15:53:58,447 INFO L226 Difference]: Without dead ends: 12120 [2021-06-05 15:53:58,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1811.5ms TimeCoverageRelationStatistics Valid=802, Invalid=4028, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:53:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12120 states. [2021-06-05 15:53:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12120 to 10415. [2021-06-05 15:53:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10415 states, 10414 states have (on average 3.3470328404071443) internal successors, (34856), 10414 states have internal predecessors, (34856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10415 states to 10415 states and 34856 transitions. [2021-06-05 15:53:58,618 INFO L78 Accepts]: Start accepts. Automaton has 10415 states and 34856 transitions. Word has length 36 [2021-06-05 15:53:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:58,618 INFO L482 AbstractCegarLoop]: Abstraction has 10415 states and 34856 transitions. [2021-06-05 15:53:58,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 10415 states and 34856 transitions. [2021-06-05 15:53:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:53:58,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:58,631 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:58,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:58,834 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:58,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:58,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1968113819, now seen corresponding path program 102 times [2021-06-05 15:53:58,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:58,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884208557] [2021-06-05 15:53:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:59,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:59,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884208557] [2021-06-05 15:53:59,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884208557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:59,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777400160] [2021-06-05 15:53:59,060 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 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 [2021-06-05 15:53:59,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:53:59,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:59,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:53:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:59,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777400160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:59,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:59,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:53:59,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383707106] [2021-06-05 15:53:59,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:53:59,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:59,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:53:59,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:53:59,616 INFO L87 Difference]: Start difference. First operand 10415 states and 34856 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:02,527 INFO L93 Difference]: Finished difference Result 15169 states and 48898 transitions. [2021-06-05 15:54:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:54:02,527 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:02,550 INFO L225 Difference]: With dead ends: 15169 [2021-06-05 15:54:02,550 INFO L226 Difference]: Without dead ends: 14971 [2021-06-05 15:54:02,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 2292.4ms TimeCoverageRelationStatistics Valid=1076, Invalid=5244, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:54:02,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14971 states. [2021-06-05 15:54:02,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14971 to 10452. [2021-06-05 15:54:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 3.348579083341307) internal successors, (34996), 10451 states have internal predecessors, (34996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 34996 transitions. [2021-06-05 15:54:02,756 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 34996 transitions. Word has length 36 [2021-06-05 15:54:02,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:02,756 INFO L482 AbstractCegarLoop]: Abstraction has 10452 states and 34996 transitions. [2021-06-05 15:54:02,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 34996 transitions. [2021-06-05 15:54:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:02,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:02,768 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:02,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-06-05 15:54:02,977 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash 297320461, now seen corresponding path program 103 times [2021-06-05 15:54:02,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:02,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22832874] [2021-06-05 15:54:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:03,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:03,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22832874] [2021-06-05 15:54:03,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22832874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:03,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935926435] [2021-06-05 15:54:03,203 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 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 [2021-06-05 15:54:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:03,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:54:03,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:03,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935926435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:03,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:03,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:54:03,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769671301] [2021-06-05 15:54:03,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:54:03,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:03,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:54:03,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:54:03,745 INFO L87 Difference]: Start difference. First operand 10452 states and 34996 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:06,256 INFO L93 Difference]: Finished difference Result 15726 states and 50688 transitions. [2021-06-05 15:54:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:54:06,256 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:06,279 INFO L225 Difference]: With dead ends: 15726 [2021-06-05 15:54:06,280 INFO L226 Difference]: Without dead ends: 15524 [2021-06-05 15:54:06,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 2258.3ms TimeCoverageRelationStatistics Valid=1127, Invalid=5035, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:54:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15524 states. [2021-06-05 15:54:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15524 to 10429. [2021-06-05 15:54:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10429 states, 10428 states have (on average 3.3469505178365937) internal successors, (34902), 10428 states have internal predecessors, (34902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10429 states to 10429 states and 34902 transitions. [2021-06-05 15:54:06,472 INFO L78 Accepts]: Start accepts. Automaton has 10429 states and 34902 transitions. Word has length 36 [2021-06-05 15:54:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:06,472 INFO L482 AbstractCegarLoop]: Abstraction has 10429 states and 34902 transitions. [2021-06-05 15:54:06,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 10429 states and 34902 transitions. [2021-06-05 15:54:06,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:06,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:06,485 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:06,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:06,685 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1098339159, now seen corresponding path program 104 times [2021-06-05 15:54:06,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:06,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136145292] [2021-06-05 15:54:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:06,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:06,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136145292] [2021-06-05 15:54:06,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136145292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:06,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502072513] [2021-06-05 15:54:06,959 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 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 [2021-06-05 15:54:06,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:06,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:06,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:54:06,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:07,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502072513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:07,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:07,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:54:07,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442389995] [2021-06-05 15:54:07,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:54:07,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:07,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:54:07,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:54:07,492 INFO L87 Difference]: Start difference. First operand 10429 states and 34902 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:08,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:08,823 INFO L93 Difference]: Finished difference Result 11947 states and 39281 transitions. [2021-06-05 15:54:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:54:08,823 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:08,841 INFO L225 Difference]: With dead ends: 11947 [2021-06-05 15:54:08,841 INFO L226 Difference]: Without dead ends: 11754 [2021-06-05 15:54:08,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1392.7ms TimeCoverageRelationStatistics Valid=455, Invalid=2515, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:54:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11754 states. [2021-06-05 15:54:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11754 to 10440. [2021-06-05 15:54:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 3.347830251939841) internal successors, (34948), 10439 states have internal predecessors, (34948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 34948 transitions. [2021-06-05 15:54:09,076 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 34948 transitions. Word has length 36 [2021-06-05 15:54:09,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:09,076 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 34948 transitions. [2021-06-05 15:54:09,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 34948 transitions. [2021-06-05 15:54:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:09,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:09,088 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:09,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:09,288 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:09,288 INFO L82 PathProgramCache]: Analyzing trace with hash -146066803, now seen corresponding path program 105 times [2021-06-05 15:54:09,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:09,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017734325] [2021-06-05 15:54:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:09,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:09,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017734325] [2021-06-05 15:54:09,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017734325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:09,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369045478] [2021-06-05 15:54:09,525 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 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 [2021-06-05 15:54:09,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:54:09,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:09,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:54:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:10,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369045478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:10,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:10,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:54:10,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327547006] [2021-06-05 15:54:10,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:54:10,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:54:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:54:10,062 INFO L87 Difference]: Start difference. First operand 10440 states and 34948 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:11,526 INFO L93 Difference]: Finished difference Result 17451 states and 57222 transitions. [2021-06-05 15:54:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:54:11,526 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:11,558 INFO L225 Difference]: With dead ends: 17451 [2021-06-05 15:54:11,558 INFO L226 Difference]: Without dead ends: 17371 [2021-06-05 15:54:11,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1208.0ms TimeCoverageRelationStatistics Valid=543, Invalid=2213, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:54:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17371 states. [2021-06-05 15:54:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17371 to 10503. [2021-06-05 15:54:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10503 states, 10502 states have (on average 3.3498381260712247) internal successors, (35180), 10502 states have internal predecessors, (35180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10503 states to 10503 states and 35180 transitions. [2021-06-05 15:54:11,781 INFO L78 Accepts]: Start accepts. Automaton has 10503 states and 35180 transitions. Word has length 36 [2021-06-05 15:54:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:11,781 INFO L482 AbstractCegarLoop]: Abstraction has 10503 states and 35180 transitions. [2021-06-05 15:54:11,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 10503 states and 35180 transitions. [2021-06-05 15:54:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:11,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:11,793 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:11,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-06-05 15:54:11,993 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash -533222687, now seen corresponding path program 106 times [2021-06-05 15:54:11,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:11,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071186040] [2021-06-05 15:54:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:12,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:12,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071186040] [2021-06-05 15:54:12,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071186040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:12,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137682132] [2021-06-05 15:54:12,213 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 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 [2021-06-05 15:54:12,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:54:12,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:12,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:54:12,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:12,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137682132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:12,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:12,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:54:12,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736744154] [2021-06-05 15:54:12,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:54:12,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:12,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:54:12,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:54:12,872 INFO L87 Difference]: Start difference. First operand 10503 states and 35180 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:14,733 INFO L93 Difference]: Finished difference Result 16343 states and 53660 transitions. [2021-06-05 15:54:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:54:14,733 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:14,761 INFO L225 Difference]: With dead ends: 16343 [2021-06-05 15:54:14,761 INFO L226 Difference]: Without dead ends: 16263 [2021-06-05 15:54:14,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1600.5ms TimeCoverageRelationStatistics Valid=680, Invalid=2980, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:54:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16263 states. [2021-06-05 15:54:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16263 to 10501. [2021-06-05 15:54:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10501 states, 10500 states have (on average 3.349904761904762) internal successors, (35174), 10500 states have internal predecessors, (35174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10501 states to 10501 states and 35174 transitions. [2021-06-05 15:54:14,984 INFO L78 Accepts]: Start accepts. Automaton has 10501 states and 35174 transitions. Word has length 36 [2021-06-05 15:54:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:14,984 INFO L482 AbstractCegarLoop]: Abstraction has 10501 states and 35174 transitions. [2021-06-05 15:54:14,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 10501 states and 35174 transitions. [2021-06-05 15:54:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:14,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:14,996 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:15,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:15,201 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:15,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:15,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1932805219, now seen corresponding path program 107 times [2021-06-05 15:54:15,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:15,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260266895] [2021-06-05 15:54:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:15,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:15,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260266895] [2021-06-05 15:54:15,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260266895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:15,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073069511] [2021-06-05 15:54:15,527 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 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 [2021-06-05 15:54:15,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:54:15,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:15,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:54:15,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:16,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073069511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:16,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:16,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:54:16,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136023503] [2021-06-05 15:54:16,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:54:16,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:16,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:54:16,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:54:16,175 INFO L87 Difference]: Start difference. First operand 10501 states and 35174 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:19,457 INFO L93 Difference]: Finished difference Result 15923 states and 51600 transitions. [2021-06-05 15:54:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:54:19,457 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:19,480 INFO L225 Difference]: With dead ends: 15923 [2021-06-05 15:54:19,480 INFO L226 Difference]: Without dead ends: 15816 [2021-06-05 15:54:19,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 2731.5ms TimeCoverageRelationStatistics Valid=1124, Invalid=5682, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 15:54:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15816 states. [2021-06-05 15:54:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15816 to 10595. [2021-06-05 15:54:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 3.35019822541061) internal successors, (35492), 10594 states have internal predecessors, (35492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 35492 transitions. [2021-06-05 15:54:19,674 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 35492 transitions. Word has length 36 [2021-06-05 15:54:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:19,674 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 35492 transitions. [2021-06-05 15:54:19,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 35492 transitions. [2021-06-05 15:54:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:19,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:19,687 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:19,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable861,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:19,887 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:19,888 INFO L82 PathProgramCache]: Analyzing trace with hash -648664159, now seen corresponding path program 108 times [2021-06-05 15:54:19,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:19,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414912892] [2021-06-05 15:54:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:20,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:20,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414912892] [2021-06-05 15:54:20,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414912892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:20,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002490141] [2021-06-05 15:54:20,158 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 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 [2021-06-05 15:54:20,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:54:20,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:20,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:54:20,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:20,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002490141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:20,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:20,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:54:20,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598939453] [2021-06-05 15:54:20,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:54:20,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:54:20,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:54:20,712 INFO L87 Difference]: Start difference. First operand 10595 states and 35492 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:24,914 INFO L93 Difference]: Finished difference Result 18637 states and 59259 transitions. [2021-06-05 15:54:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 15:54:24,914 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:24,941 INFO L225 Difference]: With dead ends: 18637 [2021-06-05 15:54:24,941 INFO L226 Difference]: Without dead ends: 18454 [2021-06-05 15:54:24,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2976 ImplicationChecksByTransitivity, 3206.9ms TimeCoverageRelationStatistics Valid=1482, Invalid=7830, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 15:54:24,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18454 states. [2021-06-05 15:54:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18454 to 10613. [2021-06-05 15:54:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 3.3513004146249528) internal successors, (35564), 10612 states have internal predecessors, (35564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 35564 transitions. [2021-06-05 15:54:25,164 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 35564 transitions. Word has length 36 [2021-06-05 15:54:25,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:25,164 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 35564 transitions. [2021-06-05 15:54:25,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:25,164 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 35564 transitions. [2021-06-05 15:54:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:25,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:25,178 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:25,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-06-05 15:54:25,378 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:25,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:25,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1625491043, now seen corresponding path program 109 times [2021-06-05 15:54:25,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:25,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696092944] [2021-06-05 15:54:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:25,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:25,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696092944] [2021-06-05 15:54:25,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696092944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:25,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355084593] [2021-06-05 15:54:25,633 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 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 [2021-06-05 15:54:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:54:25,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:26,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355084593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:26,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:26,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:54:26,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283007700] [2021-06-05 15:54:26,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:54:26,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:26,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:54:26,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:54:26,273 INFO L87 Difference]: Start difference. First operand 10613 states and 35564 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:30,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:30,738 INFO L93 Difference]: Finished difference Result 18780 states and 59813 transitions. [2021-06-05 15:54:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 15:54:30,739 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:30,765 INFO L225 Difference]: With dead ends: 18780 [2021-06-05 15:54:30,766 INFO L226 Difference]: Without dead ends: 18608 [2021-06-05 15:54:30,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 3355.0ms TimeCoverageRelationStatistics Valid=1714, Invalid=8186, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 15:54:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18608 states. [2021-06-05 15:54:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18608 to 10593. [2021-06-05 15:54:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10593 states, 10592 states have (on average 3.3500755287009065) internal successors, (35484), 10592 states have internal predecessors, (35484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10593 states to 10593 states and 35484 transitions. [2021-06-05 15:54:30,987 INFO L78 Accepts]: Start accepts. Automaton has 10593 states and 35484 transitions. Word has length 36 [2021-06-05 15:54:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:30,987 INFO L482 AbstractCegarLoop]: Abstraction has 10593 states and 35484 transitions. [2021-06-05 15:54:30,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 10593 states and 35484 transitions. [2021-06-05 15:54:30,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:30,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:30,999 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:31,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable869,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:31,200 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:31,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:31,200 INFO L82 PathProgramCache]: Analyzing trace with hash 455377993, now seen corresponding path program 110 times [2021-06-05 15:54:31,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:31,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459492797] [2021-06-05 15:54:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:31,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:31,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459492797] [2021-06-05 15:54:31,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459492797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:31,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62148040] [2021-06-05 15:54:31,562 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 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 [2021-06-05 15:54:31,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:31,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:31,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:54:31,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:32,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62148040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:32,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:32,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:54:32,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102882] [2021-06-05 15:54:32,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:54:32,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:32,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:54:32,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:54:32,153 INFO L87 Difference]: Start difference. First operand 10593 states and 35484 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:34,638 INFO L93 Difference]: Finished difference Result 15959 states and 51655 transitions. [2021-06-05 15:54:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:54:34,638 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:34,662 INFO L225 Difference]: With dead ends: 15959 [2021-06-05 15:54:34,663 INFO L226 Difference]: Without dead ends: 15821 [2021-06-05 15:54:34,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2318.4ms TimeCoverageRelationStatistics Valid=993, Invalid=4557, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:54:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15821 states. [2021-06-05 15:54:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15821 to 10619. [2021-06-05 15:54:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10619 states, 10618 states have (on average 3.351290261819552) internal successors, (35584), 10618 states have internal predecessors, (35584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10619 states to 10619 states and 35584 transitions. [2021-06-05 15:54:34,845 INFO L78 Accepts]: Start accepts. Automaton has 10619 states and 35584 transitions. Word has length 36 [2021-06-05 15:54:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:34,845 INFO L482 AbstractCegarLoop]: Abstraction has 10619 states and 35584 transitions. [2021-06-05 15:54:34,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 10619 states and 35584 transitions. [2021-06-05 15:54:34,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:34,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:34,857 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:35,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable873 [2021-06-05 15:54:35,058 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:35,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1739519053, now seen corresponding path program 111 times [2021-06-05 15:54:35,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:35,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633808653] [2021-06-05 15:54:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:35,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:35,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633808653] [2021-06-05 15:54:35,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633808653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:35,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380109665] [2021-06-05 15:54:35,313 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 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 [2021-06-05 15:54:35,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:54:35,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:54:35,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:35,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380109665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:35,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:35,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:54:35,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264986497] [2021-06-05 15:54:35,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:54:35,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:35,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:54:35,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:54:35,916 INFO L87 Difference]: Start difference. First operand 10619 states and 35584 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:40,429 INFO L93 Difference]: Finished difference Result 18681 states and 59398 transitions. [2021-06-05 15:54:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 15:54:40,429 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:40,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:40,454 INFO L225 Difference]: With dead ends: 18681 [2021-06-05 15:54:40,454 INFO L226 Difference]: Without dead ends: 18498 [2021-06-05 15:54:40,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 3472.8ms TimeCoverageRelationStatistics Valid=1538, Invalid=8164, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 15:54:40,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18498 states. [2021-06-05 15:54:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18498 to 10601. [2021-06-05 15:54:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10601 states, 10600 states have (on average 3.350188679245283) internal successors, (35512), 10600 states have internal predecessors, (35512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10601 states to 10601 states and 35512 transitions. [2021-06-05 15:54:40,666 INFO L78 Accepts]: Start accepts. Automaton has 10601 states and 35512 transitions. Word has length 36 [2021-06-05 15:54:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:40,666 INFO L482 AbstractCegarLoop]: Abstraction has 10601 states and 35512 transitions. [2021-06-05 15:54:40,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 10601 states and 35512 transitions. [2021-06-05 15:54:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:40,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:40,679 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:40,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:40,880 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:40,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:40,880 INFO L82 PathProgramCache]: Analyzing trace with hash 762692169, now seen corresponding path program 112 times [2021-06-05 15:54:40,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:40,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69452122] [2021-06-05 15:54:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:41,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:41,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69452122] [2021-06-05 15:54:41,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69452122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:41,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593747213] [2021-06-05 15:54:41,133 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 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 [2021-06-05 15:54:41,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:54:41,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:41,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:54:41,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:41,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593747213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:41,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:41,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:54:41,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592185186] [2021-06-05 15:54:41,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:54:41,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:41,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:54:41,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:54:41,732 INFO L87 Difference]: Start difference. First operand 10601 states and 35512 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:45,980 INFO L93 Difference]: Finished difference Result 18616 states and 59315 transitions. [2021-06-05 15:54:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 15:54:45,981 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:46,011 INFO L225 Difference]: With dead ends: 18616 [2021-06-05 15:54:46,012 INFO L226 Difference]: Without dead ends: 18444 [2021-06-05 15:54:46,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3537 ImplicationChecksByTransitivity, 3547.2ms TimeCoverageRelationStatistics Valid=1882, Invalid=9038, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 15:54:46,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18444 states. [2021-06-05 15:54:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18444 to 10589. [2021-06-05 15:54:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10589 states, 10588 states have (on average 3.349452210049112) internal successors, (35464), 10588 states have internal predecessors, (35464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10589 states to 10589 states and 35464 transitions. [2021-06-05 15:54:46,255 INFO L78 Accepts]: Start accepts. Automaton has 10589 states and 35464 transitions. Word has length 36 [2021-06-05 15:54:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:46,255 INFO L482 AbstractCegarLoop]: Abstraction has 10589 states and 35464 transitions. [2021-06-05 15:54:46,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 10589 states and 35464 transitions. [2021-06-05 15:54:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:46,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:46,268 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:46,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-06-05 15:54:46,469 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:46,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2003431283, now seen corresponding path program 113 times [2021-06-05 15:54:46,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:46,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89523519] [2021-06-05 15:54:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:46,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:46,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89523519] [2021-06-05 15:54:46,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89523519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:46,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911503540] [2021-06-05 15:54:46,807 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 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 [2021-06-05 15:54:46,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:54:46,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:46,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:54:46,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:47,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911503540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:47,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:47,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:54:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033387520] [2021-06-05 15:54:47,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:54:47,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:47,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:54:47,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:54:47,450 INFO L87 Difference]: Start difference. First operand 10589 states and 35464 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:50,758 INFO L93 Difference]: Finished difference Result 15850 states and 51407 transitions. [2021-06-05 15:54:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 15:54:50,758 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:50,782 INFO L225 Difference]: With dead ends: 15850 [2021-06-05 15:54:50,782 INFO L226 Difference]: Without dead ends: 15743 [2021-06-05 15:54:50,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2462 ImplicationChecksByTransitivity, 3032.5ms TimeCoverageRelationStatistics Valid=1239, Invalid=6593, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 15:54:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15743 states. [2021-06-05 15:54:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15743 to 10615. [2021-06-05 15:54:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10615 states, 10614 states have (on average 3.3499152063312607) internal successors, (35556), 10614 states have internal predecessors, (35556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10615 states to 10615 states and 35556 transitions. [2021-06-05 15:54:50,964 INFO L78 Accepts]: Start accepts. Automaton has 10615 states and 35556 transitions. Word has length 36 [2021-06-05 15:54:50,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:50,964 INFO L482 AbstractCegarLoop]: Abstraction has 10615 states and 35556 transitions. [2021-06-05 15:54:50,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 10615 states and 35556 transitions. [2021-06-05 15:54:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:50,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:50,976 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:51,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 15:54:51,177 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:51,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:51,177 INFO L82 PathProgramCache]: Analyzing trace with hash -719290223, now seen corresponding path program 114 times [2021-06-05 15:54:51,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:51,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211588827] [2021-06-05 15:54:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:51,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:51,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211588827] [2021-06-05 15:54:51,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211588827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:51,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334648628] [2021-06-05 15:54:51,425 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 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 [2021-06-05 15:54:51,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:54:51,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:51,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:54:51,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:51,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334648628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:51,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:51,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:54:51,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969457724] [2021-06-05 15:54:51,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:54:51,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:51,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:54:51,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:54:51,984 INFO L87 Difference]: Start difference. First operand 10615 states and 35556 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:56,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:56,277 INFO L93 Difference]: Finished difference Result 18195 states and 57913 transitions. [2021-06-05 15:54:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 15:54:56,277 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:56,304 INFO L225 Difference]: With dead ends: 18195 [2021-06-05 15:54:56,305 INFO L226 Difference]: Without dead ends: 18012 [2021-06-05 15:54:56,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3598 ImplicationChecksByTransitivity, 3504.3ms TimeCoverageRelationStatistics Valid=1673, Invalid=9039, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 15:54:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-06-05 15:54:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 10571. [2021-06-05 15:54:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.34720908230842) internal successors, (35380), 10570 states have internal predecessors, (35380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 35380 transitions. [2021-06-05 15:54:56,523 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 35380 transitions. Word has length 36 [2021-06-05 15:54:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:56,523 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 35380 transitions. [2021-06-05 15:54:56,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 35380 transitions. [2021-06-05 15:54:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:56,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:56,536 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:56,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable892 [2021-06-05 15:54:56,736 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1153774679, now seen corresponding path program 115 times [2021-06-05 15:54:56,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:56,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887663674] [2021-06-05 15:54:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:57,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:57,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887663674] [2021-06-05 15:54:57,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887663674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:57,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628870459] [2021-06-05 15:54:57,005 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 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 [2021-06-05 15:54:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:54:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:57,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628870459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:57,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:57,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:54:57,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619662294] [2021-06-05 15:54:57,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:54:57,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:57,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:54:57,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:54:57,674 INFO L87 Difference]: Start difference. First operand 10571 states and 35380 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:59,289 INFO L93 Difference]: Finished difference Result 12516 states and 41213 transitions. [2021-06-05 15:54:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:54:59,289 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:54:59,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:59,309 INFO L225 Difference]: With dead ends: 12516 [2021-06-05 15:54:59,309 INFO L226 Difference]: Without dead ends: 12391 [2021-06-05 15:54:59,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1531.7ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:54:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12391 states. [2021-06-05 15:54:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12391 to 10595. [2021-06-05 15:54:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 3.3475552199358125) internal successors, (35464), 10594 states have internal predecessors, (35464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 35464 transitions. [2021-06-05 15:54:59,474 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 35464 transitions. Word has length 36 [2021-06-05 15:54:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:59,474 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 35464 transitions. [2021-06-05 15:54:59,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:59,475 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 35464 transitions. [2021-06-05 15:54:59,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:54:59,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:59,487 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:59,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable896,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:59,688 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:59,688 INFO L82 PathProgramCache]: Analyzing trace with hash -232072539, now seen corresponding path program 116 times [2021-06-05 15:54:59,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:59,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637353704] [2021-06-05 15:54:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:59,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:59,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637353704] [2021-06-05 15:54:59,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637353704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:59,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673478500] [2021-06-05 15:54:59,959 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 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 [2021-06-05 15:54:59,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:59,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:59,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:54:59,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:00,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673478500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:00,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:00,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:55:00,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161157751] [2021-06-05 15:55:00,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:55:00,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:00,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:55:00,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:55:00,581 INFO L87 Difference]: Start difference. First operand 10595 states and 35464 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:01,956 INFO L93 Difference]: Finished difference Result 13270 states and 43440 transitions. [2021-06-05 15:55:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:55:01,956 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:01,978 INFO L225 Difference]: With dead ends: 13270 [2021-06-05 15:55:01,978 INFO L226 Difference]: Without dead ends: 13138 [2021-06-05 15:55:01,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1343.3ms TimeCoverageRelationStatistics Valid=523, Invalid=1927, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:55:01,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13138 states. [2021-06-05 15:55:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13138 to 10585. [2021-06-05 15:55:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10585 states, 10584 states have (on average 3.3473167044595615) internal successors, (35428), 10584 states have internal predecessors, (35428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 35428 transitions. [2021-06-05 15:55:02,170 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 35428 transitions. Word has length 36 [2021-06-05 15:55:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:02,170 INFO L482 AbstractCegarLoop]: Abstraction has 10585 states and 35428 transitions. [2021-06-05 15:55:02,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 35428 transitions. [2021-06-05 15:55:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:02,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:02,183 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:02,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-06-05 15:55:02,393 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:02,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:02,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1492112215, now seen corresponding path program 117 times [2021-06-05 15:55:02,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:02,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515001345] [2021-06-05 15:55:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:02,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:02,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515001345] [2021-06-05 15:55:02,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515001345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:02,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296168714] [2021-06-05 15:55:02,672 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 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 [2021-06-05 15:55:02,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:55:02,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:02,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:55:02,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:03,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296168714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:03,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:03,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:55:03,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073758270] [2021-06-05 15:55:03,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:55:03,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:03,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:55:03,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:55:03,213 INFO L87 Difference]: Start difference. First operand 10585 states and 35428 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:04,803 INFO L93 Difference]: Finished difference Result 12032 states and 39573 transitions. [2021-06-05 15:55:04,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:55:04,804 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:04,823 INFO L225 Difference]: With dead ends: 12032 [2021-06-05 15:55:04,823 INFO L226 Difference]: Without dead ends: 11839 [2021-06-05 15:55:04,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1402.0ms TimeCoverageRelationStatistics Valid=456, Invalid=2406, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:55:04,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11839 states. [2021-06-05 15:55:04,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11839 to 10585. [2021-06-05 15:55:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10585 states, 10584 states have (on average 3.3473167044595615) internal successors, (35428), 10584 states have internal predecessors, (35428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 35428 transitions. [2021-06-05 15:55:05,018 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 35428 transitions. Word has length 36 [2021-06-05 15:55:05,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:05,019 INFO L482 AbstractCegarLoop]: Abstraction has 10585 states and 35428 transitions. [2021-06-05 15:55:05,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:05,019 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 35428 transitions. [2021-06-05 15:55:05,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:05,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:05,032 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:05,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable913,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:05,233 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:05,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1727967773, now seen corresponding path program 118 times [2021-06-05 15:55:05,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:05,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825262908] [2021-06-05 15:55:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:05,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:05,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825262908] [2021-06-05 15:55:05,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825262908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:05,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812959588] [2021-06-05 15:55:05,609 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 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 [2021-06-05 15:55:05,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:55:05,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:05,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:55:05,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:06,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812959588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:06,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:06,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:55:06,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69138789] [2021-06-05 15:55:06,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:55:06,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:06,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:55:06,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:55:06,394 INFO L87 Difference]: Start difference. First operand 10585 states and 35428 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:08,732 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-05 15:55:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:10,113 INFO L93 Difference]: Finished difference Result 17457 states and 56009 transitions. [2021-06-05 15:55:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 15:55:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:10,144 INFO L225 Difference]: With dead ends: 17457 [2021-06-05 15:55:10,145 INFO L226 Difference]: Without dead ends: 17331 [2021-06-05 15:55:10,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2319 ImplicationChecksByTransitivity, 3310.2ms TimeCoverageRelationStatistics Valid=1040, Invalid=6270, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:55:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17331 states. [2021-06-05 15:55:10,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17331 to 10578. [2021-06-05 15:55:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10578 states, 10577 states have (on average 3.346222936560461) internal successors, (35393), 10577 states have internal predecessors, (35393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:10,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10578 states to 10578 states and 35393 transitions. [2021-06-05 15:55:10,366 INFO L78 Accepts]: Start accepts. Automaton has 10578 states and 35393 transitions. Word has length 36 [2021-06-05 15:55:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:10,367 INFO L482 AbstractCegarLoop]: Abstraction has 10578 states and 35393 transitions. [2021-06-05 15:55:10,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:10,367 INFO L276 IsEmpty]: Start isEmpty. Operand 10578 states and 35393 transitions. [2021-06-05 15:55:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:10,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:10,379 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:10,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:10,593 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:10,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1692290787, now seen corresponding path program 119 times [2021-06-05 15:55:10,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:10,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523150732] [2021-06-05 15:55:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:10,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:10,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523150732] [2021-06-05 15:55:10,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523150732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:10,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450955288] [2021-06-05 15:55:10,953 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 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 [2021-06-05 15:55:10,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:55:10,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:10,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:55:10,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:11,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450955288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:11,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:11,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:55:11,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926480653] [2021-06-05 15:55:11,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:55:11,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:11,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:55:11,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:55:11,706 INFO L87 Difference]: Start difference. First operand 10578 states and 35393 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:15,178 INFO L93 Difference]: Finished difference Result 16840 states and 54057 transitions. [2021-06-05 15:55:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:55:15,178 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:15,206 INFO L225 Difference]: With dead ends: 16840 [2021-06-05 15:55:15,207 INFO L226 Difference]: Without dead ends: 16751 [2021-06-05 15:55:15,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2999.7ms TimeCoverageRelationStatistics Valid=885, Invalid=5757, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:55:15,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16751 states. [2021-06-05 15:55:15,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16751 to 10636. [2021-06-05 15:55:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10636 states, 10635 states have (on average 3.3441466854724964) internal successors, (35565), 10635 states have internal predecessors, (35565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10636 states to 10636 states and 35565 transitions. [2021-06-05 15:55:15,405 INFO L78 Accepts]: Start accepts. Automaton has 10636 states and 35565 transitions. Word has length 36 [2021-06-05 15:55:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:15,405 INFO L482 AbstractCegarLoop]: Abstraction has 10636 states and 35565 transitions. [2021-06-05 15:55:15,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:15,406 INFO L276 IsEmpty]: Start isEmpty. Operand 10636 states and 35565 transitions. [2021-06-05 15:55:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:15,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:15,419 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:15,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable929 [2021-06-05 15:55:15,619 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:15,620 INFO L82 PathProgramCache]: Analyzing trace with hash -204015587, now seen corresponding path program 120 times [2021-06-05 15:55:15,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:15,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992358023] [2021-06-05 15:55:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:15,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:15,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992358023] [2021-06-05 15:55:15,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992358023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:15,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849951475] [2021-06-05 15:55:15,858 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 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 [2021-06-05 15:55:15,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:55:15,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:15,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:55:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:16,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849951475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:16,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:16,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:55:16,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210631510] [2021-06-05 15:55:16,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:55:16,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:16,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:55:16,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:55:16,437 INFO L87 Difference]: Start difference. First operand 10636 states and 35565 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:21,805 INFO L93 Difference]: Finished difference Result 18038 states and 57489 transitions. [2021-06-05 15:55:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 15:55:21,805 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:21,833 INFO L225 Difference]: With dead ends: 18038 [2021-06-05 15:55:21,833 INFO L226 Difference]: Without dead ends: 17807 [2021-06-05 15:55:21,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4193 ImplicationChecksByTransitivity, 3838.2ms TimeCoverageRelationStatistics Valid=1396, Invalid=10814, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 15:55:21,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17807 states. [2021-06-05 15:55:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17807 to 10618. [2021-06-05 15:55:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10618 states, 10617 states have (on average 3.34265800131864) internal successors, (35489), 10617 states have internal predecessors, (35489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10618 states to 10618 states and 35489 transitions. [2021-06-05 15:55:22,095 INFO L78 Accepts]: Start accepts. Automaton has 10618 states and 35489 transitions. Word has length 36 [2021-06-05 15:55:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:22,095 INFO L482 AbstractCegarLoop]: Abstraction has 10618 states and 35489 transitions. [2021-06-05 15:55:22,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 10618 states and 35489 transitions. [2021-06-05 15:55:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:22,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:22,108 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:22,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:22,308 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1384976611, now seen corresponding path program 121 times [2021-06-05 15:55:22,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:22,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82728633] [2021-06-05 15:55:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:22,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:22,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82728633] [2021-06-05 15:55:22,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82728633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:22,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606358522] [2021-06-05 15:55:22,628 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 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 [2021-06-05 15:55:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:22,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:55:22,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:23,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606358522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:23,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:23,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:55:23,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728585413] [2021-06-05 15:55:23,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:55:23,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:55:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:55:23,265 INFO L87 Difference]: Start difference. First operand 10618 states and 35489 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:29,121 INFO L93 Difference]: Finished difference Result 20257 states and 64198 transitions. [2021-06-05 15:55:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 15:55:29,122 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:29,152 INFO L225 Difference]: With dead ends: 20257 [2021-06-05 15:55:29,152 INFO L226 Difference]: Without dead ends: 20085 [2021-06-05 15:55:29,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4405 ImplicationChecksByTransitivity, 4279.0ms TimeCoverageRelationStatistics Valid=1962, Invalid=10920, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 15:55:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20085 states. [2021-06-05 15:55:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20085 to 10608. [2021-06-05 15:55:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 3.342038276609786) internal successors, (35449), 10607 states have internal predecessors, (35449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 35449 transitions. [2021-06-05 15:55:29,438 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 35449 transitions. Word has length 36 [2021-06-05 15:55:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:29,438 INFO L482 AbstractCegarLoop]: Abstraction has 10608 states and 35449 transitions. [2021-06-05 15:55:29,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 35449 transitions. [2021-06-05 15:55:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:29,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:29,451 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:29,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:29,657 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:29,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1831718969, now seen corresponding path program 122 times [2021-06-05 15:55:29,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:29,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300263631] [2021-06-05 15:55:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:30,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:30,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300263631] [2021-06-05 15:55:30,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300263631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:30,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732427280] [2021-06-05 15:55:30,036 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 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 [2021-06-05 15:55:30,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:55:30,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:30,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:55:30,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:30,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732427280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:30,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:30,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:55:30,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381278685] [2021-06-05 15:55:30,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:55:30,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:30,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:55:30,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:55:30,780 INFO L87 Difference]: Start difference. First operand 10608 states and 35449 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:32,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:32,628 INFO L93 Difference]: Finished difference Result 12348 states and 40169 transitions. [2021-06-05 15:55:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:55:32,628 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:32,648 INFO L225 Difference]: With dead ends: 12348 [2021-06-05 15:55:32,648 INFO L226 Difference]: Without dead ends: 12234 [2021-06-05 15:55:32,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1816.5ms TimeCoverageRelationStatistics Valid=417, Invalid=2775, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:55:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12234 states. [2021-06-05 15:55:32,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12234 to 10814. [2021-06-05 15:55:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10814 states, 10813 states have (on average 3.3427355960418015) internal successors, (36145), 10813 states have internal predecessors, (36145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10814 states to 10814 states and 36145 transitions. [2021-06-05 15:55:32,867 INFO L78 Accepts]: Start accepts. Automaton has 10814 states and 36145 transitions. Word has length 36 [2021-06-05 15:55:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:32,867 INFO L482 AbstractCegarLoop]: Abstraction has 10814 states and 36145 transitions. [2021-06-05 15:55:32,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 10814 states and 36145 transitions. [2021-06-05 15:55:32,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:32,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:32,880 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:33,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-05 15:55:33,080 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:33,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1596323637, now seen corresponding path program 123 times [2021-06-05 15:55:33,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:33,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013911801] [2021-06-05 15:55:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:33,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:33,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013911801] [2021-06-05 15:55:33,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013911801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:33,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585151938] [2021-06-05 15:55:33,442 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 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 [2021-06-05 15:55:33,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:55:33,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:33,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:55:33,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:34,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585151938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:34,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:34,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 15:55:34,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537468846] [2021-06-05 15:55:34,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:55:34,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:55:34,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:55:34,195 INFO L87 Difference]: Start difference. First operand 10814 states and 36145 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:37,334 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 15:55:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:38,650 INFO L93 Difference]: Finished difference Result 17464 states and 55985 transitions. [2021-06-05 15:55:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 15:55:38,651 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:38,679 INFO L225 Difference]: With dead ends: 17464 [2021-06-05 15:55:38,679 INFO L226 Difference]: Without dead ends: 17317 [2021-06-05 15:55:38,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2778 ImplicationChecksByTransitivity, 3818.3ms TimeCoverageRelationStatistics Valid=1345, Invalid=7211, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 15:55:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17317 states. [2021-06-05 15:55:38,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17317 to 10979. [2021-06-05 15:55:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10979 states, 10978 states have (on average 3.344962652577883) internal successors, (36721), 10978 states have internal predecessors, (36721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 36721 transitions. [2021-06-05 15:55:38,899 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 36721 transitions. Word has length 36 [2021-06-05 15:55:38,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:38,899 INFO L482 AbstractCegarLoop]: Abstraction has 10979 states and 36721 transitions. [2021-06-05 15:55:38,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 36721 transitions. [2021-06-05 15:55:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:38,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:38,912 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:39,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable950,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:39,112 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:39,113 INFO L82 PathProgramCache]: Analyzing trace with hash 676724705, now seen corresponding path program 124 times [2021-06-05 15:55:39,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:39,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271999477] [2021-06-05 15:55:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:39,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:39,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271999477] [2021-06-05 15:55:39,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271999477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:39,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113014938] [2021-06-05 15:55:39,454 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 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 [2021-06-05 15:55:39,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:55:39,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:39,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:55:39,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:40,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113014938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:40,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:40,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:55:40,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279670637] [2021-06-05 15:55:40,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:55:40,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:40,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:55:40,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:55:40,349 INFO L87 Difference]: Start difference. First operand 10979 states and 36721 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:41,867 INFO L93 Difference]: Finished difference Result 13498 states and 43973 transitions. [2021-06-05 15:55:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:55:41,868 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:41,889 INFO L225 Difference]: With dead ends: 13498 [2021-06-05 15:55:41,889 INFO L226 Difference]: Without dead ends: 13410 [2021-06-05 15:55:41,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1750.3ms TimeCoverageRelationStatistics Valid=463, Invalid=2843, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:55:41,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13410 states. [2021-06-05 15:55:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13410 to 11003. [2021-06-05 15:55:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11003 states, 11002 states have (on average 3.3449372841301583) internal successors, (36801), 11002 states have internal predecessors, (36801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11003 states to 11003 states and 36801 transitions. [2021-06-05 15:55:42,062 INFO L78 Accepts]: Start accepts. Automaton has 11003 states and 36801 transitions. Word has length 36 [2021-06-05 15:55:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:42,062 INFO L482 AbstractCegarLoop]: Abstraction has 11003 states and 36801 transitions. [2021-06-05 15:55:42,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:42,062 INFO L276 IsEmpty]: Start isEmpty. Operand 11003 states and 36801 transitions. [2021-06-05 15:55:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:42,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:42,075 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:42,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-05 15:55:42,289 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1350521119, now seen corresponding path program 125 times [2021-06-05 15:55:42,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:42,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789967219] [2021-06-05 15:55:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:42,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:42,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789967219] [2021-06-05 15:55:42,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789967219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:42,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113152744] [2021-06-05 15:55:42,654 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 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 [2021-06-05 15:55:42,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:55:42,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:42,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:55:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:43,089 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 15:55:43,727 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-05 15:55:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:43,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113152744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:43,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:43,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:55:43,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234620733] [2021-06-05 15:55:43,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:55:43,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:43,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:55:43,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:55:43,876 INFO L87 Difference]: Start difference. First operand 11003 states and 36801 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:46,268 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 15:55:46,531 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 15:55:46,782 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 15:55:46,949 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-05 15:55:47,135 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-05 15:55:47,368 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-05 15:55:47,567 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-06-05 15:55:47,765 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-05 15:55:47,997 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-06-05 15:55:48,267 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 15:55:48,499 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-06-05 15:55:48,735 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-05 15:55:49,085 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-06-05 15:55:49,225 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 38 [2021-06-05 15:55:49,377 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 41 [2021-06-05 15:55:49,649 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2021-06-05 15:55:49,837 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2021-06-05 15:55:50,016 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2021-06-05 15:55:50,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:50,308 INFO L93 Difference]: Finished difference Result 17246 states and 55714 transitions. [2021-06-05 15:55:50,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:55:50,309 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:50,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:50,335 INFO L225 Difference]: With dead ends: 17246 [2021-06-05 15:55:50,335 INFO L226 Difference]: Without dead ends: 17157 [2021-06-05 15:55:50,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 6349.0ms TimeCoverageRelationStatistics Valid=1239, Invalid=7881, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 15:55:50,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17157 states. [2021-06-05 15:55:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17157 to 11047. [2021-06-05 15:55:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11047 states, 11046 states have (on average 3.3455549520188304) internal successors, (36955), 11046 states have internal predecessors, (36955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11047 states to 11047 states and 36955 transitions. [2021-06-05 15:55:50,577 INFO L78 Accepts]: Start accepts. Automaton has 11047 states and 36955 transitions. Word has length 36 [2021-06-05 15:55:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:50,577 INFO L482 AbstractCegarLoop]: Abstraction has 11047 states and 36955 transitions. [2021-06-05 15:55:50,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 11047 states and 36955 transitions. [2021-06-05 15:55:50,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:50,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:50,590 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:50,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-05 15:55:50,793 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:50,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1828307351, now seen corresponding path program 126 times [2021-06-05 15:55:50,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:50,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107026465] [2021-06-05 15:55:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:51,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:51,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107026465] [2021-06-05 15:55:51,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107026465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:51,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459081134] [2021-06-05 15:55:51,104 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 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 [2021-06-05 15:55:51,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:55:51,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:51,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:55:51,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:51,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459081134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:51,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:51,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:55:51,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281141669] [2021-06-05 15:55:51,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:55:51,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:51,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:55:51,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:55:51,787 INFO L87 Difference]: Start difference. First operand 11047 states and 36955 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:53,688 INFO L93 Difference]: Finished difference Result 13682 states and 44967 transitions. [2021-06-05 15:55:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:55:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:53,713 INFO L225 Difference]: With dead ends: 13682 [2021-06-05 15:55:53,713 INFO L226 Difference]: Without dead ends: 13562 [2021-06-05 15:55:53,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1739.6ms TimeCoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:55:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13562 states. [2021-06-05 15:55:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13562 to 11055. [2021-06-05 15:55:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11055 states, 11054 states have (on average 3.345847656956758) internal successors, (36985), 11054 states have internal predecessors, (36985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11055 states to 11055 states and 36985 transitions. [2021-06-05 15:55:53,933 INFO L78 Accepts]: Start accepts. Automaton has 11055 states and 36985 transitions. Word has length 36 [2021-06-05 15:55:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:53,933 INFO L482 AbstractCegarLoop]: Abstraction has 11055 states and 36985 transitions. [2021-06-05 15:55:53,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:53,933 INFO L276 IsEmpty]: Start isEmpty. Operand 11055 states and 36985 transitions. [2021-06-05 15:55:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:53,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:53,947 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:54,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable989 [2021-06-05 15:55:54,147 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:54,148 INFO L82 PathProgramCache]: Analyzing trace with hash -555373643, now seen corresponding path program 127 times [2021-06-05 15:55:54,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:54,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600782518] [2021-06-05 15:55:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:54,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:54,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600782518] [2021-06-05 15:55:54,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600782518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:54,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086233503] [2021-06-05 15:55:54,487 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 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 [2021-06-05 15:55:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:54,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:55:54,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:55,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086233503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:55,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:55,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:55:55,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939395482] [2021-06-05 15:55:55,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:55:55,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:55,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:55:55,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:55:55,183 INFO L87 Difference]: Start difference. First operand 11055 states and 36985 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:57,026 INFO L93 Difference]: Finished difference Result 12746 states and 42062 transitions. [2021-06-05 15:55:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:55:57,026 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:57,049 INFO L225 Difference]: With dead ends: 12746 [2021-06-05 15:55:57,049 INFO L226 Difference]: Without dead ends: 12626 [2021-06-05 15:55:57,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1546.5ms TimeCoverageRelationStatistics Valid=403, Invalid=2353, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:55:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12626 states. [2021-06-05 15:55:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12626 to 11067. [2021-06-05 15:55:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11067 states, 11066 states have (on average 3.345653352611603) internal successors, (37023), 11066 states have internal predecessors, (37023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11067 states to 11067 states and 37023 transitions. [2021-06-05 15:55:57,269 INFO L78 Accepts]: Start accepts. Automaton has 11067 states and 37023 transitions. Word has length 36 [2021-06-05 15:55:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:57,269 INFO L482 AbstractCegarLoop]: Abstraction has 11067 states and 37023 transitions. [2021-06-05 15:55:57,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 11067 states and 37023 transitions. [2021-06-05 15:55:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:57,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:57,283 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:57,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-06-05 15:55:57,483 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:57,484 INFO L82 PathProgramCache]: Analyzing trace with hash -625483679, now seen corresponding path program 128 times [2021-06-05 15:55:57,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:57,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140937014] [2021-06-05 15:55:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:57,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:57,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140937014] [2021-06-05 15:55:57,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140937014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:57,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493709739] [2021-06-05 15:55:57,806 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 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 [2021-06-05 15:55:57,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:55:57,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:57,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:55:57,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:58,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493709739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:58,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:58,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:55:58,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274840376] [2021-06-05 15:55:58,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:55:58,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:58,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:55:58,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:55:58,479 INFO L87 Difference]: Start difference. First operand 11067 states and 37023 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:59,738 INFO L93 Difference]: Finished difference Result 12421 states and 41125 transitions. [2021-06-05 15:55:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:55:59,738 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:55:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:59,759 INFO L225 Difference]: With dead ends: 12421 [2021-06-05 15:55:59,759 INFO L226 Difference]: Without dead ends: 12301 [2021-06-05 15:55:59,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1480.1ms TimeCoverageRelationStatistics Valid=392, Invalid=2058, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:55:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12301 states. [2021-06-05 15:55:59,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 11071. [2021-06-05 15:55:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11071 states, 11070 states have (on average 3.345528455284553) internal successors, (37035), 11070 states have internal predecessors, (37035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11071 states to 11071 states and 37035 transitions. [2021-06-05 15:55:59,935 INFO L78 Accepts]: Start accepts. Automaton has 11071 states and 37035 transitions. Word has length 36 [2021-06-05 15:55:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:59,935 INFO L482 AbstractCegarLoop]: Abstraction has 11071 states and 37035 transitions. [2021-06-05 15:55:59,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:59,935 INFO L276 IsEmpty]: Start isEmpty. Operand 11071 states and 37035 transitions. [2021-06-05 15:55:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:55:59,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:59,948 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:00,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1012 [2021-06-05 15:56:00,148 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1410045579, now seen corresponding path program 129 times [2021-06-05 15:56:00,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:00,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718917674] [2021-06-05 15:56:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:00,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:00,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718917674] [2021-06-05 15:56:00,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718917674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:00,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896794567] [2021-06-05 15:56:00,504 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 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 [2021-06-05 15:56:00,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:56:00,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:00,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:56:00,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:01,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896794567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:01,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:01,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:56:01,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984241036] [2021-06-05 15:56:01,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:56:01,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:01,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:56:01,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:56:01,173 INFO L87 Difference]: Start difference. First operand 11071 states and 37035 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:03,907 INFO L93 Difference]: Finished difference Result 16445 states and 53005 transitions. [2021-06-05 15:56:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:56:03,907 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:03,930 INFO L225 Difference]: With dead ends: 16445 [2021-06-05 15:56:03,931 INFO L226 Difference]: Without dead ends: 16277 [2021-06-05 15:56:03,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 2520.1ms TimeCoverageRelationStatistics Valid=975, Invalid=4427, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:56:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16277 states. [2021-06-05 15:56:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16277 to 11152. [2021-06-05 15:56:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11152 states, 11151 states have (on average 3.347861178369653) internal successors, (37332), 11151 states have internal predecessors, (37332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11152 states to 11152 states and 37332 transitions. [2021-06-05 15:56:04,140 INFO L78 Accepts]: Start accepts. Automaton has 11152 states and 37332 transitions. Word has length 36 [2021-06-05 15:56:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:04,140 INFO L482 AbstractCegarLoop]: Abstraction has 11152 states and 37332 transitions. [2021-06-05 15:56:04,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 11152 states and 37332 transitions. [2021-06-05 15:56:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:04,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:04,155 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:04,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-06-05 15:56:04,356 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash 855388701, now seen corresponding path program 130 times [2021-06-05 15:56:04,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:04,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687267560] [2021-06-05 15:56:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:04,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:04,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687267560] [2021-06-05 15:56:04,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687267560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:04,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529155279] [2021-06-05 15:56:04,666 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 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 [2021-06-05 15:56:04,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:56:04,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:04,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:56:04,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:05,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529155279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:05,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:05,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:56:05,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649054188] [2021-06-05 15:56:05,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:56:05,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:05,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:56:05,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:56:05,374 INFO L87 Difference]: Start difference. First operand 11152 states and 37332 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:08,212 INFO L93 Difference]: Finished difference Result 16705 states and 53815 transitions. [2021-06-05 15:56:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:56:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:08,238 INFO L225 Difference]: With dead ends: 16705 [2021-06-05 15:56:08,238 INFO L226 Difference]: Without dead ends: 16527 [2021-06-05 15:56:08,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 2506.1ms TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:56:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16527 states. [2021-06-05 15:56:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16527 to 11192. [2021-06-05 15:56:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11192 states, 11191 states have (on average 3.348136895719775) internal successors, (37469), 11191 states have internal predecessors, (37469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11192 states to 11192 states and 37469 transitions. [2021-06-05 15:56:08,446 INFO L78 Accepts]: Start accepts. Automaton has 11192 states and 37469 transitions. Word has length 36 [2021-06-05 15:56:08,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:08,446 INFO L482 AbstractCegarLoop]: Abstraction has 11192 states and 37469 transitions. [2021-06-05 15:56:08,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 11192 states and 37469 transitions. [2021-06-05 15:56:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:08,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:08,459 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:08,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-05 15:56:08,660 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:08,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:08,660 INFO L82 PathProgramCache]: Analyzing trace with hash -963821215, now seen corresponding path program 131 times [2021-06-05 15:56:08,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:08,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518183736] [2021-06-05 15:56:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:08,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:08,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518183736] [2021-06-05 15:56:08,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518183736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:08,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198617319] [2021-06-05 15:56:08,977 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 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 [2021-06-05 15:56:09,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:56:09,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:09,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:56:09,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:09,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198617319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:09,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:09,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:56:09,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640589850] [2021-06-05 15:56:09,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:56:09,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:09,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:56:09,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:56:09,637 INFO L87 Difference]: Start difference. First operand 11192 states and 37469 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:10,887 INFO L93 Difference]: Finished difference Result 12536 states and 41555 transitions. [2021-06-05 15:56:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:56:10,887 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:10,907 INFO L225 Difference]: With dead ends: 12536 [2021-06-05 15:56:10,907 INFO L226 Difference]: Without dead ends: 12456 [2021-06-05 15:56:10,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1281.0ms TimeCoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:56:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12456 states. [2021-06-05 15:56:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12456 to 11180. [2021-06-05 15:56:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11180 states, 11179 states have (on average 3.3479738795956706) internal successors, (37427), 11179 states have internal predecessors, (37427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 37427 transitions. [2021-06-05 15:56:11,077 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 37427 transitions. Word has length 36 [2021-06-05 15:56:11,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:11,077 INFO L482 AbstractCegarLoop]: Abstraction has 11180 states and 37427 transitions. [2021-06-05 15:56:11,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:11,077 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 37427 transitions. [2021-06-05 15:56:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:11,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:11,090 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:11,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1045,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:11,291 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:11,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1461646837, now seen corresponding path program 132 times [2021-06-05 15:56:11,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:11,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474541261] [2021-06-05 15:56:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:11,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:11,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474541261] [2021-06-05 15:56:11,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474541261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:11,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675806888] [2021-06-05 15:56:11,617 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 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 [2021-06-05 15:56:11,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:56:11,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:11,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:56:11,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:12,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675806888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:12,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:12,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:56:12,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108338767] [2021-06-05 15:56:12,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:56:12,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:12,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:56:12,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:56:12,225 INFO L87 Difference]: Start difference. First operand 11180 states and 37427 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:14,570 INFO L93 Difference]: Finished difference Result 14457 states and 47364 transitions. [2021-06-05 15:56:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:56:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:14,592 INFO L225 Difference]: With dead ends: 14457 [2021-06-05 15:56:14,593 INFO L226 Difference]: Without dead ends: 14337 [2021-06-05 15:56:14,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1835.8ms TimeCoverageRelationStatistics Valid=529, Invalid=3377, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:56:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14337 states. [2021-06-05 15:56:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14337 to 11250. [2021-06-05 15:56:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11250 states, 11249 states have (on average 3.345808516312561) internal successors, (37637), 11249 states have internal predecessors, (37637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11250 states to 11250 states and 37637 transitions. [2021-06-05 15:56:14,774 INFO L78 Accepts]: Start accepts. Automaton has 11250 states and 37637 transitions. Word has length 36 [2021-06-05 15:56:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:14,774 INFO L482 AbstractCegarLoop]: Abstraction has 11250 states and 37637 transitions. [2021-06-05 15:56:14,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:14,774 INFO L276 IsEmpty]: Start isEmpty. Operand 11250 states and 37637 transitions. [2021-06-05 15:56:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:14,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:14,786 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:14,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:14,987 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:14,987 INFO L82 PathProgramCache]: Analyzing trace with hash 623719669, now seen corresponding path program 133 times [2021-06-05 15:56:14,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:14,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725690804] [2021-06-05 15:56:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:15,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:15,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725690804] [2021-06-05 15:56:15,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725690804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:15,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498341317] [2021-06-05 15:56:15,217 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 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 [2021-06-05 15:56:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:56:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:15,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498341317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:15,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:15,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:56:15,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998550358] [2021-06-05 15:56:15,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:56:15,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:15,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:56:15,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:56:15,809 INFO L87 Difference]: Start difference. First operand 11250 states and 37637 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:17,580 INFO L93 Difference]: Finished difference Result 12509 states and 40981 transitions. [2021-06-05 15:56:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:56:17,580 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:17,598 INFO L225 Difference]: With dead ends: 12509 [2021-06-05 15:56:17,598 INFO L226 Difference]: Without dead ends: 12309 [2021-06-05 15:56:17,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1561.8ms TimeCoverageRelationStatistics Valid=601, Invalid=3431, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:56:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12309 states. [2021-06-05 15:56:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12309 to 11218. [2021-06-05 15:56:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11218 states, 11217 states have (on average 3.3482214495854508) internal successors, (37557), 11217 states have internal predecessors, (37557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11218 states to 11218 states and 37557 transitions. [2021-06-05 15:56:17,771 INFO L78 Accepts]: Start accepts. Automaton has 11218 states and 37557 transitions. Word has length 36 [2021-06-05 15:56:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:17,771 INFO L482 AbstractCegarLoop]: Abstraction has 11218 states and 37557 transitions. [2021-06-05 15:56:17,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 11218 states and 37557 transitions. [2021-06-05 15:56:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:17,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:17,784 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:17,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1060 [2021-06-05 15:56:17,985 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:17,985 INFO L82 PathProgramCache]: Analyzing trace with hash 301799153, now seen corresponding path program 134 times [2021-06-05 15:56:17,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:17,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082458215] [2021-06-05 15:56:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:18,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:18,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082458215] [2021-06-05 15:56:18,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082458215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:18,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108467257] [2021-06-05 15:56:18,235 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 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 [2021-06-05 15:56:18,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:56:18,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:18,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:56:18,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:18,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108467257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:18,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:18,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:56:18,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357748746] [2021-06-05 15:56:18,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:56:18,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:18,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:56:18,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:56:18,782 INFO L87 Difference]: Start difference. First operand 11218 states and 37557 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:21,421 INFO L93 Difference]: Finished difference Result 12941 states and 42368 transitions. [2021-06-05 15:56:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:56:21,421 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:21,440 INFO L225 Difference]: With dead ends: 12941 [2021-06-05 15:56:21,440 INFO L226 Difference]: Without dead ends: 12710 [2021-06-05 15:56:21,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2001.5ms TimeCoverageRelationStatistics Valid=718, Invalid=4832, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:56:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2021-06-05 15:56:21,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 11268. [2021-06-05 15:56:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11268 states, 11267 states have (on average 3.3473861720067455) internal successors, (37715), 11267 states have internal predecessors, (37715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11268 states to 11268 states and 37715 transitions. [2021-06-05 15:56:21,617 INFO L78 Accepts]: Start accepts. Automaton has 11268 states and 37715 transitions. Word has length 36 [2021-06-05 15:56:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:21,617 INFO L482 AbstractCegarLoop]: Abstraction has 11268 states and 37715 transitions. [2021-06-05 15:56:21,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 11268 states and 37715 transitions. [2021-06-05 15:56:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:21,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:21,630 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:21,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:21,831 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:21,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:21,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1738497013, now seen corresponding path program 135 times [2021-06-05 15:56:21,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:21,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817713793] [2021-06-05 15:56:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:22,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:22,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817713793] [2021-06-05 15:56:22,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817713793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:22,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075776981] [2021-06-05 15:56:22,111 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 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 [2021-06-05 15:56:22,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:56:22,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:22,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:56:22,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:22,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075776981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:22,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:22,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-06-05 15:56:22,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295447126] [2021-06-05 15:56:22,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:56:22,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:56:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:56:22,709 INFO L87 Difference]: Start difference. First operand 11268 states and 37715 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:27,655 INFO L93 Difference]: Finished difference Result 16947 states and 54511 transitions. [2021-06-05 15:56:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 15:56:27,655 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:27,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:27,679 INFO L225 Difference]: With dead ends: 16947 [2021-06-05 15:56:27,679 INFO L226 Difference]: Without dead ends: 16668 [2021-06-05 15:56:27,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4075 ImplicationChecksByTransitivity, 3846.8ms TimeCoverageRelationStatistics Valid=1293, Invalid=11139, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 15:56:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16668 states. [2021-06-05 15:56:27,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16668 to 11286. [2021-06-05 15:56:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11286 states, 11285 states have (on average 3.347718210013292) internal successors, (37779), 11285 states have internal predecessors, (37779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11286 states to 11286 states and 37779 transitions. [2021-06-05 15:56:27,879 INFO L78 Accepts]: Start accepts. Automaton has 11286 states and 37779 transitions. Word has length 36 [2021-06-05 15:56:27,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:27,879 INFO L482 AbstractCegarLoop]: Abstraction has 11286 states and 37779 transitions. [2021-06-05 15:56:27,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 11286 states and 37779 transitions. [2021-06-05 15:56:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:27,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:27,893 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:28,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-06-05 15:56:28,093 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:28,094 INFO L82 PathProgramCache]: Analyzing trace with hash -386278499, now seen corresponding path program 136 times [2021-06-05 15:56:28,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:28,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913962350] [2021-06-05 15:56:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:28,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:28,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913962350] [2021-06-05 15:56:28,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913962350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:28,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75926346] [2021-06-05 15:56:28,407 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 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 [2021-06-05 15:56:28,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:56:28,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:28,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:56:28,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:29,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75926346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:29,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:29,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:56:29,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200143093] [2021-06-05 15:56:29,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:56:29,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:56:29,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:56:29,107 INFO L87 Difference]: Start difference. First operand 11286 states and 37779 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:30,841 INFO L93 Difference]: Finished difference Result 14432 states and 47377 transitions. [2021-06-05 15:56:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:56:30,842 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:30,862 INFO L225 Difference]: With dead ends: 14432 [2021-06-05 15:56:30,862 INFO L226 Difference]: Without dead ends: 14343 [2021-06-05 15:56:30,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1836.5ms TimeCoverageRelationStatistics Valid=581, Invalid=3451, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:56:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2021-06-05 15:56:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 11334. [2021-06-05 15:56:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11334 states, 11333 states have (on average 3.3490690902673608) internal successors, (37955), 11333 states have internal predecessors, (37955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11334 states to 11334 states and 37955 transitions. [2021-06-05 15:56:31,033 INFO L78 Accepts]: Start accepts. Automaton has 11334 states and 37955 transitions. Word has length 36 [2021-06-05 15:56:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:31,033 INFO L482 AbstractCegarLoop]: Abstraction has 11334 states and 37955 transitions. [2021-06-05 15:56:31,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 11334 states and 37955 transitions. [2021-06-05 15:56:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:31,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:31,046 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:31,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-06-05 15:56:31,246 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:31,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:31,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1224205667, now seen corresponding path program 137 times [2021-06-05 15:56:31,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:31,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568365841] [2021-06-05 15:56:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:31,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:31,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568365841] [2021-06-05 15:56:31,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568365841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:31,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829996009] [2021-06-05 15:56:31,471 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 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 [2021-06-05 15:56:31,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:56:31,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:31,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:56:31,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:32,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829996009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:32,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:32,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:56:32,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602464162] [2021-06-05 15:56:32,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:56:32,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:56:32,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:56:32,035 INFO L87 Difference]: Start difference. First operand 11334 states and 37955 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:34,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:34,090 INFO L93 Difference]: Finished difference Result 12417 states and 40850 transitions. [2021-06-05 15:56:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:56:34,090 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:34,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:34,106 INFO L225 Difference]: With dead ends: 12417 [2021-06-05 15:56:34,106 INFO L226 Difference]: Without dead ends: 12241 [2021-06-05 15:56:34,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1823.9ms TimeCoverageRelationStatistics Valid=790, Invalid=4322, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:56:34,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2021-06-05 15:56:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 11288. [2021-06-05 15:56:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11288 states, 11287 states have (on average 3.3512004961460087) internal successors, (37825), 11287 states have internal predecessors, (37825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11288 states to 11288 states and 37825 transitions. [2021-06-05 15:56:34,273 INFO L78 Accepts]: Start accepts. Automaton has 11288 states and 37825 transitions. Word has length 36 [2021-06-05 15:56:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:34,273 INFO L482 AbstractCegarLoop]: Abstraction has 11288 states and 37825 transitions. [2021-06-05 15:56:34,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 11288 states and 37825 transitions. [2021-06-05 15:56:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:34,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:34,286 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:34,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 15:56:34,486 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:34,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:34,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1902267487, now seen corresponding path program 138 times [2021-06-05 15:56:34,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:34,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093444454] [2021-06-05 15:56:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:34,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:34,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093444454] [2021-06-05 15:56:34,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093444454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:34,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850469832] [2021-06-05 15:56:34,829 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 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 [2021-06-05 15:56:34,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:56:34,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:34,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:56:34,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:35,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850469832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:35,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:35,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:56:35,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644569054] [2021-06-05 15:56:35,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:56:35,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:35,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:56:35,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:56:35,445 INFO L87 Difference]: Start difference. First operand 11288 states and 37825 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:39,351 INFO L93 Difference]: Finished difference Result 19538 states and 62921 transitions. [2021-06-05 15:56:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:56:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:39,384 INFO L225 Difference]: With dead ends: 19538 [2021-06-05 15:56:39,384 INFO L226 Difference]: Without dead ends: 19424 [2021-06-05 15:56:39,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2684 ImplicationChecksByTransitivity, 3430.2ms TimeCoverageRelationStatistics Valid=1306, Invalid=6884, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 15:56:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19424 states. [2021-06-05 15:56:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19424 to 11369. [2021-06-05 15:56:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11369 states, 11368 states have (on average 3.3516889514426462) internal successors, (38102), 11368 states have internal predecessors, (38102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11369 states to 11369 states and 38102 transitions. [2021-06-05 15:56:39,621 INFO L78 Accepts]: Start accepts. Automaton has 11369 states and 38102 transitions. Word has length 36 [2021-06-05 15:56:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:39,621 INFO L482 AbstractCegarLoop]: Abstraction has 11369 states and 38102 transitions. [2021-06-05 15:56:39,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 11369 states and 38102 transitions. [2021-06-05 15:56:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:39,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:39,636 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:39,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-06-05 15:56:39,837 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:39,837 INFO L82 PathProgramCache]: Analyzing trace with hash -484783711, now seen corresponding path program 139 times [2021-06-05 15:56:39,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:39,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977370126] [2021-06-05 15:56:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:40,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:40,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977370126] [2021-06-05 15:56:40,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977370126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:40,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623334722] [2021-06-05 15:56:40,082 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 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 [2021-06-05 15:56:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:56:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:40,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623334722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:40,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:40,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:56:40,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742905176] [2021-06-05 15:56:40,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:56:40,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:56:40,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:56:40,655 INFO L87 Difference]: Start difference. First operand 11369 states and 38102 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:43,404 INFO L93 Difference]: Finished difference Result 16547 states and 53487 transitions. [2021-06-05 15:56:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 15:56:43,409 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:43,437 INFO L225 Difference]: With dead ends: 16547 [2021-06-05 15:56:43,437 INFO L226 Difference]: Without dead ends: 16315 [2021-06-05 15:56:43,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2566 ImplicationChecksByTransitivity, 2444.6ms TimeCoverageRelationStatistics Valid=1155, Invalid=6855, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:56:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16315 states. [2021-06-05 15:56:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16315 to 11361. [2021-06-05 15:56:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11361 states, 11360 states have (on average 3.351232394366197) internal successors, (38070), 11360 states have internal predecessors, (38070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11361 states to 11361 states and 38070 transitions. [2021-06-05 15:56:43,644 INFO L78 Accepts]: Start accepts. Automaton has 11361 states and 38070 transitions. Word has length 36 [2021-06-05 15:56:43,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:43,644 INFO L482 AbstractCegarLoop]: Abstraction has 11361 states and 38070 transitions. [2021-06-05 15:56:43,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:43,644 INFO L276 IsEmpty]: Start isEmpty. Operand 11361 states and 38070 transitions. [2021-06-05 15:56:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:43,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:43,658 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:43,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:43,858 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:43,858 INFO L82 PathProgramCache]: Analyzing trace with hash 507709853, now seen corresponding path program 140 times [2021-06-05 15:56:43,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:43,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264055099] [2021-06-05 15:56:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:44,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:44,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264055099] [2021-06-05 15:56:44,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264055099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:44,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285933289] [2021-06-05 15:56:44,153 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 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 [2021-06-05 15:56:44,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:56:44,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:44,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:56:44,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:44,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285933289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:44,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:44,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:56:44,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560956014] [2021-06-05 15:56:44,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:56:44,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:44,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:56:44,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:56:44,701 INFO L87 Difference]: Start difference. First operand 11361 states and 38070 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:49,353 INFO L93 Difference]: Finished difference Result 17575 states and 56464 transitions. [2021-06-05 15:56:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 15:56:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:49,380 INFO L225 Difference]: With dead ends: 17575 [2021-06-05 15:56:49,381 INFO L226 Difference]: Without dead ends: 17288 [2021-06-05 15:56:49,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 3581.1ms TimeCoverageRelationStatistics Valid=1462, Invalid=10094, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 15:56:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17288 states. [2021-06-05 15:56:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17288 to 11297. [2021-06-05 15:56:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11297 states, 11296 states have (on average 3.3473796033994336) internal successors, (37812), 11296 states have internal predecessors, (37812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11297 states to 11297 states and 37812 transitions. [2021-06-05 15:56:49,603 INFO L78 Accepts]: Start accepts. Automaton has 11297 states and 37812 transitions. Word has length 36 [2021-06-05 15:56:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:49,603 INFO L482 AbstractCegarLoop]: Abstraction has 11297 states and 37812 transitions. [2021-06-05 15:56:49,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 11297 states and 37812 transitions. [2021-06-05 15:56:49,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:49,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:49,617 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:49,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:49,817 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:49,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:49,817 INFO L82 PathProgramCache]: Analyzing trace with hash -4354079, now seen corresponding path program 141 times [2021-06-05 15:56:49,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:49,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677088000] [2021-06-05 15:56:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:50,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:50,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677088000] [2021-06-05 15:56:50,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677088000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:50,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078488611] [2021-06-05 15:56:50,175 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 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 [2021-06-05 15:56:50,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:56:50,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:50,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:56:50,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:50,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078488611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:50,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:50,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:56:50,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598212670] [2021-06-05 15:56:50,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:56:50,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:56:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:56:50,784 INFO L87 Difference]: Start difference. First operand 11297 states and 37812 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:53,609 INFO L93 Difference]: Finished difference Result 20632 states and 67023 transitions. [2021-06-05 15:56:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:56:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:53,642 INFO L225 Difference]: With dead ends: 20632 [2021-06-05 15:56:53,643 INFO L226 Difference]: Without dead ends: 20488 [2021-06-05 15:56:53,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 2659.4ms TimeCoverageRelationStatistics Valid=1043, Invalid=4809, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:56:53,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20488 states. [2021-06-05 15:56:53,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20488 to 11271. [2021-06-05 15:56:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11271 states, 11270 states have (on average 3.345785270629991) internal successors, (37707), 11270 states have internal predecessors, (37707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11271 states to 11271 states and 37707 transitions. [2021-06-05 15:56:53,878 INFO L78 Accepts]: Start accepts. Automaton has 11271 states and 37707 transitions. Word has length 36 [2021-06-05 15:56:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:53,878 INFO L482 AbstractCegarLoop]: Abstraction has 11271 states and 37707 transitions. [2021-06-05 15:56:53,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 11271 states and 37707 transitions. [2021-06-05 15:56:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:53,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:53,892 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:54,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1101,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:54,093 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:54,093 INFO L82 PathProgramCache]: Analyzing trace with hash 720683361, now seen corresponding path program 142 times [2021-06-05 15:56:54,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:54,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847083962] [2021-06-05 15:56:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:54,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:54,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847083962] [2021-06-05 15:56:54,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847083962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:54,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061101439] [2021-06-05 15:56:54,418 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 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 [2021-06-05 15:56:54,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:56:54,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:56:54,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:55,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061101439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:55,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:55,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:56:55,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476975159] [2021-06-05 15:56:55,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:56:55,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:55,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:56:55,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:56:55,034 INFO L87 Difference]: Start difference. First operand 11271 states and 37707 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:56,687 INFO L93 Difference]: Finished difference Result 15161 states and 49899 transitions. [2021-06-05 15:56:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:56:56,687 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:56:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:56,711 INFO L225 Difference]: With dead ends: 15161 [2021-06-05 15:56:56,712 INFO L226 Difference]: Without dead ends: 15041 [2021-06-05 15:56:56,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1471.5ms TimeCoverageRelationStatistics Valid=516, Invalid=2346, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:56:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15041 states. [2021-06-05 15:56:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15041 to 11267. [2021-06-05 15:56:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11267 states, 11266 states have (on average 3.3459080418959704) internal successors, (37695), 11266 states have internal predecessors, (37695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11267 states to 11267 states and 37695 transitions. [2021-06-05 15:56:56,903 INFO L78 Accepts]: Start accepts. Automaton has 11267 states and 37695 transitions. Word has length 36 [2021-06-05 15:56:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:56,903 INFO L482 AbstractCegarLoop]: Abstraction has 11267 states and 37695 transitions. [2021-06-05 15:56:56,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 11267 states and 37695 transitions. [2021-06-05 15:56:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:56:56,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:56,915 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:57,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-06-05 15:56:57,116 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash -852237963, now seen corresponding path program 143 times [2021-06-05 15:56:57,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:57,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338061561] [2021-06-05 15:56:57,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:57,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:57,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338061561] [2021-06-05 15:56:57,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338061561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:57,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309006747] [2021-06-05 15:56:57,334 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 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 [2021-06-05 15:56:57,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:56:57,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:57,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:56:57,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:57,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309006747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:57,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:57,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:56:57,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395001719] [2021-06-05 15:56:57,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:56:57,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:57,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:56:57,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:56:57,924 INFO L87 Difference]: Start difference. First operand 11267 states and 37695 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:00,237 INFO L93 Difference]: Finished difference Result 13598 states and 44373 transitions. [2021-06-05 15:57:00,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:57:00,237 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:00,260 INFO L225 Difference]: With dead ends: 13598 [2021-06-05 15:57:00,261 INFO L226 Difference]: Without dead ends: 13285 [2021-06-05 15:57:00,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 1876.9ms TimeCoverageRelationStatistics Valid=849, Invalid=4553, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:57:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13285 states. [2021-06-05 15:57:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13285 to 11259. [2021-06-05 15:57:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11259 states, 11258 states have (on average 3.346686800497424) internal successors, (37677), 11258 states have internal predecessors, (37677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11259 states to 11259 states and 37677 transitions. [2021-06-05 15:57:00,462 INFO L78 Accepts]: Start accepts. Automaton has 11259 states and 37677 transitions. Word has length 36 [2021-06-05 15:57:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:00,462 INFO L482 AbstractCegarLoop]: Abstraction has 11259 states and 37677 transitions. [2021-06-05 15:57:00,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:00,462 INFO L276 IsEmpty]: Start isEmpty. Operand 11259 states and 37677 transitions. [2021-06-05 15:57:00,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:00,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:00,476 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:00,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1118 [2021-06-05 15:57:00,676 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:00,676 INFO L82 PathProgramCache]: Analyzing trace with hash -63878539, now seen corresponding path program 144 times [2021-06-05 15:57:00,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:00,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331120396] [2021-06-05 15:57:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:00,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:00,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331120396] [2021-06-05 15:57:00,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331120396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:00,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138975711] [2021-06-05 15:57:00,942 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 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 [2021-06-05 15:57:00,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:57:00,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:00,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:57:00,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:01,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138975711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:01,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:01,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:57:01,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267830209] [2021-06-05 15:57:01,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:57:01,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:01,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:57:01,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:57:01,457 INFO L87 Difference]: Start difference. First operand 11259 states and 37677 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:04,292 INFO L93 Difference]: Finished difference Result 16239 states and 52443 transitions. [2021-06-05 15:57:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:57:04,292 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:04,317 INFO L225 Difference]: With dead ends: 16239 [2021-06-05 15:57:04,317 INFO L226 Difference]: Without dead ends: 16041 [2021-06-05 15:57:04,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 2312.3ms TimeCoverageRelationStatistics Valid=1007, Invalid=5155, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:57:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16041 states. [2021-06-05 15:57:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16041 to 11281. [2021-06-05 15:57:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11281 states, 11280 states have (on average 3.3474290780141844) internal successors, (37759), 11280 states have internal predecessors, (37759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11281 states to 11281 states and 37759 transitions. [2021-06-05 15:57:04,529 INFO L78 Accepts]: Start accepts. Automaton has 11281 states and 37759 transitions. Word has length 36 [2021-06-05 15:57:04,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:04,529 INFO L482 AbstractCegarLoop]: Abstraction has 11281 states and 37759 transitions. [2021-06-05 15:57:04,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 11281 states and 37759 transitions. [2021-06-05 15:57:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:04,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:04,543 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:04,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-06-05 15:57:04,749 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2093411555, now seen corresponding path program 145 times [2021-06-05 15:57:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:04,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911872533] [2021-06-05 15:57:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:04,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:04,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911872533] [2021-06-05 15:57:04,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911872533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:04,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247787649] [2021-06-05 15:57:04,977 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 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 [2021-06-05 15:57:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:04,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:57:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:05,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247787649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:05,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:05,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:57:05,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184493124] [2021-06-05 15:57:05,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:57:05,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:57:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:57:05,531 INFO L87 Difference]: Start difference. First operand 11281 states and 37759 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:08,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:08,132 INFO L93 Difference]: Finished difference Result 16777 states and 54183 transitions. [2021-06-05 15:57:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:57:08,133 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:08,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:08,160 INFO L225 Difference]: With dead ends: 16777 [2021-06-05 15:57:08,160 INFO L226 Difference]: Without dead ends: 16575 [2021-06-05 15:57:08,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2322.8ms TimeCoverageRelationStatistics Valid=1047, Invalid=4959, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:57:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16575 states. [2021-06-05 15:57:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16575 to 11178. [2021-06-05 15:57:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11178 states, 11177 states have (on average 3.34633622617876) internal successors, (37402), 11177 states have internal predecessors, (37402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11178 states to 11178 states and 37402 transitions. [2021-06-05 15:57:08,373 INFO L78 Accepts]: Start accepts. Automaton has 11178 states and 37402 transitions. Word has length 36 [2021-06-05 15:57:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:08,373 INFO L482 AbstractCegarLoop]: Abstraction has 11178 states and 37402 transitions. [2021-06-05 15:57:08,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 11178 states and 37402 transitions. [2021-06-05 15:57:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:08,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:08,386 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:08,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1126 [2021-06-05 15:57:08,587 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:08,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:08,587 INFO L82 PathProgramCache]: Analyzing trace with hash 851216925, now seen corresponding path program 146 times [2021-06-05 15:57:08,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:08,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707372095] [2021-06-05 15:57:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:08,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:08,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707372095] [2021-06-05 15:57:08,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707372095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:08,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290075911] [2021-06-05 15:57:08,802 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 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 [2021-06-05 15:57:08,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:57:08,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:08,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:57:08,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:09,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290075911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:09,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:09,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:57:09,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708910353] [2021-06-05 15:57:09,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:57:09,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:09,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:57:09,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:57:09,326 INFO L87 Difference]: Start difference. First operand 11178 states and 37402 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:10,676 INFO L93 Difference]: Finished difference Result 17045 states and 56033 transitions. [2021-06-05 15:57:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:57:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:10,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:10,703 INFO L225 Difference]: With dead ends: 17045 [2021-06-05 15:57:10,703 INFO L226 Difference]: Without dead ends: 16965 [2021-06-05 15:57:10,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1176.6ms TimeCoverageRelationStatistics Valid=499, Invalid=2257, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:57:10,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16965 states. [2021-06-05 15:57:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16965 to 11135. [2021-06-05 15:57:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11135 states, 11134 states have (on average 3.34560804742231) internal successors, (37250), 11134 states have internal predecessors, (37250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11135 states to 11135 states and 37250 transitions. [2021-06-05 15:57:10,945 INFO L78 Accepts]: Start accepts. Automaton has 11135 states and 37250 transitions. Word has length 36 [2021-06-05 15:57:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:10,946 INFO L482 AbstractCegarLoop]: Abstraction has 11135 states and 37250 transitions. [2021-06-05 15:57:10,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand 11135 states and 37250 transitions. [2021-06-05 15:57:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:10,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:10,959 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:11,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1130,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:11,159 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:11,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:11,159 INFO L82 PathProgramCache]: Analyzing trace with hash 805896121, now seen corresponding path program 147 times [2021-06-05 15:57:11,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:11,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877518913] [2021-06-05 15:57:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:11,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877518913] [2021-06-05 15:57:11,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877518913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651023144] [2021-06-05 15:57:11,442 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 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 [2021-06-05 15:57:11,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:57:11,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:11,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:11,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:11,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651023144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:11,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:11,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:57:11,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77795361] [2021-06-05 15:57:11,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:57:11,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:11,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:57:11,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:57:11,939 INFO L87 Difference]: Start difference. First operand 11135 states and 37250 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:13,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:13,346 INFO L93 Difference]: Finished difference Result 12630 states and 41581 transitions. [2021-06-05 15:57:13,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:57:13,346 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:13,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:13,367 INFO L225 Difference]: With dead ends: 12630 [2021-06-05 15:57:13,367 INFO L226 Difference]: Without dead ends: 12437 [2021-06-05 15:57:13,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1361.0ms TimeCoverageRelationStatistics Valid=418, Invalid=2552, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:57:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12437 states. [2021-06-05 15:57:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12437 to 11095. [2021-06-05 15:57:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11095 states, 11094 states have (on average 3.3466738777717686) internal successors, (37128), 11094 states have internal predecessors, (37128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11095 states to 11095 states and 37128 transitions. [2021-06-05 15:57:13,610 INFO L78 Accepts]: Start accepts. Automaton has 11095 states and 37128 transitions. Word has length 36 [2021-06-05 15:57:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:13,610 INFO L482 AbstractCegarLoop]: Abstraction has 11095 states and 37128 transitions. [2021-06-05 15:57:13,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 11095 states and 37128 transitions. [2021-06-05 15:57:13,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:13,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:13,624 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:13,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 15:57:13,824 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:13,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1758168477, now seen corresponding path program 148 times [2021-06-05 15:57:13,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:13,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681305138] [2021-06-05 15:57:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:14,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:14,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681305138] [2021-06-05 15:57:14,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681305138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:14,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155196564] [2021-06-05 15:57:14,042 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 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 [2021-06-05 15:57:14,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:57:14,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:14,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:57:14,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:14,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155196564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:14,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:14,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:57:14,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083469491] [2021-06-05 15:57:14,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:57:14,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:14,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:57:14,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:57:14,610 INFO L87 Difference]: Start difference. First operand 11095 states and 37128 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:16,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:16,252 INFO L93 Difference]: Finished difference Result 18660 states and 61077 transitions. [2021-06-05 15:57:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:57:16,253 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:16,282 INFO L225 Difference]: With dead ends: 18660 [2021-06-05 15:57:16,282 INFO L226 Difference]: Without dead ends: 18580 [2021-06-05 15:57:16,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1259.5ms TimeCoverageRelationStatistics Valid=531, Invalid=2549, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:57:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18580 states. [2021-06-05 15:57:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18580 to 11219. [2021-06-05 15:57:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11219 states, 11218 states have (on average 3.345872704581922) internal successors, (37534), 11218 states have internal predecessors, (37534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 37534 transitions. [2021-06-05 15:57:16,590 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 37534 transitions. Word has length 36 [2021-06-05 15:57:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:16,590 INFO L482 AbstractCegarLoop]: Abstraction has 11219 states and 37534 transitions. [2021-06-05 15:57:16,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 37534 transitions. [2021-06-05 15:57:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:16,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:16,604 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:16,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:16,804 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:16,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:16,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1371012593, now seen corresponding path program 149 times [2021-06-05 15:57:16,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:16,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987322577] [2021-06-05 15:57:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:17,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:17,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987322577] [2021-06-05 15:57:17,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987322577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:17,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707960228] [2021-06-05 15:57:17,023 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 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 [2021-06-05 15:57:17,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:57:17,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:57:17,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:17,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707960228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:17,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:17,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:57:17,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164974004] [2021-06-05 15:57:17,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:57:17,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:17,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:57:17,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:57:17,616 INFO L87 Difference]: Start difference. First operand 11219 states and 37534 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:19,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:19,731 INFO L93 Difference]: Finished difference Result 19190 states and 62860 transitions. [2021-06-05 15:57:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:57:19,731 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:19,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:19,763 INFO L225 Difference]: With dead ends: 19190 [2021-06-05 15:57:19,763 INFO L226 Difference]: Without dead ends: 19110 [2021-06-05 15:57:19,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1694.5ms TimeCoverageRelationStatistics Valid=707, Invalid=3715, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:57:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19110 states. [2021-06-05 15:57:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19110 to 11293. [2021-06-05 15:57:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11293 states, 11292 states have (on average 3.34643995749203) internal successors, (37788), 11292 states have internal predecessors, (37788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11293 states to 11293 states and 37788 transitions. [2021-06-05 15:57:20,041 INFO L78 Accepts]: Start accepts. Automaton has 11293 states and 37788 transitions. Word has length 36 [2021-06-05 15:57:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:20,041 INFO L482 AbstractCegarLoop]: Abstraction has 11293 states and 37788 transitions. [2021-06-05 15:57:20,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 11293 states and 37788 transitions. [2021-06-05 15:57:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:20,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:20,055 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:20,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:20,255 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1839999759, now seen corresponding path program 150 times [2021-06-05 15:57:20,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:20,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27346295] [2021-06-05 15:57:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:20,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:20,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27346295] [2021-06-05 15:57:20,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27346295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:20,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707675241] [2021-06-05 15:57:20,524 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 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 [2021-06-05 15:57:20,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:57:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:20,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:57:20,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:21,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707675241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:21,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:21,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:57:21,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231043706] [2021-06-05 15:57:21,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:57:21,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:21,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:57:21,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:57:21,197 INFO L87 Difference]: Start difference. First operand 11293 states and 37788 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:23,780 INFO L93 Difference]: Finished difference Result 21695 states and 69593 transitions. [2021-06-05 15:57:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:57:23,780 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:23,812 INFO L225 Difference]: With dead ends: 21695 [2021-06-05 15:57:23,812 INFO L226 Difference]: Without dead ends: 21551 [2021-06-05 15:57:23,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 2261.7ms TimeCoverageRelationStatistics Valid=1057, Invalid=4493, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:57:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21551 states. [2021-06-05 15:57:24,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21551 to 11339. [2021-06-05 15:57:24,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11339 states, 11338 states have (on average 3.347062974069501) internal successors, (37949), 11338 states have internal predecessors, (37949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11339 states to 11339 states and 37949 transitions. [2021-06-05 15:57:24,075 INFO L78 Accepts]: Start accepts. Automaton has 11339 states and 37949 transitions. Word has length 36 [2021-06-05 15:57:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:24,075 INFO L482 AbstractCegarLoop]: Abstraction has 11339 states and 37949 transitions. [2021-06-05 15:57:24,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 11339 states and 37949 transitions. [2021-06-05 15:57:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:24,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:24,089 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:24,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-06-05 15:57:24,290 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:24,290 INFO L82 PathProgramCache]: Analyzing trace with hash -555858699, now seen corresponding path program 151 times [2021-06-05 15:57:24,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:24,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881051457] [2021-06-05 15:57:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:24,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:24,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881051457] [2021-06-05 15:57:24,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881051457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:24,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403408385] [2021-06-05 15:57:24,572 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 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 [2021-06-05 15:57:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:24,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:57:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:25,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403408385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:25,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:25,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:57:25,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147960202] [2021-06-05 15:57:25,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:57:25,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:25,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:57:25,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:57:25,349 INFO L87 Difference]: Start difference. First operand 11339 states and 37949 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:29,709 INFO L93 Difference]: Finished difference Result 21691 states and 69332 transitions. [2021-06-05 15:57:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 15:57:29,709 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:29,746 INFO L225 Difference]: With dead ends: 21691 [2021-06-05 15:57:29,746 INFO L226 Difference]: Without dead ends: 21551 [2021-06-05 15:57:29,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 3768.8ms TimeCoverageRelationStatistics Valid=1867, Invalid=9475, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 15:57:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21551 states. [2021-06-05 15:57:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21551 to 11261. [2021-06-05 15:57:30,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11261 states, 11260 states have (on average 3.3429840142095917) internal successors, (37642), 11260 states have internal predecessors, (37642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11261 states to 11261 states and 37642 transitions. [2021-06-05 15:57:30,030 INFO L78 Accepts]: Start accepts. Automaton has 11261 states and 37642 transitions. Word has length 36 [2021-06-05 15:57:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:30,030 INFO L482 AbstractCegarLoop]: Abstraction has 11261 states and 37642 transitions. [2021-06-05 15:57:30,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 11261 states and 37642 transitions. [2021-06-05 15:57:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:30,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:30,045 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:30,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-06-05 15:57:30,245 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:30,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:30,246 INFO L82 PathProgramCache]: Analyzing trace with hash 365843441, now seen corresponding path program 152 times [2021-06-05 15:57:30,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:30,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687791181] [2021-06-05 15:57:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:30,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:30,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687791181] [2021-06-05 15:57:30,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687791181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:30,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472675749] [2021-06-05 15:57:30,533 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 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 [2021-06-05 15:57:30,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:57:30,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:30,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:57:30,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:31,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472675749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:31,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:31,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 15:57:31,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043769125] [2021-06-05 15:57:31,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:57:31,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:31,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:57:31,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:57:31,250 INFO L87 Difference]: Start difference. First operand 11261 states and 37642 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:35,953 INFO L93 Difference]: Finished difference Result 22170 states and 70997 transitions. [2021-06-05 15:57:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 15:57:35,954 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:35,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:35,990 INFO L225 Difference]: With dead ends: 22170 [2021-06-05 15:57:35,990 INFO L226 Difference]: Without dead ends: 22023 [2021-06-05 15:57:35,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 4099.3ms TimeCoverageRelationStatistics Valid=1849, Invalid=9707, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 15:57:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22023 states. [2021-06-05 15:57:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22023 to 11059. [2021-06-05 15:57:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11059 states, 11058 states have (on average 3.3411105082293364) internal successors, (36946), 11058 states have internal predecessors, (36946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11059 states to 11059 states and 36946 transitions. [2021-06-05 15:57:36,249 INFO L78 Accepts]: Start accepts. Automaton has 11059 states and 36946 transitions. Word has length 36 [2021-06-05 15:57:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:36,249 INFO L482 AbstractCegarLoop]: Abstraction has 11059 states and 36946 transitions. [2021-06-05 15:57:36,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 11059 states and 36946 transitions. [2021-06-05 15:57:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:36,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:36,262 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:36,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1201 [2021-06-05 15:57:36,463 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:36,463 INFO L82 PathProgramCache]: Analyzing trace with hash 160293389, now seen corresponding path program 153 times [2021-06-05 15:57:36,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:36,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742452941] [2021-06-05 15:57:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:36,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:36,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742452941] [2021-06-05 15:57:36,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742452941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:36,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770987203] [2021-06-05 15:57:36,723 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 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 [2021-06-05 15:57:36,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:57:36,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:36,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:57:36,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:37,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770987203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:37,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:37,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:57:37,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412484822] [2021-06-05 15:57:37,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:57:37,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:37,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:57:37,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:57:37,465 INFO L87 Difference]: Start difference. First operand 11059 states and 36946 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:39,981 INFO L93 Difference]: Finished difference Result 21001 states and 67476 transitions. [2021-06-05 15:57:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:57:39,982 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:40,017 INFO L225 Difference]: With dead ends: 21001 [2021-06-05 15:57:40,017 INFO L226 Difference]: Without dead ends: 20857 [2021-06-05 15:57:40,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 2305.7ms TimeCoverageRelationStatistics Valid=1042, Invalid=4360, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:57:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20857 states. [2021-06-05 15:57:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20857 to 11071. [2021-06-05 15:57:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11071 states, 11070 states have (on average 3.3383920505871725) internal successors, (36956), 11070 states have internal predecessors, (36956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11071 states to 11071 states and 36956 transitions. [2021-06-05 15:57:40,265 INFO L78 Accepts]: Start accepts. Automaton has 11071 states and 36956 transitions. Word has length 36 [2021-06-05 15:57:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:40,265 INFO L482 AbstractCegarLoop]: Abstraction has 11071 states and 36956 transitions. [2021-06-05 15:57:40,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 11071 states and 36956 transitions. [2021-06-05 15:57:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:40,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:40,278 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:40,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1213 [2021-06-05 15:57:40,478 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:40,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:40,479 INFO L82 PathProgramCache]: Analyzing trace with hash 33738725, now seen corresponding path program 154 times [2021-06-05 15:57:40,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:40,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782333044] [2021-06-05 15:57:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:40,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:40,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782333044] [2021-06-05 15:57:40,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782333044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:40,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881519828] [2021-06-05 15:57:40,717 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 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 [2021-06-05 15:57:40,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:57:40,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:40,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:40,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:41,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881519828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:41,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:41,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:57:41,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221896070] [2021-06-05 15:57:41,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:57:41,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:41,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:57:41,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:57:41,468 INFO L87 Difference]: Start difference. First operand 11071 states and 36956 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:43,962 INFO L93 Difference]: Finished difference Result 16954 states and 55580 transitions. [2021-06-05 15:57:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:57:43,962 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:43,989 INFO L225 Difference]: With dead ends: 16954 [2021-06-05 15:57:43,989 INFO L226 Difference]: Without dead ends: 16859 [2021-06-05 15:57:43,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 2038.0ms TimeCoverageRelationStatistics Valid=677, Invalid=3879, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:57:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16859 states. [2021-06-05 15:57:44,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16859 to 11161. [2021-06-05 15:57:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11161 states, 11160 states have (on average 3.338172043010753) internal successors, (37254), 11160 states have internal predecessors, (37254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11161 states to 11161 states and 37254 transitions. [2021-06-05 15:57:44,191 INFO L78 Accepts]: Start accepts. Automaton has 11161 states and 37254 transitions. Word has length 36 [2021-06-05 15:57:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:44,191 INFO L482 AbstractCegarLoop]: Abstraction has 11161 states and 37254 transitions. [2021-06-05 15:57:44,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 11161 states and 37254 transitions. [2021-06-05 15:57:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:44,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:44,204 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:44,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1225,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:44,404 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:44,404 INFO L82 PathProgramCache]: Analyzing trace with hash 955440865, now seen corresponding path program 155 times [2021-06-05 15:57:44,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:44,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479731554] [2021-06-05 15:57:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:44,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479731554] [2021-06-05 15:57:44,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479731554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120936409] [2021-06-05 15:57:44,644 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 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 [2021-06-05 15:57:44,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:57:44,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:44,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:57:44,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:45,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120936409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:45,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:45,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:57:45,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785688168] [2021-06-05 15:57:45,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:57:45,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:45,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:57:45,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:57:45,352 INFO L87 Difference]: Start difference. First operand 11161 states and 37254 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:47,022 INFO L93 Difference]: Finished difference Result 18115 states and 58822 transitions. [2021-06-05 15:57:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:57:47,023 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:47,053 INFO L225 Difference]: With dead ends: 18115 [2021-06-05 15:57:47,053 INFO L226 Difference]: Without dead ends: 17995 [2021-06-05 15:57:47,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1441.0ms TimeCoverageRelationStatistics Valid=478, Invalid=2384, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:57:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17995 states. [2021-06-05 15:57:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17995 to 11155. [2021-06-05 15:57:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 11154 states have (on average 3.3381746458669537) internal successors, (37234), 11154 states have internal predecessors, (37234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 37234 transitions. [2021-06-05 15:57:47,281 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 37234 transitions. Word has length 36 [2021-06-05 15:57:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:47,281 INFO L482 AbstractCegarLoop]: Abstraction has 11155 states and 37234 transitions. [2021-06-05 15:57:47,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 37234 transitions. [2021-06-05 15:57:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:47,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:47,296 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:47,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1237 [2021-06-05 15:57:47,496 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:47,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:47,496 INFO L82 PathProgramCache]: Analyzing trace with hash 885330829, now seen corresponding path program 156 times [2021-06-05 15:57:47,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:47,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104787035] [2021-06-05 15:57:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:47,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:47,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104787035] [2021-06-05 15:57:47,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104787035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:47,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377203755] [2021-06-05 15:57:47,740 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 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 [2021-06-05 15:57:47,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:57:47,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:47,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:47,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:48,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377203755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:48,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:48,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:57:48,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846519703] [2021-06-05 15:57:48,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:57:48,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:48,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:57:48,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:57:48,401 INFO L87 Difference]: Start difference. First operand 11155 states and 37234 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:50,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:50,135 INFO L93 Difference]: Finished difference Result 19686 states and 64539 transitions. [2021-06-05 15:57:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:57:50,135 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:50,167 INFO L225 Difference]: With dead ends: 19686 [2021-06-05 15:57:50,167 INFO L226 Difference]: Without dead ends: 19566 [2021-06-05 15:57:50,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1674.3ms TimeCoverageRelationStatistics Valid=562, Invalid=2630, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:57:50,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19566 states. [2021-06-05 15:57:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19566 to 11147. [2021-06-05 15:57:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11147 states, 11146 states have (on average 3.3384173694598958) internal successors, (37210), 11146 states have internal predecessors, (37210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 37210 transitions. [2021-06-05 15:57:50,405 INFO L78 Accepts]: Start accepts. Automaton has 11147 states and 37210 transitions. Word has length 36 [2021-06-05 15:57:50,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:50,405 INFO L482 AbstractCegarLoop]: Abstraction has 11147 states and 37210 transitions. [2021-06-05 15:57:50,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:50,405 INFO L276 IsEmpty]: Start isEmpty. Operand 11147 states and 37210 transitions. [2021-06-05 15:57:50,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:50,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:50,419 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:50,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1244,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:50,623 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:50,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:50,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1648635209, now seen corresponding path program 157 times [2021-06-05 15:57:50,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:50,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937945432] [2021-06-05 15:57:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:50,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:50,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937945432] [2021-06-05 15:57:50,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937945432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:50,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965169881] [2021-06-05 15:57:50,872 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 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 [2021-06-05 15:57:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:50,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:57:50,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:51,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965169881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:51,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:51,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:57:51,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394271318] [2021-06-05 15:57:51,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:57:51,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:51,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:57:51,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:57:51,657 INFO L87 Difference]: Start difference. First operand 11147 states and 37210 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:53,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:53,583 INFO L93 Difference]: Finished difference Result 18416 states and 60517 transitions. [2021-06-05 15:57:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:57:53,584 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:53,618 INFO L225 Difference]: With dead ends: 18416 [2021-06-05 15:57:53,618 INFO L226 Difference]: Without dead ends: 18321 [2021-06-05 15:57:53,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1819.3ms TimeCoverageRelationStatistics Valid=615, Invalid=3417, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:57:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18321 states. [2021-06-05 15:57:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18321 to 11183. [2021-06-05 15:57:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11183 states, 11182 states have (on average 3.338579860490073) internal successors, (37332), 11182 states have internal predecessors, (37332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11183 states to 11183 states and 37332 transitions. [2021-06-05 15:57:53,857 INFO L78 Accepts]: Start accepts. Automaton has 11183 states and 37332 transitions. Word has length 36 [2021-06-05 15:57:53,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:53,857 INFO L482 AbstractCegarLoop]: Abstraction has 11183 states and 37332 transitions. [2021-06-05 15:57:53,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 11183 states and 37332 transitions. [2021-06-05 15:57:53,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:53,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:53,871 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:54,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-06-05 15:57:54,072 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:54,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:54,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1928764087, now seen corresponding path program 158 times [2021-06-05 15:57:54,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:54,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7594325] [2021-06-05 15:57:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:54,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:54,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7594325] [2021-06-05 15:57:54,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7594325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:54,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123885938] [2021-06-05 15:57:54,329 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 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 [2021-06-05 15:57:54,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:57:54,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:54,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:57:54,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:55,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123885938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:55,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:55,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:57:55,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664085249] [2021-06-05 15:57:55,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:57:55,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:55,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:57:55,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:57:55,016 INFO L87 Difference]: Start difference. First operand 11183 states and 37332 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:57,301 INFO L93 Difference]: Finished difference Result 22457 states and 73215 transitions. [2021-06-05 15:57:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:57:57,301 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:57:57,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:57,337 INFO L225 Difference]: With dead ends: 22457 [2021-06-05 15:57:57,337 INFO L226 Difference]: Without dead ends: 22313 [2021-06-05 15:57:57,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 2004.9ms TimeCoverageRelationStatistics Valid=703, Invalid=3587, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:57:57,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22313 states. [2021-06-05 15:57:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22313 to 11051. [2021-06-05 15:57:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11051 states, 11050 states have (on average 3.3337556561085973) internal successors, (36838), 11050 states have internal predecessors, (36838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11051 states to 11051 states and 36838 transitions. [2021-06-05 15:57:57,585 INFO L78 Accepts]: Start accepts. Automaton has 11051 states and 36838 transitions. Word has length 36 [2021-06-05 15:57:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:57,585 INFO L482 AbstractCegarLoop]: Abstraction has 11051 states and 36838 transitions. [2021-06-05 15:57:57,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 11051 states and 36838 transitions. [2021-06-05 15:57:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:57,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:57,597 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:57,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1268 [2021-06-05 15:57:57,798 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:57,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:57,798 INFO L82 PathProgramCache]: Analyzing trace with hash 546993293, now seen corresponding path program 159 times [2021-06-05 15:57:57,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:57,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416796533] [2021-06-05 15:57:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:58,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:58,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416796533] [2021-06-05 15:57:58,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416796533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:58,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422812559] [2021-06-05 15:57:58,025 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 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 [2021-06-05 15:57:58,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:57:58,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:58,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:58,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:58,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422812559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:58,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:58,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:57:58,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149747829] [2021-06-05 15:57:58,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:57:58,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:57:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:57:58,702 INFO L87 Difference]: Start difference. First operand 11051 states and 36838 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:00,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:00,549 INFO L93 Difference]: Finished difference Result 17392 states and 57477 transitions. [2021-06-05 15:58:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:58:00,549 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:00,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:00,577 INFO L225 Difference]: With dead ends: 17392 [2021-06-05 15:58:00,577 INFO L226 Difference]: Without dead ends: 17272 [2021-06-05 15:58:00,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1601.2ms TimeCoverageRelationStatistics Valid=529, Invalid=3131, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:58:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17272 states. [2021-06-05 15:58:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17272 to 11043. [2021-06-05 15:58:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11043 states, 11042 states have (on average 3.333997464227495) internal successors, (36814), 11042 states have internal predecessors, (36814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:00,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11043 states to 11043 states and 36814 transitions. [2021-06-05 15:58:00,806 INFO L78 Accepts]: Start accepts. Automaton has 11043 states and 36814 transitions. Word has length 36 [2021-06-05 15:58:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:00,806 INFO L482 AbstractCegarLoop]: Abstraction has 11043 states and 36814 transitions. [2021-06-05 15:58:00,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 11043 states and 36814 transitions. [2021-06-05 15:58:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:00,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:00,819 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:01,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1280 [2021-06-05 15:58:01,019 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:01,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1786449251, now seen corresponding path program 160 times [2021-06-05 15:58:01,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:01,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689541864] [2021-06-05 15:58:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:01,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:01,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689541864] [2021-06-05 15:58:01,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689541864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:01,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093136753] [2021-06-05 15:58:01,264 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 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 [2021-06-05 15:58:01,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:58:01,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:01,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:58:01,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:01,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093136753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:01,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:01,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:58:01,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475707223] [2021-06-05 15:58:01,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:58:01,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:01,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:58:01,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:58:01,983 INFO L87 Difference]: Start difference. First operand 11043 states and 36814 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:04,457 INFO L93 Difference]: Finished difference Result 18424 states and 60727 transitions. [2021-06-05 15:58:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:58:04,457 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:04,487 INFO L225 Difference]: With dead ends: 18424 [2021-06-05 15:58:04,487 INFO L226 Difference]: Without dead ends: 18304 [2021-06-05 15:58:04,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 2091.9ms TimeCoverageRelationStatistics Valid=695, Invalid=3465, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:58:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-06-05 15:58:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 11191. [2021-06-05 15:58:04,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11191 states, 11190 states have (on average 3.3335120643431635) internal successors, (37302), 11190 states have internal predecessors, (37302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:04,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11191 states to 11191 states and 37302 transitions. [2021-06-05 15:58:04,744 INFO L78 Accepts]: Start accepts. Automaton has 11191 states and 37302 transitions. Word has length 36 [2021-06-05 15:58:04,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:04,744 INFO L482 AbstractCegarLoop]: Abstraction has 11191 states and 37302 transitions. [2021-06-05 15:58:04,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:04,744 INFO L276 IsEmpty]: Start isEmpty. Operand 11191 states and 37302 transitions. [2021-06-05 15:58:04,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:04,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:04,757 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:04,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1292,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:04,958 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:04,958 INFO L82 PathProgramCache]: Analyzing trace with hash 207810913, now seen corresponding path program 161 times [2021-06-05 15:58:04,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:04,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644310248] [2021-06-05 15:58:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:05,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:05,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644310248] [2021-06-05 15:58:05,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644310248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:05,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993408330] [2021-06-05 15:58:05,292 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 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 [2021-06-05 15:58:05,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:58:05,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:05,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:58:05,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:05,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993408330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:05,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:05,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:58:05,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060138939] [2021-06-05 15:58:05,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:58:05,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:05,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:58:05,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:58:05,887 INFO L87 Difference]: Start difference. First operand 11191 states and 37302 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:08,969 INFO L93 Difference]: Finished difference Result 20352 states and 64972 transitions. [2021-06-05 15:58:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:58:08,969 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:08,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:08,998 INFO L225 Difference]: With dead ends: 20352 [2021-06-05 15:58:08,999 INFO L226 Difference]: Without dead ends: 20245 [2021-06-05 15:58:08,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 2740.0ms TimeCoverageRelationStatistics Valid=1011, Invalid=4841, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:58:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20245 states. [2021-06-05 15:58:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20245 to 11371. [2021-06-05 15:58:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11371 states, 11370 states have (on average 3.3333333333333335) internal successors, (37900), 11370 states have internal predecessors, (37900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11371 states to 11371 states and 37900 transitions. [2021-06-05 15:58:09,221 INFO L78 Accepts]: Start accepts. Automaton has 11371 states and 37900 transitions. Word has length 36 [2021-06-05 15:58:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:09,221 INFO L482 AbstractCegarLoop]: Abstraction has 11371 states and 37900 transitions. [2021-06-05 15:58:09,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 11371 states and 37900 transitions. [2021-06-05 15:58:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:09,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:09,234 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:09,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1304 [2021-06-05 15:58:09,435 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:09,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:09,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1491951973, now seen corresponding path program 162 times [2021-06-05 15:58:09,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:09,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951525838] [2021-06-05 15:58:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:09,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:09,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951525838] [2021-06-05 15:58:09,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951525838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:09,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563776577] [2021-06-05 15:58:09,710 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 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 [2021-06-05 15:58:09,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:58:09,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:09,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:58:09,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:10,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563776577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:10,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:10,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:58:10,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75982044] [2021-06-05 15:58:10,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:58:10,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:10,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:58:10,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:58:10,240 INFO L87 Difference]: Start difference. First operand 11371 states and 37900 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:14,964 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 15:58:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:15,892 INFO L93 Difference]: Finished difference Result 21226 states and 67124 transitions. [2021-06-05 15:58:15,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 15:58:15,892 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:15,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:15,923 INFO L225 Difference]: With dead ends: 21226 [2021-06-05 15:58:15,923 INFO L226 Difference]: Without dead ends: 20979 [2021-06-05 15:58:15,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 4631.9ms TimeCoverageRelationStatistics Valid=1866, Invalid=11706, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 15:58:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20979 states. [2021-06-05 15:58:16,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20979 to 11396. [2021-06-05 15:58:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11396 states, 11395 states have (on average 3.334971478718736) internal successors, (38002), 11395 states have internal predecessors, (38002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11396 states to 11396 states and 38002 transitions. [2021-06-05 15:58:16,171 INFO L78 Accepts]: Start accepts. Automaton has 11396 states and 38002 transitions. Word has length 36 [2021-06-05 15:58:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:16,171 INFO L482 AbstractCegarLoop]: Abstraction has 11396 states and 38002 transitions. [2021-06-05 15:58:16,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 11396 states and 38002 transitions. [2021-06-05 15:58:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:16,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:16,185 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:16,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1308,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:16,389 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:16,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:16,389 INFO L82 PathProgramCache]: Analyzing trace with hash -406577051, now seen corresponding path program 163 times [2021-06-05 15:58:16,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:16,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902606889] [2021-06-05 15:58:16,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:16,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:16,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902606889] [2021-06-05 15:58:16,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902606889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:16,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885046467] [2021-06-05 15:58:16,672 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 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 [2021-06-05 15:58:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:16,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:58:16,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:17,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885046467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:17,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:17,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:58:17,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106177320] [2021-06-05 15:58:17,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:58:17,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:17,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:58:17,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:58:17,311 INFO L87 Difference]: Start difference. First operand 11396 states and 38002 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:22,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:22,159 INFO L93 Difference]: Finished difference Result 21113 states and 66892 transitions. [2021-06-05 15:58:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 15:58:22,160 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:22,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:22,190 INFO L225 Difference]: With dead ends: 21113 [2021-06-05 15:58:22,190 INFO L226 Difference]: Without dead ends: 20928 [2021-06-05 15:58:22,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3909 ImplicationChecksByTransitivity, 4151.1ms TimeCoverageRelationStatistics Valid=1899, Invalid=9657, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 15:58:22,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20928 states. [2021-06-05 15:58:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20928 to 11436. [2021-06-05 15:58:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11436 states, 11435 states have (on average 3.336073458679493) internal successors, (38148), 11435 states have internal predecessors, (38148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11436 states to 11436 states and 38148 transitions. [2021-06-05 15:58:22,446 INFO L78 Accepts]: Start accepts. Automaton has 11436 states and 38148 transitions. Word has length 36 [2021-06-05 15:58:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:22,446 INFO L482 AbstractCegarLoop]: Abstraction has 11436 states and 38148 transitions. [2021-06-05 15:58:22,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 11436 states and 38148 transitions. [2021-06-05 15:58:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:22,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:22,460 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:22,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1312 [2021-06-05 15:58:22,660 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:22,660 INFO L82 PathProgramCache]: Analyzing trace with hash 515125089, now seen corresponding path program 164 times [2021-06-05 15:58:22,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:22,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201167081] [2021-06-05 15:58:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:22,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:22,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201167081] [2021-06-05 15:58:22,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201167081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:22,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073536038] [2021-06-05 15:58:22,941 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 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 [2021-06-05 15:58:22,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:58:22,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:58:22,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:23,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073536038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:23,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:23,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:58:23,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691613935] [2021-06-05 15:58:23,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:58:23,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:23,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:58:23,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:58:23,493 INFO L87 Difference]: Start difference. First operand 11436 states and 38148 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:28,682 INFO L93 Difference]: Finished difference Result 21255 states and 67401 transitions. [2021-06-05 15:58:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 15:58:28,683 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:28,715 INFO L225 Difference]: With dead ends: 21255 [2021-06-05 15:58:28,715 INFO L226 Difference]: Without dead ends: 20974 [2021-06-05 15:58:28,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4174 ImplicationChecksByTransitivity, 4334.0ms TimeCoverageRelationStatistics Valid=2087, Invalid=10123, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 15:58:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20974 states. [2021-06-05 15:58:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20974 to 11438. [2021-06-05 15:58:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11438 states, 11437 states have (on average 3.3360146891667397) internal successors, (38154), 11437 states have internal predecessors, (38154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11438 states to 11438 states and 38154 transitions. [2021-06-05 15:58:28,968 INFO L78 Accepts]: Start accepts. Automaton has 11438 states and 38154 transitions. Word has length 36 [2021-06-05 15:58:28,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:28,968 INFO L482 AbstractCegarLoop]: Abstraction has 11438 states and 38154 transitions. [2021-06-05 15:58:28,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 11438 states and 38154 transitions. [2021-06-05 15:58:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:28,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:28,981 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:29,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1316 [2021-06-05 15:58:29,181 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:29,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1318193907, now seen corresponding path program 165 times [2021-06-05 15:58:29,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:29,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450078874] [2021-06-05 15:58:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:29,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:29,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450078874] [2021-06-05 15:58:29,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450078874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:29,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229259626] [2021-06-05 15:58:29,575 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 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 [2021-06-05 15:58:29,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:58:29,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:29,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:58:29,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:30,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229259626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:30,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:30,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:58:30,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607437120] [2021-06-05 15:58:30,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:58:30,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:30,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:58:30,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:58:30,156 INFO L87 Difference]: Start difference. First operand 11438 states and 38154 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:33,314 INFO L93 Difference]: Finished difference Result 21744 states and 69783 transitions. [2021-06-05 15:58:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:58:33,314 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:33,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:33,348 INFO L225 Difference]: With dead ends: 21744 [2021-06-05 15:58:33,348 INFO L226 Difference]: Without dead ends: 21600 [2021-06-05 15:58:33,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2107 ImplicationChecksByTransitivity, 2894.1ms TimeCoverageRelationStatistics Valid=1139, Invalid=5341, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:58:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21600 states. [2021-06-05 15:58:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21600 to 11488. [2021-06-05 15:58:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11488 states, 11487 states have (on average 3.3368155305998086) internal successors, (38330), 11487 states have internal predecessors, (38330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11488 states to 11488 states and 38330 transitions. [2021-06-05 15:58:33,634 INFO L78 Accepts]: Start accepts. Automaton has 11488 states and 38330 transitions. Word has length 36 [2021-06-05 15:58:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:33,635 INFO L482 AbstractCegarLoop]: Abstraction has 11488 states and 38330 transitions. [2021-06-05 15:58:33,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 11488 states and 38330 transitions. [2021-06-05 15:58:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:33,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:33,648 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:33,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-06-05 15:58:33,849 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash -34052847, now seen corresponding path program 166 times [2021-06-05 15:58:33,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:33,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650019630] [2021-06-05 15:58:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:34,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:34,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650019630] [2021-06-05 15:58:34,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650019630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:34,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039674758] [2021-06-05 15:58:34,140 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 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 [2021-06-05 15:58:34,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:58:34,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:58:34,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:34,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039674758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:34,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:34,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:58:34,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249385426] [2021-06-05 15:58:34,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:58:34,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:34,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:58:34,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:58:34,716 INFO L87 Difference]: Start difference. First operand 11488 states and 38330 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:39,800 INFO L93 Difference]: Finished difference Result 22452 states and 70987 transitions. [2021-06-05 15:58:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 15:58:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:39,835 INFO L225 Difference]: With dead ends: 22452 [2021-06-05 15:58:39,835 INFO L226 Difference]: Without dead ends: 22279 [2021-06-05 15:58:39,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 4319.4ms TimeCoverageRelationStatistics Valid=1874, Invalid=10558, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 15:58:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22279 states. [2021-06-05 15:58:40,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22279 to 11506. [2021-06-05 15:58:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11506 states, 11505 states have (on average 3.3364624076488485) internal successors, (38386), 11505 states have internal predecessors, (38386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11506 states to 11506 states and 38386 transitions. [2021-06-05 15:58:40,098 INFO L78 Accepts]: Start accepts. Automaton has 11506 states and 38386 transitions. Word has length 36 [2021-06-05 15:58:40,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:40,098 INFO L482 AbstractCegarLoop]: Abstraction has 11506 states and 38386 transitions. [2021-06-05 15:58:40,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 11506 states and 38386 transitions. [2021-06-05 15:58:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:40,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:40,111 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:40,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:40,312 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:40,312 INFO L82 PathProgramCache]: Analyzing trace with hash 887649293, now seen corresponding path program 167 times [2021-06-05 15:58:40,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:40,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814642701] [2021-06-05 15:58:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:40,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:40,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814642701] [2021-06-05 15:58:40,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814642701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:40,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933795051] [2021-06-05 15:58:40,603 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 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 [2021-06-05 15:58:40,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:58:40,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:58:40,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:41,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933795051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:41,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:41,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:58:41,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987150829] [2021-06-05 15:58:41,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:58:41,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:41,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:58:41,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:58:41,189 INFO L87 Difference]: Start difference. First operand 11506 states and 38386 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:46,813 INFO L93 Difference]: Finished difference Result 23227 states and 73376 transitions. [2021-06-05 15:58:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 15:58:46,814 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:46,847 INFO L225 Difference]: With dead ends: 23227 [2021-06-05 15:58:46,847 INFO L226 Difference]: Without dead ends: 22979 [2021-06-05 15:58:46,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4641 ImplicationChecksByTransitivity, 4647.2ms TimeCoverageRelationStatistics Valid=2062, Invalid=11278, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 15:58:46,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22979 states. [2021-06-05 15:58:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22979 to 11503. [2021-06-05 15:58:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11503 states, 11502 states have (on average 3.3362893409841767) internal successors, (38374), 11502 states have internal predecessors, (38374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:47,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 38374 transitions. [2021-06-05 15:58:47,114 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 38374 transitions. Word has length 36 [2021-06-05 15:58:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:47,114 INFO L482 AbstractCegarLoop]: Abstraction has 11503 states and 38374 transitions. [2021-06-05 15:58:47,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 38374 transitions. [2021-06-05 15:58:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:47,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:47,128 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:47,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-05 15:58:47,328 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash -468537303, now seen corresponding path program 168 times [2021-06-05 15:58:47,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:47,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801251186] [2021-06-05 15:58:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:47,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:47,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801251186] [2021-06-05 15:58:47,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801251186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:47,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797357425] [2021-06-05 15:58:47,637 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 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 [2021-06-05 15:58:47,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:58:47,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:47,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:58:47,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:48,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797357425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:48,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:48,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:58:48,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115309089] [2021-06-05 15:58:48,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:58:48,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:48,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:58:48,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:58:48,221 INFO L87 Difference]: Start difference. First operand 11503 states and 38374 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:50,067 INFO L93 Difference]: Finished difference Result 13637 states and 44686 transitions. [2021-06-05 15:58:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:58:50,067 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:50,089 INFO L225 Difference]: With dead ends: 13637 [2021-06-05 15:58:50,089 INFO L226 Difference]: Without dead ends: 13523 [2021-06-05 15:58:50,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1554.2ms TimeCoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:58:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13523 states. [2021-06-05 15:58:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13523 to 11535. [2021-06-05 15:58:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11535 states, 11534 states have (on average 3.336916941217271) internal successors, (38488), 11534 states have internal predecessors, (38488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11535 states to 11535 states and 38488 transitions. [2021-06-05 15:58:50,302 INFO L78 Accepts]: Start accepts. Automaton has 11535 states and 38488 transitions. Word has length 36 [2021-06-05 15:58:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:50,302 INFO L482 AbstractCegarLoop]: Abstraction has 11535 states and 38488 transitions. [2021-06-05 15:58:50,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 11535 states and 38488 transitions. [2021-06-05 15:58:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:50,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:50,316 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:50,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1335,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:50,516 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:50,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:50,517 INFO L82 PathProgramCache]: Analyzing trace with hash 383054801, now seen corresponding path program 169 times [2021-06-05 15:58:50,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:50,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451376696] [2021-06-05 15:58:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:50,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:50,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451376696] [2021-06-05 15:58:50,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451376696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:50,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860075633] [2021-06-05 15:58:50,850 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 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 [2021-06-05 15:58:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:50,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:58:50,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:51,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860075633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:51,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:51,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:58:51,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673858778] [2021-06-05 15:58:51,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:58:51,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:51,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:58:51,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:58:51,474 INFO L87 Difference]: Start difference. First operand 11535 states and 38488 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:52,926 INFO L93 Difference]: Finished difference Result 16714 states and 54896 transitions. [2021-06-05 15:58:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:58:52,927 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:52,954 INFO L225 Difference]: With dead ends: 16714 [2021-06-05 15:58:52,955 INFO L226 Difference]: Without dead ends: 16594 [2021-06-05 15:58:52,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1491.9ms TimeCoverageRelationStatistics Valid=450, Invalid=2202, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:58:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16594 states. [2021-06-05 15:58:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16594 to 11539. [2021-06-05 15:58:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11539 states, 11538 states have (on average 3.3368001386722135) internal successors, (38500), 11538 states have internal predecessors, (38500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11539 states to 11539 states and 38500 transitions. [2021-06-05 15:58:53,158 INFO L78 Accepts]: Start accepts. Automaton has 11539 states and 38500 transitions. Word has length 36 [2021-06-05 15:58:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:53,158 INFO L482 AbstractCegarLoop]: Abstraction has 11539 states and 38500 transitions. [2021-06-05 15:58:53,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 11539 states and 38500 transitions. [2021-06-05 15:58:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:53,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:53,172 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:53,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1345 [2021-06-05 15:58:53,372 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:53,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:53,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1189866523, now seen corresponding path program 170 times [2021-06-05 15:58:53,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:53,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470767434] [2021-06-05 15:58:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:53,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:53,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470767434] [2021-06-05 15:58:53,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470767434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:53,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298375449] [2021-06-05 15:58:53,644 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 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 [2021-06-05 15:58:53,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:58:53,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:53,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:58:53,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:54,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298375449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:54,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:54,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:58:54,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647798318] [2021-06-05 15:58:54,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:58:54,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:54,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:58:54,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:58:54,233 INFO L87 Difference]: Start difference. First operand 11539 states and 38500 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:57,569 INFO L93 Difference]: Finished difference Result 13195 states and 43100 transitions. [2021-06-05 15:58:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:58:57,569 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:58:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:57,590 INFO L225 Difference]: With dead ends: 13195 [2021-06-05 15:58:57,590 INFO L226 Difference]: Without dead ends: 12999 [2021-06-05 15:58:57,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 2644.8ms TimeCoverageRelationStatistics Valid=746, Invalid=5574, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:58:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12999 states. [2021-06-05 15:58:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12999 to 11593. [2021-06-05 15:58:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11593 states, 11592 states have (on average 3.3358350586611456) internal successors, (38669), 11592 states have internal predecessors, (38669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11593 states to 11593 states and 38669 transitions. [2021-06-05 15:58:57,780 INFO L78 Accepts]: Start accepts. Automaton has 11593 states and 38669 transitions. Word has length 36 [2021-06-05 15:58:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:57,780 INFO L482 AbstractCegarLoop]: Abstraction has 11593 states and 38669 transitions. [2021-06-05 15:58:57,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 11593 states and 38669 transitions. [2021-06-05 15:58:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:58:57,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:57,847 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:58,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-06-05 15:58:58,047 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:58,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1146359181, now seen corresponding path program 171 times [2021-06-05 15:58:58,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:58,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555958590] [2021-06-05 15:58:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:58,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:58,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555958590] [2021-06-05 15:58:58,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555958590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:58,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161323994] [2021-06-05 15:58:58,317 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 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 [2021-06-05 15:58:58,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:58:58,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:58,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:58:58,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:58,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161323994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:58,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:58,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:58:58,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541267013] [2021-06-05 15:58:58,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:58:58,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:58,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:58:58,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:58:58,855 INFO L87 Difference]: Start difference. First operand 11593 states and 38669 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:01,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:01,658 INFO L93 Difference]: Finished difference Result 14199 states and 46179 transitions. [2021-06-05 15:59:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:59:01,658 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:01,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:01,680 INFO L225 Difference]: With dead ends: 14199 [2021-06-05 15:59:01,680 INFO L226 Difference]: Without dead ends: 14003 [2021-06-05 15:59:01,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 2236.7ms TimeCoverageRelationStatistics Valid=792, Invalid=5060, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:59:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14003 states. [2021-06-05 15:59:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14003 to 11627. [2021-06-05 15:59:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11627 states, 11626 states have (on average 3.33700326853604) internal successors, (38796), 11626 states have internal predecessors, (38796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11627 states to 11627 states and 38796 transitions. [2021-06-05 15:59:01,935 INFO L78 Accepts]: Start accepts. Automaton has 11627 states and 38796 transitions. Word has length 36 [2021-06-05 15:59:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:01,935 INFO L482 AbstractCegarLoop]: Abstraction has 11627 states and 38796 transitions. [2021-06-05 15:59:01,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 11627 states and 38796 transitions. [2021-06-05 15:59:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:01,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:01,949 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:02,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1359 [2021-06-05 15:59:02,149 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:02,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:02,150 INFO L82 PathProgramCache]: Analyzing trace with hash 114827301, now seen corresponding path program 172 times [2021-06-05 15:59:02,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:02,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584709594] [2021-06-05 15:59:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:02,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:02,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584709594] [2021-06-05 15:59:02,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584709594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:02,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166589391] [2021-06-05 15:59:02,503 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 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 [2021-06-05 15:59:02,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:59:02,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:02,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:59:02,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:03,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166589391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:03,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:03,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:59:03,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481071237] [2021-06-05 15:59:03,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:59:03,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:03,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:59:03,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:59:03,026 INFO L87 Difference]: Start difference. First operand 11627 states and 38796 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:04,911 INFO L93 Difference]: Finished difference Result 15890 states and 51993 transitions. [2021-06-05 15:59:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:59:04,917 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:04,943 INFO L225 Difference]: With dead ends: 15890 [2021-06-05 15:59:04,943 INFO L226 Difference]: Without dead ends: 15721 [2021-06-05 15:59:04,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1813.1ms TimeCoverageRelationStatistics Valid=504, Invalid=3036, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:59:04,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15721 states. [2021-06-05 15:59:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15721 to 11624. [2021-06-05 15:59:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11624 states, 11623 states have (on average 3.3365740342424504) internal successors, (38781), 11623 states have internal predecessors, (38781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11624 states to 11624 states and 38781 transitions. [2021-06-05 15:59:05,142 INFO L78 Accepts]: Start accepts. Automaton has 11624 states and 38781 transitions. Word has length 36 [2021-06-05 15:59:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:05,142 INFO L482 AbstractCegarLoop]: Abstraction has 11624 states and 38781 transitions. [2021-06-05 15:59:05,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 11624 states and 38781 transitions. [2021-06-05 15:59:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:05,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:05,155 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:05,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-06-05 15:59:05,356 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1397455009, now seen corresponding path program 173 times [2021-06-05 15:59:05,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:05,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984836062] [2021-06-05 15:59:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:05,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:05,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984836062] [2021-06-05 15:59:05,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984836062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:05,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883357619] [2021-06-05 15:59:05,644 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 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 [2021-06-05 15:59:05,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:59:05,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:05,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:59:05,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:06,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883357619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:06,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:06,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:59:06,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284437103] [2021-06-05 15:59:06,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:59:06,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:06,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:59:06,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:59:06,313 INFO L87 Difference]: Start difference. First operand 11624 states and 38781 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:10,105 INFO L93 Difference]: Finished difference Result 14094 states and 45590 transitions. [2021-06-05 15:59:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:59:10,105 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:10,129 INFO L225 Difference]: With dead ends: 14094 [2021-06-05 15:59:10,129 INFO L226 Difference]: Without dead ends: 13879 [2021-06-05 15:59:10,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 2975.7ms TimeCoverageRelationStatistics Valid=878, Invalid=6432, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:59:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13879 states. [2021-06-05 15:59:10,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13879 to 11726. [2021-06-05 15:59:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11726 states, 11725 states have (on average 3.3335607675906185) internal successors, (39086), 11725 states have internal predecessors, (39086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11726 states to 11726 states and 39086 transitions. [2021-06-05 15:59:10,347 INFO L78 Accepts]: Start accepts. Automaton has 11726 states and 39086 transitions. Word has length 36 [2021-06-05 15:59:10,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:10,347 INFO L482 AbstractCegarLoop]: Abstraction has 11726 states and 39086 transitions. [2021-06-05 15:59:10,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 11726 states and 39086 transitions. [2021-06-05 15:59:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:10,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:10,361 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:10,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1368 [2021-06-05 15:59:10,562 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:10,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1701030301, now seen corresponding path program 174 times [2021-06-05 15:59:10,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:10,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881815224] [2021-06-05 15:59:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:10,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:10,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881815224] [2021-06-05 15:59:10,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881815224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:10,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071582228] [2021-06-05 15:59:10,838 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 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 [2021-06-05 15:59:10,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:59:10,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:10,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:59:10,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:11,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071582228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:11,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:11,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:59:11,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990528390] [2021-06-05 15:59:11,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:59:11,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:11,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:59:11,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:59:11,423 INFO L87 Difference]: Start difference. First operand 11726 states and 39086 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:15,369 INFO L93 Difference]: Finished difference Result 15383 states and 49434 transitions. [2021-06-05 15:59:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:59:15,370 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:15,392 INFO L225 Difference]: With dead ends: 15383 [2021-06-05 15:59:15,392 INFO L226 Difference]: Without dead ends: 15107 [2021-06-05 15:59:15,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 2922.7ms TimeCoverageRelationStatistics Valid=963, Invalid=6869, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 15:59:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15107 states. [2021-06-05 15:59:15,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15107 to 11778. [2021-06-05 15:59:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11778 states, 11777 states have (on average 3.335399507514647) internal successors, (39281), 11777 states have internal predecessors, (39281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:15,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11778 states to 11778 states and 39281 transitions. [2021-06-05 15:59:15,596 INFO L78 Accepts]: Start accepts. Automaton has 11778 states and 39281 transitions. Word has length 36 [2021-06-05 15:59:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:15,596 INFO L482 AbstractCegarLoop]: Abstraction has 11778 states and 39281 transitions. [2021-06-05 15:59:15,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:15,597 INFO L276 IsEmpty]: Start isEmpty. Operand 11778 states and 39281 transitions. [2021-06-05 15:59:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:15,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:15,610 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:15,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:15,811 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:15,811 INFO L82 PathProgramCache]: Analyzing trace with hash 242460745, now seen corresponding path program 175 times [2021-06-05 15:59:15,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:15,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018529088] [2021-06-05 15:59:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:16,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:16,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018529088] [2021-06-05 15:59:16,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018529088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:16,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364236449] [2021-06-05 15:59:16,109 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 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 [2021-06-05 15:59:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:16,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:59:16,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:16,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364236449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:16,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:16,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:59:16,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770626680] [2021-06-05 15:59:16,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:59:16,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:16,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:59:16,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:59:16,713 INFO L87 Difference]: Start difference. First operand 11778 states and 39281 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:19,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:19,903 INFO L93 Difference]: Finished difference Result 13752 states and 44667 transitions. [2021-06-05 15:59:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:59:19,903 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:19,924 INFO L225 Difference]: With dead ends: 13752 [2021-06-05 15:59:19,924 INFO L226 Difference]: Without dead ends: 13537 [2021-06-05 15:59:19,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 2745.3ms TimeCoverageRelationStatistics Valid=963, Invalid=6009, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:59:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13537 states. [2021-06-05 15:59:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13537 to 11802. [2021-06-05 15:59:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11802 states, 11801 states have (on average 3.334717396830777) internal successors, (39353), 11801 states have internal predecessors, (39353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11802 states to 11802 states and 39353 transitions. [2021-06-05 15:59:20,119 INFO L78 Accepts]: Start accepts. Automaton has 11802 states and 39353 transitions. Word has length 36 [2021-06-05 15:59:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:20,119 INFO L482 AbstractCegarLoop]: Abstraction has 11802 states and 39353 transitions. [2021-06-05 15:59:20,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 11802 states and 39353 transitions. [2021-06-05 15:59:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:20,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:20,133 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:20,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-06-05 15:59:20,334 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:20,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1664425911, now seen corresponding path program 176 times [2021-06-05 15:59:20,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:20,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640069614] [2021-06-05 15:59:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:20,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:20,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640069614] [2021-06-05 15:59:20,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640069614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:20,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014751628] [2021-06-05 15:59:20,634 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 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 [2021-06-05 15:59:20,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:59:20,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:20,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:59:20,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:21,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014751628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:21,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:21,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 15:59:21,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039211922] [2021-06-05 15:59:21,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:59:21,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:21,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:59:21,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:59:21,187 INFO L87 Difference]: Start difference. First operand 11802 states and 39353 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:26,477 INFO L93 Difference]: Finished difference Result 18328 states and 58520 transitions. [2021-06-05 15:59:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 15:59:26,477 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:26,506 INFO L225 Difference]: With dead ends: 18328 [2021-06-05 15:59:26,506 INFO L226 Difference]: Without dead ends: 18047 [2021-06-05 15:59:26,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4376 ImplicationChecksByTransitivity, 4245.6ms TimeCoverageRelationStatistics Valid=1878, Invalid=11004, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 15:59:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18047 states. [2021-06-05 15:59:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18047 to 11858. [2021-06-05 15:59:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11858 states, 11857 states have (on average 3.3380281690140845) internal successors, (39579), 11857 states have internal predecessors, (39579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11858 states to 11858 states and 39579 transitions. [2021-06-05 15:59:26,786 INFO L78 Accepts]: Start accepts. Automaton has 11858 states and 39579 transitions. Word has length 36 [2021-06-05 15:59:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:26,786 INFO L482 AbstractCegarLoop]: Abstraction has 11858 states and 39579 transitions. [2021-06-05 15:59:26,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 11858 states and 39579 transitions. [2021-06-05 15:59:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:26,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:26,800 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:27,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1380 [2021-06-05 15:59:27,000 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:27,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1873465715, now seen corresponding path program 177 times [2021-06-05 15:59:27,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:27,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018684678] [2021-06-05 15:59:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:27,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:27,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018684678] [2021-06-05 15:59:27,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018684678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:27,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4859346] [2021-06-05 15:59:27,270 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 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 [2021-06-05 15:59:27,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:59:27,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:27,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:59:27,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:27,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4859346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:27,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:27,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:59:27,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299057087] [2021-06-05 15:59:27,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:59:27,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:27,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:59:27,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:59:27,861 INFO L87 Difference]: Start difference. First operand 11858 states and 39579 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:30,554 INFO L93 Difference]: Finished difference Result 14589 states and 47328 transitions. [2021-06-05 15:59:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:59:30,554 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:30,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:30,579 INFO L225 Difference]: With dead ends: 14589 [2021-06-05 15:59:30,579 INFO L226 Difference]: Without dead ends: 14393 [2021-06-05 15:59:30,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 2311.7ms TimeCoverageRelationStatistics Valid=778, Invalid=5228, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:59:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14393 states. [2021-06-05 15:59:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14393 to 11861. [2021-06-05 15:59:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11861 states, 11860 states have (on average 3.3387015177065766) internal successors, (39597), 11860 states have internal predecessors, (39597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 39597 transitions. [2021-06-05 15:59:30,834 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 39597 transitions. Word has length 36 [2021-06-05 15:59:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:30,834 INFO L482 AbstractCegarLoop]: Abstraction has 11861 states and 39597 transitions. [2021-06-05 15:59:30,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 39597 transitions. [2021-06-05 15:59:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:30,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:30,847 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:31,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:31,057 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:31,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1389969701, now seen corresponding path program 178 times [2021-06-05 15:59:31,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:31,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010840347] [2021-06-05 15:59:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:31,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:31,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010840347] [2021-06-05 15:59:31,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010840347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:31,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991552423] [2021-06-05 15:59:31,393 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 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 [2021-06-05 15:59:31,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:59:31,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:31,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:59:31,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:31,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991552423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:31,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:31,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:59:31,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904615756] [2021-06-05 15:59:31,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:59:31,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:59:31,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:59:31,928 INFO L87 Difference]: Start difference. First operand 11861 states and 39597 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:34,049 INFO L93 Difference]: Finished difference Result 15587 states and 51043 transitions. [2021-06-05 15:59:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:59:34,049 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:34,075 INFO L225 Difference]: With dead ends: 15587 [2021-06-05 15:59:34,075 INFO L226 Difference]: Without dead ends: 15418 [2021-06-05 15:59:34,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1829.3ms TimeCoverageRelationStatistics Valid=497, Invalid=3043, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:59:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15418 states. [2021-06-05 15:59:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15418 to 11844. [2021-06-05 15:59:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11844 states, 11843 states have (on average 3.3374989445241914) internal successors, (39526), 11843 states have internal predecessors, (39526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11844 states to 11844 states and 39526 transitions. [2021-06-05 15:59:34,284 INFO L78 Accepts]: Start accepts. Automaton has 11844 states and 39526 transitions. Word has length 36 [2021-06-05 15:59:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:34,284 INFO L482 AbstractCegarLoop]: Abstraction has 11844 states and 39526 transitions. [2021-06-05 15:59:34,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 11844 states and 39526 transitions. [2021-06-05 15:59:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:34,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:34,298 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:34,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1388 [2021-06-05 15:59:34,499 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1420539917, now seen corresponding path program 179 times [2021-06-05 15:59:34,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:34,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821905339] [2021-06-05 15:59:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:34,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:34,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821905339] [2021-06-05 15:59:34,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821905339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:34,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41617478] [2021-06-05 15:59:34,729 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 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 [2021-06-05 15:59:34,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:59:34,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:34,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:59:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:35,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41617478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:35,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:35,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:59:35,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207956274] [2021-06-05 15:59:35,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:59:35,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:59:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:59:35,323 INFO L87 Difference]: Start difference. First operand 11844 states and 39526 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:37,166 INFO L93 Difference]: Finished difference Result 21602 states and 70452 transitions. [2021-06-05 15:59:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:59:37,166 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:37,203 INFO L225 Difference]: With dead ends: 21602 [2021-06-05 15:59:37,203 INFO L226 Difference]: Without dead ends: 21522 [2021-06-05 15:59:37,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1565.8ms TimeCoverageRelationStatistics Valid=632, Invalid=2908, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:59:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21522 states. [2021-06-05 15:59:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21522 to 12142. [2021-06-05 15:59:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12142 states, 12141 states have (on average 3.341405156082695) internal successors, (40568), 12141 states have internal predecessors, (40568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12142 states to 12142 states and 40568 transitions. [2021-06-05 15:59:37,481 INFO L78 Accepts]: Start accepts. Automaton has 12142 states and 40568 transitions. Word has length 36 [2021-06-05 15:59:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:37,481 INFO L482 AbstractCegarLoop]: Abstraction has 12142 states and 40568 transitions. [2021-06-05 15:59:37,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 12142 states and 40568 transitions. [2021-06-05 15:59:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:37,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:37,497 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:37,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1393,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:37,698 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:37,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:37,698 INFO L82 PathProgramCache]: Analyzing trace with hash 467803489, now seen corresponding path program 180 times [2021-06-05 15:59:37,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:37,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613399636] [2021-06-05 15:59:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:38,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:38,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613399636] [2021-06-05 15:59:38,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613399636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:38,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70658142] [2021-06-05 15:59:38,076 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 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 [2021-06-05 15:59:38,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:59:38,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:38,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:59:38,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:38,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70658142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:38,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:38,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 15:59:38,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463424269] [2021-06-05 15:59:38,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:59:38,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:38,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:59:38,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:59:38,731 INFO L87 Difference]: Start difference. First operand 12142 states and 40568 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:41,982 INFO L93 Difference]: Finished difference Result 25038 states and 81053 transitions. [2021-06-05 15:59:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 15:59:41,982 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:42,024 INFO L225 Difference]: With dead ends: 25038 [2021-06-05 15:59:42,025 INFO L226 Difference]: Without dead ends: 24894 [2021-06-05 15:59:42,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2181 ImplicationChecksByTransitivity, 3033.5ms TimeCoverageRelationStatistics Valid=1203, Invalid=5603, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 15:59:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24894 states. [2021-06-05 15:59:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24894 to 12144. [2021-06-05 15:59:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12144 states, 12143 states have (on average 3.3383842543028908) internal successors, (40538), 12143 states have internal predecessors, (40538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12144 states to 12144 states and 40538 transitions. [2021-06-05 15:59:42,294 INFO L78 Accepts]: Start accepts. Automaton has 12144 states and 40538 transitions. Word has length 36 [2021-06-05 15:59:42,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:42,294 INFO L482 AbstractCegarLoop]: Abstraction has 12144 states and 40538 transitions. [2021-06-05 15:59:42,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:42,294 INFO L276 IsEmpty]: Start isEmpty. Operand 12144 states and 40538 transitions. [2021-06-05 15:59:42,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:42,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:42,308 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:42,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1402,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:42,509 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:42,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1192840929, now seen corresponding path program 181 times [2021-06-05 15:59:42,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:42,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797596698] [2021-06-05 15:59:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:42,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:42,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797596698] [2021-06-05 15:59:42,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797596698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:42,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582972829] [2021-06-05 15:59:42,889 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 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 [2021-06-05 15:59:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:42,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:59:42,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:43,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582972829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:43,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:43,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:59:43,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374451786] [2021-06-05 15:59:43,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:59:43,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:43,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:59:43,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:59:43,512 INFO L87 Difference]: Start difference. First operand 12144 states and 40538 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:45,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:45,536 INFO L93 Difference]: Finished difference Result 20977 states and 68569 transitions. [2021-06-05 15:59:45,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:59:45,536 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:45,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:45,570 INFO L225 Difference]: With dead ends: 20977 [2021-06-05 15:59:45,570 INFO L226 Difference]: Without dead ends: 20857 [2021-06-05 15:59:45,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1947.3ms TimeCoverageRelationStatistics Valid=606, Invalid=3054, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:59:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20857 states. [2021-06-05 15:59:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20857 to 12189. [2021-06-05 15:59:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12189 states, 12188 states have (on average 3.338037413849688) internal successors, (40684), 12188 states have internal predecessors, (40684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12189 states to 12189 states and 40684 transitions. [2021-06-05 15:59:45,807 INFO L78 Accepts]: Start accepts. Automaton has 12189 states and 40684 transitions. Word has length 36 [2021-06-05 15:59:45,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:45,807 INFO L482 AbstractCegarLoop]: Abstraction has 12189 states and 40684 transitions. [2021-06-05 15:59:45,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:45,807 INFO L276 IsEmpty]: Start isEmpty. Operand 12189 states and 40684 transitions. [2021-06-05 15:59:45,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:45,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:45,822 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:46,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1412 [2021-06-05 15:59:46,022 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:46,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1184665001, now seen corresponding path program 182 times [2021-06-05 15:59:46,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:46,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816718666] [2021-06-05 15:59:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:46,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:46,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816718666] [2021-06-05 15:59:46,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816718666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:46,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992938856] [2021-06-05 15:59:46,298 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 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 [2021-06-05 15:59:46,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:59:46,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:46,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:59:46,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:46,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992938856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:46,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:46,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:59:46,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280061435] [2021-06-05 15:59:46,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:59:46,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:46,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:59:46,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:59:46,862 INFO L87 Difference]: Start difference. First operand 12189 states and 40684 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:50,323 INFO L93 Difference]: Finished difference Result 19086 states and 61174 transitions. [2021-06-05 15:59:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 15:59:50,323 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:50,355 INFO L225 Difference]: With dead ends: 19086 [2021-06-05 15:59:50,355 INFO L226 Difference]: Without dead ends: 18870 [2021-06-05 15:59:50,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 2925.1ms TimeCoverageRelationStatistics Valid=1293, Invalid=6897, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 15:59:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18870 states. [2021-06-05 15:59:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18870 to 12229. [2021-06-05 15:59:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12229 states, 12228 states have (on average 3.3382401046777885) internal successors, (40820), 12228 states have internal predecessors, (40820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12229 states to 12229 states and 40820 transitions. [2021-06-05 15:59:50,638 INFO L78 Accepts]: Start accepts. Automaton has 12229 states and 40820 transitions. Word has length 36 [2021-06-05 15:59:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:50,638 INFO L482 AbstractCegarLoop]: Abstraction has 12229 states and 40820 transitions. [2021-06-05 15:59:50,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 12229 states and 40820 transitions. [2021-06-05 15:59:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:50,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:50,653 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:50,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:50,853 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:50,854 INFO L82 PathProgramCache]: Analyzing trace with hash -380080395, now seen corresponding path program 183 times [2021-06-05 15:59:50,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:50,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955158608] [2021-06-05 15:59:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:51,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:51,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955158608] [2021-06-05 15:59:51,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955158608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:51,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217070057] [2021-06-05 15:59:51,122 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 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 [2021-06-05 15:59:51,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:59:51,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:51,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:59:51,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:51,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217070057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:51,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:51,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 15:59:51,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425815315] [2021-06-05 15:59:51,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:59:51,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:51,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:59:51,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:59:51,667 INFO L87 Difference]: Start difference. First operand 12229 states and 40820 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:56,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:56,108 INFO L93 Difference]: Finished difference Result 16407 states and 52859 transitions. [2021-06-05 15:59:56,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 15:59:56,108 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 15:59:56,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:56,134 INFO L225 Difference]: With dead ends: 16407 [2021-06-05 15:59:56,134 INFO L226 Difference]: Without dead ends: 16211 [2021-06-05 15:59:56,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3092 ImplicationChecksByTransitivity, 3567.4ms TimeCoverageRelationStatistics Valid=1118, Invalid=8584, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 15:59:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16211 states. [2021-06-05 15:59:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16211 to 12269. [2021-06-05 15:59:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12269 states, 12268 states have (on average 3.3387675252689926) internal successors, (40960), 12268 states have internal predecessors, (40960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12269 states to 12269 states and 40960 transitions. [2021-06-05 15:59:56,356 INFO L78 Accepts]: Start accepts. Automaton has 12269 states and 40960 transitions. Word has length 36 [2021-06-05 15:59:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:56,356 INFO L482 AbstractCegarLoop]: Abstraction has 12269 states and 40960 transitions. [2021-06-05 15:59:56,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 12269 states and 40960 transitions. [2021-06-05 15:59:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:59:56,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:56,371 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:56,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-06-05 15:59:56,585 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:56,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1956145309, now seen corresponding path program 184 times [2021-06-05 15:59:56,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:56,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327805289] [2021-06-05 15:59:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:56,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327805289] [2021-06-05 15:59:56,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327805289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786572028] [2021-06-05 15:59:56,855 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 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 [2021-06-05 15:59:56,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:59:56,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:56,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:59:56,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:57,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786572028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:57,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:57,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:59:57,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671386115] [2021-06-05 15:59:57,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:59:57,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:57,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:59:57,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:59:57,420 INFO L87 Difference]: Start difference. First operand 12269 states and 40960 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:00,364 INFO L93 Difference]: Finished difference Result 15302 states and 49660 transitions. [2021-06-05 16:00:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 16:00:00,364 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:00,389 INFO L225 Difference]: With dead ends: 15302 [2021-06-05 16:00:00,389 INFO L226 Difference]: Without dead ends: 15141 [2021-06-05 16:00:00,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 2603.4ms TimeCoverageRelationStatistics Valid=983, Invalid=6327, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 16:00:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15141 states. [2021-06-05 16:00:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15141 to 12290. [2021-06-05 16:00:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12290 states, 12289 states have (on average 3.3385141183171942) internal successors, (41027), 12289 states have internal predecessors, (41027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12290 states to 12290 states and 41027 transitions. [2021-06-05 16:00:00,615 INFO L78 Accepts]: Start accepts. Automaton has 12290 states and 41027 transitions. Word has length 36 [2021-06-05 16:00:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:00,615 INFO L482 AbstractCegarLoop]: Abstraction has 12290 states and 41027 transitions. [2021-06-05 16:00:00,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 12290 states and 41027 transitions. [2021-06-05 16:00:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:00,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:00,629 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:00,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1427,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:00,830 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1621253987, now seen corresponding path program 185 times [2021-06-05 16:00:00,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:00,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919782105] [2021-06-05 16:00:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:01,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:01,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919782105] [2021-06-05 16:00:01,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919782105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:01,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579984457] [2021-06-05 16:00:01,131 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 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 [2021-06-05 16:00:01,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:00:01,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:01,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:00:01,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:01,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579984457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:01,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:01,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 16:00:01,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744058877] [2021-06-05 16:00:01,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 16:00:01,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:01,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 16:00:01,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:00:01,711 INFO L87 Difference]: Start difference. First operand 12290 states and 41027 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:05,891 INFO L93 Difference]: Finished difference Result 19633 states and 62945 transitions. [2021-06-05 16:00:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 16:00:05,891 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:05,927 INFO L225 Difference]: With dead ends: 19633 [2021-06-05 16:00:05,927 INFO L226 Difference]: Without dead ends: 19422 [2021-06-05 16:00:05,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 3577.2ms TimeCoverageRelationStatistics Valid=1359, Invalid=7761, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 16:00:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19422 states. [2021-06-05 16:00:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19422 to 12293. [2021-06-05 16:00:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12293 states, 12292 states have (on average 3.338512853888708) internal successors, (41037), 12292 states have internal predecessors, (41037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12293 states to 12293 states and 41037 transitions. [2021-06-05 16:00:06,228 INFO L78 Accepts]: Start accepts. Automaton has 12293 states and 41037 transitions. Word has length 36 [2021-06-05 16:00:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:06,228 INFO L482 AbstractCegarLoop]: Abstraction has 12293 states and 41037 transitions. [2021-06-05 16:00:06,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 12293 states and 41037 transitions. [2021-06-05 16:00:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:06,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:06,244 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:06,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 16:00:06,456 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:06,456 INFO L82 PathProgramCache]: Analyzing trace with hash 854503393, now seen corresponding path program 186 times [2021-06-05 16:00:06,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:06,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170190970] [2021-06-05 16:00:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:06,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:06,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170190970] [2021-06-05 16:00:06,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170190970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:06,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542354824] [2021-06-05 16:00:06,849 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 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 [2021-06-05 16:00:06,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:00:06,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:06,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:00:06,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:07,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542354824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:07,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:07,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 16:00:07,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460027328] [2021-06-05 16:00:07,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 16:00:07,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:07,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 16:00:07,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:00:07,414 INFO L87 Difference]: Start difference. First operand 12293 states and 41037 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:09,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:09,959 INFO L93 Difference]: Finished difference Result 17914 states and 58827 transitions. [2021-06-05 16:00:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:00:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:10,008 INFO L225 Difference]: With dead ends: 17914 [2021-06-05 16:00:10,008 INFO L226 Difference]: Without dead ends: 17785 [2021-06-05 16:00:10,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 2255.6ms TimeCoverageRelationStatistics Valid=535, Invalid=3125, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:00:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17785 states. [2021-06-05 16:00:10,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17785 to 12293. [2021-06-05 16:00:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12293 states, 12292 states have (on average 3.338106085258705) internal successors, (41032), 12292 states have internal predecessors, (41032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12293 states to 12293 states and 41032 transitions. [2021-06-05 16:00:10,269 INFO L78 Accepts]: Start accepts. Automaton has 12293 states and 41032 transitions. Word has length 36 [2021-06-05 16:00:10,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:10,269 INFO L482 AbstractCegarLoop]: Abstraction has 12293 states and 41032 transitions. [2021-06-05 16:00:10,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 12293 states and 41032 transitions. [2021-06-05 16:00:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:10,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:10,291 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:10,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:10,491 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:10,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1323374493, now seen corresponding path program 187 times [2021-06-05 16:00:10,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:10,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813539846] [2021-06-05 16:00:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:10,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:10,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813539846] [2021-06-05 16:00:10,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813539846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:10,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404371013] [2021-06-05 16:00:10,791 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 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 [2021-06-05 16:00:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:00:10,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:11,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404371013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:11,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:11,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 16:00:11,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451026847] [2021-06-05 16:00:11,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:00:11,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:00:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:00:11,398 INFO L87 Difference]: Start difference. First operand 12293 states and 41032 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:13,760 INFO L93 Difference]: Finished difference Result 23068 states and 75736 transitions. [2021-06-05 16:00:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:00:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:13,798 INFO L225 Difference]: With dead ends: 23068 [2021-06-05 16:00:13,798 INFO L226 Difference]: Without dead ends: 22988 [2021-06-05 16:00:13,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1857.6ms TimeCoverageRelationStatistics Valid=751, Invalid=3281, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:00:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22988 states. [2021-06-05 16:00:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22988 to 12968. [2021-06-05 16:00:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12968 states, 12967 states have (on average 3.352818693606848) internal successors, (43476), 12967 states have internal predecessors, (43476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12968 states to 12968 states and 43476 transitions. [2021-06-05 16:00:14,099 INFO L78 Accepts]: Start accepts. Automaton has 12968 states and 43476 transitions. Word has length 36 [2021-06-05 16:00:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:14,099 INFO L482 AbstractCegarLoop]: Abstraction has 12968 states and 43476 transitions. [2021-06-05 16:00:14,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 12968 states and 43476 transitions. [2021-06-05 16:00:14,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:14,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:14,115 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:14,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1440 [2021-06-05 16:00:14,315 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:14,316 INFO L82 PathProgramCache]: Analyzing trace with hash -692650399, now seen corresponding path program 188 times [2021-06-05 16:00:14,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:14,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939318563] [2021-06-05 16:00:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:14,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:14,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939318563] [2021-06-05 16:00:14,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939318563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:14,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127543731] [2021-06-05 16:00:14,572 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 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 [2021-06-05 16:00:14,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:14,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:14,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:00:14,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:15,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127543731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:15,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:15,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 16:00:15,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419315159] [2021-06-05 16:00:15,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:00:15,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:00:15,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:00:15,118 INFO L87 Difference]: Start difference. First operand 12968 states and 43476 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:18,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:18,834 INFO L93 Difference]: Finished difference Result 22786 states and 72843 transitions. [2021-06-05 16:00:18,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 16:00:18,835 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:18,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:18,873 INFO L225 Difference]: With dead ends: 22786 [2021-06-05 16:00:18,873 INFO L226 Difference]: Without dead ends: 22614 [2021-06-05 16:00:18,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 2828.4ms TimeCoverageRelationStatistics Valid=1189, Invalid=5783, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 16:00:18,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22614 states. [2021-06-05 16:00:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22614 to 12990. [2021-06-05 16:00:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12990 states, 12989 states have (on average 3.3539148510277927) internal successors, (43564), 12989 states have internal predecessors, (43564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12990 states to 12990 states and 43564 transitions. [2021-06-05 16:00:19,181 INFO L78 Accepts]: Start accepts. Automaton has 12990 states and 43564 transitions. Word has length 36 [2021-06-05 16:00:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:19,181 INFO L482 AbstractCegarLoop]: Abstraction has 12990 states and 43564 transitions. [2021-06-05 16:00:19,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 12990 states and 43564 transitions. [2021-06-05 16:00:19,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:19,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:19,196 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:19,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1454 [2021-06-05 16:00:19,398 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1695532813, now seen corresponding path program 189 times [2021-06-05 16:00:19,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:19,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750956533] [2021-06-05 16:00:19,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:19,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:19,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750956533] [2021-06-05 16:00:19,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750956533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:19,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944798106] [2021-06-05 16:00:19,660 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 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 [2021-06-05 16:00:19,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:00:19,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:19,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:00:19,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:20,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944798106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:20,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:20,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 16:00:20,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634748364] [2021-06-05 16:00:20,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 16:00:20,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:20,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 16:00:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:00:20,210 INFO L87 Difference]: Start difference. First operand 12990 states and 43564 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:24,056 INFO L93 Difference]: Finished difference Result 23278 states and 74375 transitions. [2021-06-05 16:00:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:00:24,057 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:24,099 INFO L225 Difference]: With dead ends: 23278 [2021-06-05 16:00:24,099 INFO L226 Difference]: Without dead ends: 23106 [2021-06-05 16:00:24,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 2959.8ms TimeCoverageRelationStatistics Valid=1432, Invalid=6940, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 16:00:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23106 states. [2021-06-05 16:00:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23106 to 12962. [2021-06-05 16:00:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12962 states, 12961 states have (on average 3.352519095748785) internal successors, (43452), 12961 states have internal predecessors, (43452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12962 states to 12962 states and 43452 transitions. [2021-06-05 16:00:24,416 INFO L78 Accepts]: Start accepts. Automaton has 12962 states and 43452 transitions. Word has length 36 [2021-06-05 16:00:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:24,416 INFO L482 AbstractCegarLoop]: Abstraction has 12962 states and 43452 transitions. [2021-06-05 16:00:24,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 12962 states and 43452 transitions. [2021-06-05 16:00:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:24,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:24,432 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:24,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1458,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:24,637 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:24,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:24,637 INFO L82 PathProgramCache]: Analyzing trace with hash -763276463, now seen corresponding path program 190 times [2021-06-05 16:00:24,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:24,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379049570] [2021-06-05 16:00:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:24,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:24,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379049570] [2021-06-05 16:00:24,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379049570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:24,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521345233] [2021-06-05 16:00:24,913 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 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 [2021-06-05 16:00:24,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:24,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:24,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:00:24,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:25,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521345233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:25,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:25,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 16:00:25,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085332350] [2021-06-05 16:00:25,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 16:00:25,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:25,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 16:00:25,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:00:25,583 INFO L87 Difference]: Start difference. First operand 12962 states and 43452 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:29,560 INFO L93 Difference]: Finished difference Result 23019 states and 73482 transitions. [2021-06-05 16:00:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 16:00:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:29,600 INFO L225 Difference]: With dead ends: 23019 [2021-06-05 16:00:29,600 INFO L226 Difference]: Without dead ends: 22847 [2021-06-05 16:00:29,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2960 ImplicationChecksByTransitivity, 3439.0ms TimeCoverageRelationStatistics Valid=1505, Invalid=7807, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 16:00:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22847 states. [2021-06-05 16:00:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22847 to 12913. [2021-06-05 16:00:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12913 states, 12912 states have (on average 3.349907063197026) internal successors, (43254), 12912 states have internal predecessors, (43254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12913 states to 12913 states and 43254 transitions. [2021-06-05 16:00:29,954 INFO L78 Accepts]: Start accepts. Automaton has 12913 states and 43254 transitions. Word has length 36 [2021-06-05 16:00:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:29,954 INFO L482 AbstractCegarLoop]: Abstraction has 12913 states and 43254 transitions. [2021-06-05 16:00:29,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 12913 states and 43254 transitions. [2021-06-05 16:00:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:29,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:29,972 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:30,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-06-05 16:00:30,180 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:30,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2119463059, now seen corresponding path program 191 times [2021-06-05 16:00:30,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:30,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729990422] [2021-06-05 16:00:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:30,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:30,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729990422] [2021-06-05 16:00:30,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729990422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:30,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369527260] [2021-06-05 16:00:30,494 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:30,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:00:30,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:30,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:00:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:31,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369527260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:31,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:31,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 16:00:31,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858306845] [2021-06-05 16:00:31,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:00:31,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:31,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:00:31,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:00:31,107 INFO L87 Difference]: Start difference. First operand 12913 states and 43254 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:32,543 INFO L93 Difference]: Finished difference Result 15149 states and 49953 transitions. [2021-06-05 16:00:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:00:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:32,570 INFO L225 Difference]: With dead ends: 15149 [2021-06-05 16:00:32,570 INFO L226 Difference]: Without dead ends: 15081 [2021-06-05 16:00:32,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1424.4ms TimeCoverageRelationStatistics Valid=462, Invalid=2400, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:00:32,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15081 states. [2021-06-05 16:00:32,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15081 to 13005. [2021-06-05 16:00:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13005 states, 13004 states have (on average 3.3488157490003077) internal successors, (43548), 13004 states have internal predecessors, (43548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13005 states to 13005 states and 43548 transitions. [2021-06-05 16:00:32,803 INFO L78 Accepts]: Start accepts. Automaton has 13005 states and 43548 transitions. Word has length 36 [2021-06-05 16:00:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:32,803 INFO L482 AbstractCegarLoop]: Abstraction has 13005 states and 43548 transitions. [2021-06-05 16:00:32,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 13005 states and 43548 transitions. [2021-06-05 16:00:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:32,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:32,819 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:33,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1466 [2021-06-05 16:00:33,019 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:33,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1197760919, now seen corresponding path program 192 times [2021-06-05 16:00:33,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:33,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848259980] [2021-06-05 16:00:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:33,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:33,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848259980] [2021-06-05 16:00:33,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848259980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:33,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371697334] [2021-06-05 16:00:33,343 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:33,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:00:33,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:33,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:00:33,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:34,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371697334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:34,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:34,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 16:00:34,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729581486] [2021-06-05 16:00:34,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 16:00:34,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:34,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 16:00:34,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:00:34,018 INFO L87 Difference]: Start difference. First operand 13005 states and 43548 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:35,711 INFO L93 Difference]: Finished difference Result 16075 states and 53117 transitions. [2021-06-05 16:00:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:00:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:35,741 INFO L225 Difference]: With dead ends: 16075 [2021-06-05 16:00:35,741 INFO L226 Difference]: Without dead ends: 15955 [2021-06-05 16:00:35,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1557.6ms TimeCoverageRelationStatistics Valid=513, Invalid=2457, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:00:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15955 states. [2021-06-05 16:00:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15955 to 13001. [2021-06-05 16:00:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13001 states, 13000 states have (on average 3.3484615384615384) internal successors, (43530), 13000 states have internal predecessors, (43530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13001 states to 13001 states and 43530 transitions. [2021-06-05 16:00:35,986 INFO L78 Accepts]: Start accepts. Automaton has 13001 states and 43530 transitions. Word has length 36 [2021-06-05 16:00:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:35,986 INFO L482 AbstractCegarLoop]: Abstraction has 13001 states and 43530 transitions. [2021-06-05 16:00:35,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 13001 states and 43530 transitions. [2021-06-05 16:00:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:36,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:36,002 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:36,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:36,203 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:36,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1267870955, now seen corresponding path program 193 times [2021-06-05 16:00:36,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:36,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624088640] [2021-06-05 16:00:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:36,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:36,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624088640] [2021-06-05 16:00:36,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624088640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:36,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351306411] [2021-06-05 16:00:36,494 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:36,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:00:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:37,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351306411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:37,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:37,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 16:00:37,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677369432] [2021-06-05 16:00:37,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:00:37,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:37,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:00:37,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:00:37,172 INFO L87 Difference]: Start difference. First operand 13001 states and 43530 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:38,849 INFO L93 Difference]: Finished difference Result 15975 states and 53082 transitions. [2021-06-05 16:00:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:00:38,849 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:38,878 INFO L225 Difference]: With dead ends: 15975 [2021-06-05 16:00:38,879 INFO L226 Difference]: Without dead ends: 15855 [2021-06-05 16:00:38,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1509.4ms TimeCoverageRelationStatistics Valid=515, Invalid=2455, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:00:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15855 states. [2021-06-05 16:00:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15855 to 12997. [2021-06-05 16:00:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12997 states, 12996 states have (on average 3.3485687903970454) internal successors, (43518), 12996 states have internal predecessors, (43518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12997 states to 12997 states and 43518 transitions. [2021-06-05 16:00:39,127 INFO L78 Accepts]: Start accepts. Automaton has 12997 states and 43518 transitions. Word has length 36 [2021-06-05 16:00:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:39,127 INFO L482 AbstractCegarLoop]: Abstraction has 12997 states and 43518 transitions. [2021-06-05 16:00:39,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 12997 states and 43518 transitions. [2021-06-05 16:00:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:39,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:39,144 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:39,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1480,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:39,344 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:39,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1454175017, now seen corresponding path program 194 times [2021-06-05 16:00:39,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:39,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859376763] [2021-06-05 16:00:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:39,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859376763] [2021-06-05 16:00:39,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859376763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204192449] [2021-06-05 16:00:39,594 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:39,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:39,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:39,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:00:39,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:40,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204192449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:40,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:40,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 16:00:40,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462675431] [2021-06-05 16:00:40,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:00:40,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:40,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:00:40,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:00:40,169 INFO L87 Difference]: Start difference. First operand 12997 states and 43518 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:42,872 INFO L93 Difference]: Finished difference Result 14950 states and 48998 transitions. [2021-06-05 16:00:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:00:42,873 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:42,897 INFO L225 Difference]: With dead ends: 14950 [2021-06-05 16:00:42,897 INFO L226 Difference]: Without dead ends: 14660 [2021-06-05 16:00:42,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 2128.1ms TimeCoverageRelationStatistics Valid=731, Invalid=4525, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:00:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14660 states. [2021-06-05 16:00:43,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14660 to 13079. [2021-06-05 16:00:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13079 states, 13078 states have (on average 3.3476066676861906) internal successors, (43780), 13078 states have internal predecessors, (43780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13079 states to 13079 states and 43780 transitions. [2021-06-05 16:00:43,121 INFO L78 Accepts]: Start accepts. Automaton has 13079 states and 43780 transitions. Word has length 36 [2021-06-05 16:00:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:43,121 INFO L482 AbstractCegarLoop]: Abstraction has 13079 states and 43780 transitions. [2021-06-05 16:00:43,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 13079 states and 43780 transitions. [2021-06-05 16:00:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:43,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:43,139 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:43,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:43,340 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:43,340 INFO L82 PathProgramCache]: Analyzing trace with hash -504566575, now seen corresponding path program 195 times [2021-06-05 16:00:43,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:43,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932934747] [2021-06-05 16:00:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:43,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:43,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932934747] [2021-06-05 16:00:43,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932934747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:43,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600085352] [2021-06-05 16:00:43,602 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:43,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:00:43,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:43,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:00:43,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:44,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600085352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:44,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:44,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 16:00:44,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684595969] [2021-06-05 16:00:44,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:00:44,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:44,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:00:44,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:00:44,204 INFO L87 Difference]: Start difference. First operand 13079 states and 43780 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:46,904 INFO L93 Difference]: Finished difference Result 15902 states and 51920 transitions. [2021-06-05 16:00:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:00:46,904 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:46,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:46,929 INFO L225 Difference]: With dead ends: 15902 [2021-06-05 16:00:46,929 INFO L226 Difference]: Without dead ends: 15644 [2021-06-05 16:00:46,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 2037.2ms TimeCoverageRelationStatistics Valid=799, Invalid=4313, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 16:00:46,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15644 states. [2021-06-05 16:00:47,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15644 to 13110. [2021-06-05 16:00:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13110 states, 13109 states have (on average 3.3476237699290565) internal successors, (43884), 13109 states have internal predecessors, (43884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13110 states to 13110 states and 43884 transitions. [2021-06-05 16:00:47,171 INFO L78 Accepts]: Start accepts. Automaton has 13110 states and 43884 transitions. Word has length 36 [2021-06-05 16:00:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:47,171 INFO L482 AbstractCegarLoop]: Abstraction has 13110 states and 43884 transitions. [2021-06-05 16:00:47,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand 13110 states and 43884 transitions. [2021-06-05 16:00:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:47,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:47,190 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:47,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1494,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:47,390 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1536098455, now seen corresponding path program 196 times [2021-06-05 16:00:47,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:47,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429846733] [2021-06-05 16:00:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:47,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:47,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429846733] [2021-06-05 16:00:47,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429846733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:47,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601069901] [2021-06-05 16:00:47,647 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:47,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:47,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:47,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:00:47,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:48,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601069901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:48,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:48,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 16:00:48,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750925789] [2021-06-05 16:00:48,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:00:48,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:48,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:00:48,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:00:48,180 INFO L87 Difference]: Start difference. First operand 13110 states and 43884 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:50,062 INFO L93 Difference]: Finished difference Result 17253 states and 56818 transitions. [2021-06-05 16:00:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 16:00:50,062 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:50,147 INFO L225 Difference]: With dead ends: 17253 [2021-06-05 16:00:50,147 INFO L226 Difference]: Without dead ends: 17060 [2021-06-05 16:00:50,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1616.2ms TimeCoverageRelationStatistics Valid=640, Invalid=3266, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:00:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17060 states. [2021-06-05 16:00:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17060 to 13073. [2021-06-05 16:00:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13073 states, 13072 states have (on average 3.3471542227662177) internal successors, (43754), 13072 states have internal predecessors, (43754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13073 states to 13073 states and 43754 transitions. [2021-06-05 16:00:50,381 INFO L78 Accepts]: Start accepts. Automaton has 13073 states and 43754 transitions. Word has length 36 [2021-06-05 16:00:50,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:50,381 INFO L482 AbstractCegarLoop]: Abstraction has 13073 states and 43754 transitions. [2021-06-05 16:00:50,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:50,381 INFO L276 IsEmpty]: Start isEmpty. Operand 13073 states and 43754 transitions. [2021-06-05 16:00:50,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:50,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:50,399 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:50,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1498 [2021-06-05 16:00:50,600 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:50,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1304074627, now seen corresponding path program 197 times [2021-06-05 16:00:50,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:50,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519850188] [2021-06-05 16:00:50,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:50,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:50,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519850188] [2021-06-05 16:00:50,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519850188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:50,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675628453] [2021-06-05 16:00:50,858 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:50,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:00:50,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:50,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:00:50,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:51,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675628453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:51,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:51,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 16:00:51,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590925452] [2021-06-05 16:00:51,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:00:51,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:51,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:00:51,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:00:51,459 INFO L87 Difference]: Start difference. First operand 13073 states and 43754 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:53,071 INFO L93 Difference]: Finished difference Result 16691 states and 54940 transitions. [2021-06-05 16:00:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:00:53,072 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:53,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:53,103 INFO L225 Difference]: With dead ends: 16691 [2021-06-05 16:00:53,103 INFO L226 Difference]: Without dead ends: 16623 [2021-06-05 16:00:53,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1528.4ms TimeCoverageRelationStatistics Valid=554, Invalid=2526, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:00:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16623 states. [2021-06-05 16:00:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16623 to 13129. [2021-06-05 16:00:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13129 states, 13128 states have (on average 3.347044485070079) internal successors, (43940), 13128 states have internal predecessors, (43940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13129 states to 13129 states and 43940 transitions. [2021-06-05 16:00:53,346 INFO L78 Accepts]: Start accepts. Automaton has 13129 states and 43940 transitions. Word has length 36 [2021-06-05 16:00:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:53,346 INFO L482 AbstractCegarLoop]: Abstraction has 13129 states and 43940 transitions. [2021-06-05 16:00:53,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 13129 states and 43940 transitions. [2021-06-05 16:00:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:53,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:53,366 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:53,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1503 [2021-06-05 16:00:53,581 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:53,581 INFO L82 PathProgramCache]: Analyzing trace with hash -382372487, now seen corresponding path program 198 times [2021-06-05 16:00:53,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:53,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223057260] [2021-06-05 16:00:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:53,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:53,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223057260] [2021-06-05 16:00:53,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223057260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:53,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43345195] [2021-06-05 16:00:53,917 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:53,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:00:53,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:53,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:00:53,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:54,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43345195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:54,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:54,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 16:00:54,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092417276] [2021-06-05 16:00:54,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 16:00:54,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:54,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 16:00:54,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:00:54,489 INFO L87 Difference]: Start difference. First operand 13129 states and 43940 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:55,846 INFO L93 Difference]: Finished difference Result 17470 states and 57221 transitions. [2021-06-05 16:00:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:00:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:55,875 INFO L225 Difference]: With dead ends: 17470 [2021-06-05 16:00:55,875 INFO L226 Difference]: Without dead ends: 17350 [2021-06-05 16:00:55,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1395.3ms TimeCoverageRelationStatistics Valid=545, Invalid=2107, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:00:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17350 states. [2021-06-05 16:00:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17350 to 13125. [2021-06-05 16:00:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13125 states, 13124 states have (on average 3.3466930813776288) internal successors, (43922), 13124 states have internal predecessors, (43922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13125 states to 13125 states and 43922 transitions. [2021-06-05 16:00:56,125 INFO L78 Accepts]: Start accepts. Automaton has 13125 states and 43922 transitions. Word has length 36 [2021-06-05 16:00:56,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:56,125 INFO L482 AbstractCegarLoop]: Abstraction has 13125 states and 43922 transitions. [2021-06-05 16:00:56,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand 13125 states and 43922 transitions. [2021-06-05 16:00:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:56,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:56,143 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:56,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1507,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:56,343 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:56,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:56,343 INFO L82 PathProgramCache]: Analyzing trace with hash -452482523, now seen corresponding path program 199 times [2021-06-05 16:00:56,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:56,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478609026] [2021-06-05 16:00:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:56,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:56,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478609026] [2021-06-05 16:00:56,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478609026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:56,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331541825] [2021-06-05 16:00:56,647 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:56,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:00:56,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:57,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331541825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:57,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:57,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 16:00:57,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521355203] [2021-06-05 16:00:57,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:00:57,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:57,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:00:57,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:00:57,271 INFO L87 Difference]: Start difference. First operand 13125 states and 43922 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:58,871 INFO L93 Difference]: Finished difference Result 18069 states and 59263 transitions. [2021-06-05 16:00:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:00:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:00:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:58,901 INFO L225 Difference]: With dead ends: 18069 [2021-06-05 16:00:58,901 INFO L226 Difference]: Without dead ends: 17949 [2021-06-05 16:00:58,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1540.3ms TimeCoverageRelationStatistics Valid=636, Invalid=2444, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:00:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17949 states. [2021-06-05 16:00:59,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17949 to 13125. [2021-06-05 16:00:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13125 states, 13124 states have (on average 3.3466930813776288) internal successors, (43922), 13124 states have internal predecessors, (43922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13125 states to 13125 states and 43922 transitions. [2021-06-05 16:00:59,156 INFO L78 Accepts]: Start accepts. Automaton has 13125 states and 43922 transitions. Word has length 36 [2021-06-05 16:00:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:59,156 INFO L482 AbstractCegarLoop]: Abstraction has 13125 states and 43922 transitions. [2021-06-05 16:00:59,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 13125 states and 43922 transitions. [2021-06-05 16:00:59,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:00:59,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:59,173 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:59,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1514,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:59,388 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:59,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2025403847, now seen corresponding path program 200 times [2021-06-05 16:00:59,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:59,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945320968] [2021-06-05 16:00:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:59,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:59,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945320968] [2021-06-05 16:00:59,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945320968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:59,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469416024] [2021-06-05 16:00:59,636 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:59,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:59,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:59,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:00:59,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:00,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469416024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:00,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:00,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 16:01:00,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643876322] [2021-06-05 16:01:00,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:01:00,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:00,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:01:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:01:00,171 INFO L87 Difference]: Start difference. First operand 13125 states and 43922 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:03,255 INFO L93 Difference]: Finished difference Result 15356 states and 50185 transitions. [2021-06-05 16:01:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 16:01:03,256 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:01:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:03,280 INFO L225 Difference]: With dead ends: 15356 [2021-06-05 16:01:03,280 INFO L226 Difference]: Without dead ends: 15090 [2021-06-05 16:01:03,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 2135.7ms TimeCoverageRelationStatistics Valid=804, Invalid=5202, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 16:01:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15090 states. [2021-06-05 16:01:03,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15090 to 13187. [2021-06-05 16:01:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13187 states, 13186 states have (on average 3.3462763537084785) internal successors, (44124), 13186 states have internal predecessors, (44124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13187 states to 13187 states and 44124 transitions. [2021-06-05 16:01:03,513 INFO L78 Accepts]: Start accepts. Automaton has 13187 states and 44124 transitions. Word has length 36 [2021-06-05 16:01:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:03,514 INFO L482 AbstractCegarLoop]: Abstraction has 13187 states and 44124 transitions. [2021-06-05 16:01:03,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 13187 states and 44124 transitions. [2021-06-05 16:01:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:01:03,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:03,534 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:03,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-06-05 16:01:03,736 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:03,737 INFO L82 PathProgramCache]: Analyzing trace with hash 310821857, now seen corresponding path program 201 times [2021-06-05 16:01:03,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:03,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374460959] [2021-06-05 16:01:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:03,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:03,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374460959] [2021-06-05 16:01:03,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374460959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:03,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673249681] [2021-06-05 16:01:03,972 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:03,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:01:03,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:03,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:01:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:04,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673249681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:04,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:04,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 16:01:04,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236227314] [2021-06-05 16:01:04,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:01:04,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:04,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:01:04,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:01:04,507 INFO L87 Difference]: Start difference. First operand 13187 states and 44124 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:07,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:07,063 INFO L93 Difference]: Finished difference Result 16136 states and 52589 transitions. [2021-06-05 16:01:07,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 16:01:07,064 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:01:07,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:07,088 INFO L225 Difference]: With dead ends: 16136 [2021-06-05 16:01:07,088 INFO L226 Difference]: Without dead ends: 15902 [2021-06-05 16:01:07,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 2053.2ms TimeCoverageRelationStatistics Valid=872, Invalid=4980, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:01:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15902 states. [2021-06-05 16:01:07,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15902 to 13200. [2021-06-05 16:01:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13200 states, 13199 states have (on average 3.3458595348132434) internal successors, (44162), 13199 states have internal predecessors, (44162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13200 states to 13200 states and 44162 transitions. [2021-06-05 16:01:07,339 INFO L78 Accepts]: Start accepts. Automaton has 13200 states and 44162 transitions. Word has length 36 [2021-06-05 16:01:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:07,339 INFO L482 AbstractCegarLoop]: Abstraction has 13200 states and 44162 transitions. [2021-06-05 16:01:07,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 13200 states and 44162 transitions. [2021-06-05 16:01:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:01:07,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:07,358 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:07,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1525,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:07,558 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:07,558 INFO L82 PathProgramCache]: Analyzing trace with hash -720710023, now seen corresponding path program 202 times [2021-06-05 16:01:07,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:07,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483661647] [2021-06-05 16:01:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:07,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:07,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483661647] [2021-06-05 16:01:07,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483661647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:07,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529866080] [2021-06-05 16:01:07,864 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:07,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:07,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:07,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:01:07,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:08,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529866080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:08,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:08,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 16:01:08,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89929756] [2021-06-05 16:01:08,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:01:08,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:08,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:01:08,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:01:08,470 INFO L87 Difference]: Start difference. First operand 13200 states and 44162 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:10,631 INFO L93 Difference]: Finished difference Result 17601 states and 57699 transitions. [2021-06-05 16:01:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:01:10,632 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:01:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:10,660 INFO L225 Difference]: With dead ends: 17601 [2021-06-05 16:01:10,660 INFO L226 Difference]: Without dead ends: 17408 [2021-06-05 16:01:10,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1927.3ms TimeCoverageRelationStatistics Valid=694, Invalid=3728, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:01:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17408 states. [2021-06-05 16:01:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17408 to 13131. [2021-06-05 16:01:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13131 states, 13130 states have (on average 3.3465346534653464) internal successors, (43940), 13130 states have internal predecessors, (43940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13131 states to 13131 states and 43940 transitions. [2021-06-05 16:01:10,923 INFO L78 Accepts]: Start accepts. Automaton has 13131 states and 43940 transitions. Word has length 36 [2021-06-05 16:01:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:10,923 INFO L482 AbstractCegarLoop]: Abstraction has 13131 states and 43940 transitions. [2021-06-05 16:01:10,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 13131 states and 43940 transitions. [2021-06-05 16:01:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:01:10,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:10,942 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:11,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1529,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:11,149 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:11,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1893894713, now seen corresponding path program 203 times [2021-06-05 16:01:11,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:11,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819669533] [2021-06-05 16:01:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:11,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:11,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819669533] [2021-06-05 16:01:11,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819669533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:11,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451945644] [2021-06-05 16:01:11,445 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:11,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:01:11,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:11,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:01:11,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:12,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451945644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:12,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:12,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 16:01:12,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956812363] [2021-06-05 16:01:12,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:01:12,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:01:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:01:12,060 INFO L87 Difference]: Start difference. First operand 13131 states and 43940 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:13,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:13,876 INFO L93 Difference]: Finished difference Result 15695 states and 51668 transitions. [2021-06-05 16:01:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:01:13,877 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:01:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:13,900 INFO L225 Difference]: With dead ends: 15695 [2021-06-05 16:01:13,900 INFO L226 Difference]: Without dead ends: 15627 [2021-06-05 16:01:13,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1534.8ms TimeCoverageRelationStatistics Valid=528, Invalid=2894, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:01:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15627 states. [2021-06-05 16:01:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15627 to 13309. [2021-06-05 16:01:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13309 states, 13308 states have (on average 3.3435527502254283) internal successors, (44496), 13308 states have internal predecessors, (44496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13309 states to 13309 states and 44496 transitions. [2021-06-05 16:01:14,143 INFO L78 Accepts]: Start accepts. Automaton has 13309 states and 44496 transitions. Word has length 36 [2021-06-05 16:01:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:14,143 INFO L482 AbstractCegarLoop]: Abstraction has 13309 states and 44496 transitions. [2021-06-05 16:01:14,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 13309 states and 44496 transitions. [2021-06-05 16:01:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:01:14,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:14,162 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:14,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1534,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:14,363 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:14,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1479370443, now seen corresponding path program 204 times [2021-06-05 16:01:14,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:14,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281204783] [2021-06-05 16:01:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:14,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:14,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281204783] [2021-06-05 16:01:14,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281204783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:14,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296090644] [2021-06-05 16:01:14,674 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:14,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:01:14,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:14,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:01:14,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:15,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296090644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:15,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:15,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 16:01:15,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783478970] [2021-06-05 16:01:15,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 16:01:15,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:15,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 16:01:15,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:01:15,301 INFO L87 Difference]: Start difference. First operand 13309 states and 44496 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:17,738 INFO L93 Difference]: Finished difference Result 16819 states and 55437 transitions. [2021-06-05 16:01:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:01:17,739 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:01:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:17,770 INFO L225 Difference]: With dead ends: 16819 [2021-06-05 16:01:17,770 INFO L226 Difference]: Without dead ends: 16699 [2021-06-05 16:01:17,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1810.1ms TimeCoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:01:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16699 states. [2021-06-05 16:01:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16699 to 13309. [2021-06-05 16:01:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13309 states, 13308 states have (on average 3.3435527502254283) internal successors, (44496), 13308 states have internal predecessors, (44496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13309 states to 13309 states and 44496 transitions. [2021-06-05 16:01:18,054 INFO L78 Accepts]: Start accepts. Automaton has 13309 states and 44496 transitions. Word has length 36 [2021-06-05 16:01:18,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:18,054 INFO L482 AbstractCegarLoop]: Abstraction has 13309 states and 44496 transitions. [2021-06-05 16:01:18,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 13309 states and 44496 transitions. [2021-06-05 16:01:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:01:18,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:18,076 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:18,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1538,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:18,277 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1549480479, now seen corresponding path program 205 times [2021-06-05 16:01:18,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:18,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756641758] [2021-06-05 16:01:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:18,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:18,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756641758] [2021-06-05 16:01:18,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756641758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:18,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955359217] [2021-06-05 16:01:18,617 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:18,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:01:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:19,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955359217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:19,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:19,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 16:01:19,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154322140] [2021-06-05 16:01:19,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:01:19,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:19,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:01:19,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:01:19,295 INFO L87 Difference]: Start difference. First operand 13309 states and 44496 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:21,629 INFO L93 Difference]: Finished difference Result 15829 states and 52209 transitions. [2021-06-05 16:01:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:01:21,629 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:01:21,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:21,661 INFO L225 Difference]: With dead ends: 15829 [2021-06-05 16:01:21,661 INFO L226 Difference]: Without dead ends: 15709 [2021-06-05 16:01:21,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1921.0ms TimeCoverageRelationStatistics Valid=646, Invalid=3514, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:01:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15709 states. [2021-06-05 16:01:21,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15709 to 13309. [2021-06-05 16:01:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13309 states, 13308 states have (on average 3.3435527502254283) internal successors, (44496), 13308 states have internal predecessors, (44496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13309 states to 13309 states and 44496 transitions. [2021-06-05 16:01:21,953 INFO L78 Accepts]: Start accepts. Automaton has 13309 states and 44496 transitions. Word has length 36 [2021-06-05 16:01:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:21,953 INFO L482 AbstractCegarLoop]: Abstraction has 13309 states and 44496 transitions. [2021-06-05 16:01:21,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 13309 states and 44496 transitions. [2021-06-05 16:01:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:01:21,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:21,972 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:22,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1548,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:22,172 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:22,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1172565493, now seen corresponding path program 206 times [2021-06-05 16:01:22,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:22,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006997223] [2021-06-05 16:01:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:22,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:22,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006997223] [2021-06-05 16:01:22,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006997223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:22,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873105898] [2021-06-05 16:01:22,419 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:01:22,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:22,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:22,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:22,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:23,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873105898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:23,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:23,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 16:01:23,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597727925] [2021-06-05 16:01:23,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:01:23,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:23,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:01:23,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:01:23,005 INFO L87 Difference]: Start difference. First operand 13309 states and 44496 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:26,145 INFO L93 Difference]: Finished difference Result 15446 states and 50486 transitions. [2021-06-05 16:01:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 16:01:26,145 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:01:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:26,166 INFO L225 Difference]: With dead ends: 15446 [2021-06-05 16:01:26,166 INFO L226 Difference]: Without dead ends: 15180 [2021-06-05 16:01:26,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 2376.8ms TimeCoverageRelationStatistics Valid=884, Invalid=5922, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 16:01:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15180 states. [2021-06-05 16:01:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15180 to 13367. [2021-06-05 16:01:26,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13367 states, 13366 states have (on average 3.3434086488104144) internal successors, (44688), 13366 states have internal predecessors, (44688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13367 states to 13367 states and 44688 transitions. [2021-06-05 16:01:26,383 INFO L78 Accepts]: Start accepts. Automaton has 13367 states and 44688 transitions. Word has length 36 [2021-06-05 16:01:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:26,383 INFO L482 AbstractCegarLoop]: Abstraction has 13367 states and 44688 transitions. [2021-06-05 16:01:26,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 13367 states and 44688 transitions. [2021-06-05 16:01:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:01:26,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:26,401 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:26,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1558,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:26,606 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:26,606 INFO L82 PathProgramCache]: Analyzing trace with hash -786176099, now seen corresponding path program 207 times [2021-06-05 16:01:26,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:26,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282227098] [2021-06-05 16:01:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:26,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:26,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282227098] [2021-06-05 16:01:26,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282227098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:26,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700919351] [2021-06-05 16:01:26,853 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:26,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:01:26,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:26,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:01:26,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:27,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700919351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:27,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:27,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 16:01:27,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598675707] [2021-06-05 16:01:27,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:01:27,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:27,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:01:27,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:01:27,398 INFO L87 Difference]: Start difference. First operand 13367 states and 44688 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:30,477 INFO L93 Difference]: Finished difference Result 16208 states and 52802 transitions. [2021-06-05 16:01:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 16:01:30,477 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-06-05 16:01:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:30,501 INFO L225 Difference]: With dead ends: 16208 [2021-06-05 16:01:30,501 INFO L226 Difference]: Without dead ends: 15974 [2021-06-05 16:01:30,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2039 ImplicationChecksByTransitivity, 2343.5ms TimeCoverageRelationStatistics Valid=994, Invalid=5978, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 16:01:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15974 states. [2021-06-05 16:01:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15974 to 13370. [2021-06-05 16:01:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13370 states, 13369 states have (on average 3.3428079886304136) internal successors, (44690), 13369 states have internal predecessors, (44690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13370 states to 13370 states and 44690 transitions. [2021-06-05 16:01:30,724 INFO L78 Accepts]: Start accepts. Automaton has 13370 states and 44690 transitions. Word has length 36 [2021-06-05 16:01:30,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:30,724 INFO L482 AbstractCegarLoop]: Abstraction has 13370 states and 44690 transitions. [2021-06-05 16:01:30,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 13370 states and 44690 transitions. [2021-06-05 16:01:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:01:30,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:30,741 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:30,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1562 [2021-06-05 16:01:30,941 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:30,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:30,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1817707979, now seen corresponding path program 208 times [2021-06-05 16:01:30,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:30,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378562191] [2021-06-05 16:01:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-06-05 16:01:31,021 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-06-05 16:01:31,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1566 [2021-06-05 16:01:31,022 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:01:31,023 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:01:31,024 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:01:31,024 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:01:31 BasicIcfg [2021-06-05 16:01:31,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:01:31,025 INFO L168 Benchmark]: Toolchain (without parser) took 791600.38 ms. Allocated memory was 367.0 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 346.1 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 508.8 MB. Max. memory is 16.0 GB. [2021-06-05 16:01:31,025 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 367.0 MB. Free memory is still 347.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:01:31,025 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.07 ms. Allocated memory is still 367.0 MB. Free memory was 346.0 MB in the beginning and 344.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:01:31,025 INFO L168 Benchmark]: Boogie Preprocessor took 11.36 ms. Allocated memory is still 367.0 MB. Free memory was 344.5 MB in the beginning and 343.6 MB in the end (delta: 927.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:01:31,025 INFO L168 Benchmark]: RCFGBuilder took 236.71 ms. Allocated memory is still 367.0 MB. Free memory was 343.5 MB in the beginning and 329.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 16:01:31,025 INFO L168 Benchmark]: TraceAbstraction took 791330.26 ms. Allocated memory was 367.0 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 328.6 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 492.0 MB. Max. memory is 16.0 GB. [2021-06-05 16:01:31,025 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 0.09 ms. Allocated memory is still 367.0 MB. Free memory is still 347.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.07 ms. Allocated memory is still 367.0 MB. Free memory was 346.0 MB in the beginning and 344.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.36 ms. Allocated memory is still 367.0 MB. Free memory was 344.5 MB in the beginning and 343.6 MB in the end (delta: 927.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 236.71 ms. Allocated memory is still 367.0 MB. Free memory was 343.5 MB in the beginning and 329.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 791330.26 ms. Allocated memory was 367.0 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 328.6 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 492.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 20 for 4ms.. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 20 for 4ms.. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 20 for 4ms.. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 20 for 4ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 47 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 791254.9ms, OverallIterations: 211, TraceHistogramMax: 4, EmptinessCheckTime: 2531.7ms, AutomataDifference: 529163.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6935 SDtfs, 76892 SDslu, 101192 SDs, 0 SdLazy, 437327 SolverSat, 36886 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 167283.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18525 GetRequests, 3879 SyntacticMatches, 394 SemanticMatches, 14252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330038 ImplicationChecksByTransitivity, 445896.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13370occurred in iteration=210, InterpolantAutomatonStates: 12668, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 40025.5ms AutomataMinimizationTime, 210 MinimizatonAttempts, 999167 StatesRemovedByMinimization, 208 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 652.1ms SsaConstructionTime, 1933.3ms SatisfiabilityAnalysisTime, 170957.1ms InterpolantComputationTime, 14638 NumberOfCodeBlocks, 14638 NumberOfCodeBlocksAsserted, 880 NumberOfCheckSat, 14222 ConstructedInterpolants, 0 QuantifiedInterpolants, 337117 SizeOfPredicates, 1391 NumberOfNonLiveVariables, 13244 ConjunctsInSsa, 4389 ConjunctsInUnsatCore, 416 InterpolantComputations, 4 PerfectInterpolantSequences, 136/7704 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown