/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:40:51,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:40:51,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:40:51,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-21 20:40:51,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-21 20:40:51,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-21 20:40:51,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-21 20:40:51,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-21 20:40:51,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-21 20:40:51,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-21 20:40:51,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-21 20:40:51,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-21 20:40:51,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 20:40:51,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 20:40:51,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 20:40:51,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 20:40:51,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 20:40:51,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 20:40:51,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 20:40:51,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 20:40:51,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 20:40:51,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 20:40:51,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 20:40:51,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 20:40:51,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 20:40:51,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-21 20:40:51,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-21 20:40:51,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-21 20:40:51,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-21 20:40:51,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-21 20:40:51,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-21 20:40:51,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-21 20:40:51,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-21 20:40:51,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 20:40:51,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 20:40:51,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 20:40:51,781 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.epf [2021-05-21 20:40:51,800 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:40:51,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:40:51,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:40:51,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:40:51,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:40:51,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:40:51,803 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:40:51,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:40:51,803 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:40:51,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:40:51,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:40:51,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:40:51,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:40:51,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:40:51,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:40:51,804 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:40:51,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:40:51,804 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:40:51,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:40:51,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:40:51,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:40:51,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:40:51,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:40:51,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:40:51,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:40:51,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:40:51,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:40:51,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:40:51,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:40:51,806 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:40:51,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:40:51,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:40:52,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:40:52,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:40:52,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:40:52,104 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:40:52,105 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:40:52,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl [2021-05-21 20:40:52,106 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl' [2021-05-21 20:40:52,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:40:52,164 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:40:52,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:40:52,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:40:52,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:40:52,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:40:52" (1/1) ... [2021-05-21 20:40:52,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:40:52" (1/1) ... [2021-05-21 20:40:52,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:40:52,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:40:52,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:40:52,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:40:52,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:40:52" (1/1) ... [2021-05-21 20:40:52,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:40:52" (1/1) ... [2021-05-21 20:40:52,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:40:52" (1/1) ... [2021-05-21 20:40:52,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:40:52" (1/1) ... [2021-05-21 20:40:52,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:40:52" (1/1) ... [2021-05-21 20:40:52,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:40:52" (1/1) ... [2021-05-21 20:40:52,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:40:52" (1/1) ... [2021-05-21 20:40:52,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:40:52,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:40:52,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:40:52,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:40:52,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:40:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:40:52,293 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:40:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:40:52,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:40:52,294 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:40:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:40:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:40:52,294 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:40:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:40:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:40:52,295 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 20:40:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 20:40:52,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 20:40:52,296 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-21 20:40:52,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-21 20:40:52,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-21 20:40:52,296 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-05-21 20:40:52,297 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-05-21 20:40:52,297 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-05-21 20:40:52,297 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-05-21 20:40:52,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-05-21 20:40:52,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-05-21 20:40:52,299 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:40:52,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:40:52,490 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-21 20:40:52,491 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-21 20:40:52,491 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-21 20:40:52,491 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-05-21 20:40:52,492 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-05-21 20:40:52,492 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-05-21 20:40:52,492 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-05-21 20:40:52,493 INFO L202 PluginConnector]: Adding new model exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:40:52 BoogieIcfgContainer [2021-05-21 20:40:52,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:40:52,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:40:52,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:40:52,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:40:52,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:40:52" (1/2) ... [2021-05-21 20:40:52,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547f147d and model type exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:40:52, skipping insertion in model container [2021-05-21 20:40:52,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:40:52" (2/2) ... [2021-05-21 20:40:52,499 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3-opt.wvr.bpl [2021-05-21 20:40:52,504 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:40:52,504 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:40:52,504 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:40:52,505 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:40:52,624 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-05-21 20:40:52,643 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-05-21 20:40:52,662 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:40:52,663 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:40:52,663 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:40:52,663 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:40:52,663 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:40:52,663 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:40:52,663 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:40:52,663 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:40:52,673 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 35 transitions, 118 flow [2021-05-21 20:40:52,711 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:52,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:40:52,727 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:52,728 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:52,728 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:40:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:52,737 INFO L82 PathProgramCache]: Analyzing trace with hash 336800480, now seen corresponding path program 1 times [2021-05-21 20:40:52,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:52,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714203745] [2021-05-21 20:40:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:52,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:52,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714203745] [2021-05-21 20:40:52,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714203745] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:40:52,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:40:52,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 20:40:52,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229134592] [2021-05-21 20:40:52,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:40:52,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:52,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:40:52,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:40:52,955 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) [2021-05-21 20:40:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:53,008 INFO L93 Difference]: Finished difference Result 382 states and 2054 transitions. [2021-05-21 20:40:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:40:53,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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 [2021-05-21 20:40:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:53,032 INFO L225 Difference]: With dead ends: 382 [2021-05-21 20:40:53,032 INFO L226 Difference]: Without dead ends: 304 [2021-05-21 20:40:53,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:40:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-21 20:40:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-05-21 20:40:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 5.458745874587459) internal successors, (1654), 303 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1654 transitions. [2021-05-21 20:40:53,123 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1654 transitions. Word has length 21 [2021-05-21 20:40:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:53,123 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 1654 transitions. [2021-05-21 20:40:53,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) [2021-05-21 20:40:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1654 transitions. [2021-05-21 20:40:53,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:40:53,132 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:53,132 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] [2021-05-21 20:40:53,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:40:53,132 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:40:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:53,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1957873019, now seen corresponding path program 1 times [2021-05-21 20:40:53,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:53,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646630612] [2021-05-21 20:40:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:40:53,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:53,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646630612] [2021-05-21 20:40:53,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646630612] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:40:53,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:40:53,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 20:40:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129161141] [2021-05-21 20:40:53,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:40:53,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:53,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:40:53,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:40:53,196 INFO L87 Difference]: Start difference. First operand 304 states and 1654 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:53,220 INFO L93 Difference]: Finished difference Result 551 states and 3079 transitions. [2021-05-21 20:40:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:40:53,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:40:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:53,228 INFO L225 Difference]: With dead ends: 551 [2021-05-21 20:40:53,228 INFO L226 Difference]: Without dead ends: 502 [2021-05-21 20:40:53,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:40:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-05-21 20:40:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2021-05-21 20:40:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 5.598802395209581) internal successors, (2805), 501 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 2805 transitions. [2021-05-21 20:40:53,268 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 2805 transitions. Word has length 22 [2021-05-21 20:40:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:53,269 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 2805 transitions. [2021-05-21 20:40:53,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 2805 transitions. [2021-05-21 20:40:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:40:53,272 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:53,272 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] [2021-05-21 20:40:53,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 20:40:53,273 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:40:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1560108314, now seen corresponding path program 1 times [2021-05-21 20:40:53,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:53,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2394681] [2021-05-21 20:40:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:40:53,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:53,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2394681] [2021-05-21 20:40:53,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2394681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:40:53,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:40:53,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 20:40:53,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565376880] [2021-05-21 20:40:53,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:40:53,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:53,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:40:53,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:40:53,342 INFO L87 Difference]: Start difference. First operand 502 states and 2805 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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) [2021-05-21 20:40:53,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:53,361 INFO L93 Difference]: Finished difference Result 989 states and 5577 transitions. [2021-05-21 20:40:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:40:53,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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 [2021-05-21 20:40:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:53,371 INFO L225 Difference]: With dead ends: 989 [2021-05-21 20:40:53,372 INFO L226 Difference]: Without dead ends: 859 [2021-05-21 20:40:53,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:40:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-05-21 20:40:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-05-21 20:40:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 5.6678321678321675) internal successors, (4863), 858 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 4863 transitions. [2021-05-21 20:40:53,408 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 4863 transitions. Word has length 23 [2021-05-21 20:40:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:53,409 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 4863 transitions. [2021-05-21 20:40:53,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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) [2021-05-21 20:40:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 4863 transitions. [2021-05-21 20:40:53,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:40:53,412 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:53,412 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] [2021-05-21 20:40:53,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 20:40:53,413 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:40:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:53,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1404106583, now seen corresponding path program 1 times [2021-05-21 20:40:53,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:53,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425005803] [2021-05-21 20:40:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:40:53,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:53,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425005803] [2021-05-21 20:40:53,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425005803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:53,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223671358] [2021-05-21 20:40:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-21 20:40:53,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:40:53,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223671358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:53,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:53,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-05-21 20:40:53,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170264284] [2021-05-21 20:40:53,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:40:53,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:53,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:40:53,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:40:53,773 INFO L87 Difference]: Start difference. First operand 859 states and 4863 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:53,938 INFO L93 Difference]: Finished difference Result 2168 states and 12284 transitions. [2021-05-21 20:40:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:40:53,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:40:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:53,947 INFO L225 Difference]: With dead ends: 2168 [2021-05-21 20:40:53,947 INFO L226 Difference]: Without dead ends: 1000 [2021-05-21 20:40:53,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:40:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-05-21 20:40:53,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 614. [2021-05-21 20:40:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 5.634584013050571) internal successors, (3454), 613 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 3454 transitions. [2021-05-21 20:40:53,976 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 3454 transitions. Word has length 24 [2021-05-21 20:40:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:53,976 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 3454 transitions. [2021-05-21 20:40:53,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 3454 transitions. [2021-05-21 20:40:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:40:53,979 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:53,979 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] [2021-05-21 20:40:54,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:54,193 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:40:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1358128455, now seen corresponding path program 1 times [2021-05-21 20:40:54,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:54,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128219009] [2021-05-21 20:40:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:40:54,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:54,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128219009] [2021-05-21 20:40:54,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128219009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:54,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402867024] [2021-05-21 20:40:54,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:54,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-21 20:40:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:40:54,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402867024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:54,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:54,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-05-21 20:40:54,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706881540] [2021-05-21 20:40:54,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:40:54,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:54,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:40:54,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:40:54,350 INFO L87 Difference]: Start difference. First operand 614 states and 3454 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:54,468 INFO L93 Difference]: Finished difference Result 1659 states and 9450 transitions. [2021-05-21 20:40:54,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:40:54,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:40:54,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:54,477 INFO L225 Difference]: With dead ends: 1659 [2021-05-21 20:40:54,478 INFO L226 Difference]: Without dead ends: 930 [2021-05-21 20:40:54,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:40:54,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-05-21 20:40:54,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 760. [2021-05-21 20:40:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 5.664031620553359) internal successors, (4299), 759 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 4299 transitions. [2021-05-21 20:40:54,520 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 4299 transitions. Word has length 24 [2021-05-21 20:40:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:54,520 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 4299 transitions. [2021-05-21 20:40:54,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 4299 transitions. [2021-05-21 20:40:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:40:54,524 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:54,525 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] [2021-05-21 20:40:54,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:54,729 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:40:54,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:54,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1283985542, now seen corresponding path program 1 times [2021-05-21 20:40:54,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:54,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482375281] [2021-05-21 20:40:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:40:54,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:54,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482375281] [2021-05-21 20:40:54,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482375281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:54,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718102267] [2021-05-21 20:40:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:54,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-21 20:40:54,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:40:54,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718102267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:54,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:54,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-05-21 20:40:54,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877148880] [2021-05-21 20:40:54,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:40:54,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:54,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:40:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:40:54,917 INFO L87 Difference]: Start difference. First operand 760 states and 4299 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:55,071 INFO L93 Difference]: Finished difference Result 2539 states and 14502 transitions. [2021-05-21 20:40:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:40:55,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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 25 [2021-05-21 20:40:55,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:55,086 INFO L225 Difference]: With dead ends: 2539 [2021-05-21 20:40:55,086 INFO L226 Difference]: Without dead ends: 1460 [2021-05-21 20:40:55,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:40:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-05-21 20:40:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2021-05-21 20:40:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 5.748457847840987) internal successors, (8387), 1459 states have internal predecessors, (8387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 8387 transitions. [2021-05-21 20:40:55,146 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 8387 transitions. Word has length 25 [2021-05-21 20:40:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:55,148 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 8387 transitions. [2021-05-21 20:40:55,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 8387 transitions. [2021-05-21 20:40:55,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:40:55,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:55,156 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] [2021-05-21 20:40:55,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:55,380 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:40:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:55,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1790951632, now seen corresponding path program 1 times [2021-05-21 20:40:55,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:55,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499015017] [2021-05-21 20:40:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:55,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:55,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499015017] [2021-05-21 20:40:55,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499015017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:55,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266972888] [2021-05-21 20:40:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:40:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:55,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266972888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:55,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:55,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-05-21 20:40:55,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374366304] [2021-05-21 20:40:55,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:40:55,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:55,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:40:55,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:40:55,615 INFO L87 Difference]: Start difference. First operand 1460 states and 8387 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:55,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:55,889 INFO L93 Difference]: Finished difference Result 7036 states and 40197 transitions. [2021-05-21 20:40:55,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:40:55,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 20:40:55,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:55,954 INFO L225 Difference]: With dead ends: 7036 [2021-05-21 20:40:55,954 INFO L226 Difference]: Without dead ends: 5971 [2021-05-21 20:40:55,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:40:55,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-05-21 20:40:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 3455. [2021-05-21 20:40:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3454 states have (on average 6.335552982049798) internal successors, (21883), 3454 states have internal predecessors, (21883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 21883 transitions. [2021-05-21 20:40:56,214 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 21883 transitions. Word has length 27 [2021-05-21 20:40:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:56,214 INFO L482 AbstractCegarLoop]: Abstraction has 3455 states and 21883 transitions. [2021-05-21 20:40:56,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 21883 transitions. [2021-05-21 20:40:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:40:56,231 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:56,231 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] [2021-05-21 20:40:56,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:56,455 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:40:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:56,455 INFO L82 PathProgramCache]: Analyzing trace with hash -97672488, now seen corresponding path program 2 times [2021-05-21 20:40:56,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:56,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993220536] [2021-05-21 20:40:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:40:56,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:56,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993220536] [2021-05-21 20:40:56,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993220536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:56,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674901117] [2021-05-21 20:40:56,523 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:56,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:40:56,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:40:56,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:56,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674901117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:56,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:56,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-05-21 20:40:56,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629153196] [2021-05-21 20:40:56,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:40:56,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:56,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:40:56,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:40:56,702 INFO L87 Difference]: Start difference. First operand 3455 states and 21883 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:57,002 INFO L93 Difference]: Finished difference Result 12126 states and 75417 transitions. [2021-05-21 20:40:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:40:57,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 20:40:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:57,140 INFO L225 Difference]: With dead ends: 12126 [2021-05-21 20:40:57,140 INFO L226 Difference]: Without dead ends: 10635 [2021-05-21 20:40:57,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:40:57,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10635 states. [2021-05-21 20:40:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10635 to 6709. [2021-05-21 20:40:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 6708 states have (on average 6.719886702444842) internal successors, (45077), 6708 states have internal predecessors, (45077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 45077 transitions. [2021-05-21 20:40:57,603 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 45077 transitions. Word has length 27 [2021-05-21 20:40:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:57,603 INFO L482 AbstractCegarLoop]: Abstraction has 6709 states and 45077 transitions. [2021-05-21 20:40:57,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 45077 transitions. [2021-05-21 20:40:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:40:57,634 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:57,635 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 20:40:57,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:57,858 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:40:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:57,889 INFO L82 PathProgramCache]: Analyzing trace with hash 329078829, now seen corresponding path program 3 times [2021-05-21 20:40:57,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:57,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511220684] [2021-05-21 20:40:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:57,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:57,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511220684] [2021-05-21 20:40:57,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511220684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:57,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521703156] [2021-05-21 20:40:57,927 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:58,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:40:58,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:40:58,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:58,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521703156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:58,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:58,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:40:58,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138742492] [2021-05-21 20:40:58,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:40:58,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:58,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:40:58,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:40:58,115 INFO L87 Difference]: Start difference. First operand 6709 states and 45077 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:58,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:58,311 INFO L93 Difference]: Finished difference Result 10641 states and 67958 transitions. [2021-05-21 20:40:58,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:40:58,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 28 [2021-05-21 20:40:58,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:58,367 INFO L225 Difference]: With dead ends: 10641 [2021-05-21 20:40:58,367 INFO L226 Difference]: Without dead ends: 8426 [2021-05-21 20:40:58,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:40:58,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8426 states. [2021-05-21 20:40:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8426 to 6226. [2021-05-21 20:40:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.617510040160642) internal successors, (41194), 6225 states have internal predecessors, (41194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 41194 transitions. [2021-05-21 20:40:58,758 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 41194 transitions. Word has length 28 [2021-05-21 20:40:58,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:58,759 INFO L482 AbstractCegarLoop]: Abstraction has 6226 states and 41194 transitions. [2021-05-21 20:40:58,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 41194 transitions. [2021-05-21 20:40:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:40:58,780 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:58,780 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 20:40:58,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:58,997 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:40:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:58,998 INFO L82 PathProgramCache]: Analyzing trace with hash 589935477, now seen corresponding path program 4 times [2021-05-21 20:40:58,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:58,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393854396] [2021-05-21 20:40:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:59,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:59,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393854396] [2021-05-21 20:40:59,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393854396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:59,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126125323] [2021-05-21 20:40:59,043 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:59,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:40:59,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:59,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:40:59,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:59,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126125323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:59,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:59,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:40:59,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146373970] [2021-05-21 20:40:59,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:40:59,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:59,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:40:59,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:40:59,194 INFO L87 Difference]: Start difference. First operand 6226 states and 41194 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:59,439 INFO L93 Difference]: Finished difference Result 11692 states and 73874 transitions. [2021-05-21 20:40:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:40:59,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:40:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:59,548 INFO L225 Difference]: With dead ends: 11692 [2021-05-21 20:40:59,548 INFO L226 Difference]: Without dead ends: 7762 [2021-05-21 20:40:59,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:40:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-05-21 20:40:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 6226. [2021-05-21 20:40:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.525622489959839) internal successors, (40622), 6225 states have internal predecessors, (40622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 40622 transitions. [2021-05-21 20:40:59,791 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 40622 transitions. Word has length 28 [2021-05-21 20:40:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:59,793 INFO L482 AbstractCegarLoop]: Abstraction has 6226 states and 40622 transitions. [2021-05-21 20:40:59,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 40622 transitions. [2021-05-21 20:40:59,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:40:59,814 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:59,814 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 20:41:00,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 20:41:00,037 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:00,037 INFO L82 PathProgramCache]: Analyzing trace with hash 913623149, now seen corresponding path program 5 times [2021-05-21 20:41:00,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:00,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054355599] [2021-05-21 20:41:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:41:00,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:00,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054355599] [2021-05-21 20:41:00,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054355599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:00,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272745058] [2021-05-21 20:41:00,174 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:00,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:41:00,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:00,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:41:00,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:41:00,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272745058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:00,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:00,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:41:00,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785293493] [2021-05-21 20:41:00,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:41:00,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:00,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:41:00,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:00,344 INFO L87 Difference]: Start difference. First operand 6226 states and 40622 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:41:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:00,522 INFO L93 Difference]: Finished difference Result 10638 states and 67096 transitions. [2021-05-21 20:41:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:41:00,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 28 [2021-05-21 20:41:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:00,551 INFO L225 Difference]: With dead ends: 10638 [2021-05-21 20:41:00,552 INFO L226 Difference]: Without dead ends: 7656 [2021-05-21 20:41:00,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7656 states. [2021-05-21 20:41:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7656 to 5654. [2021-05-21 20:41:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 5653 states have (on average 6.388466301079073) internal successors, (36114), 5653 states have internal predecessors, (36114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 36114 transitions. [2021-05-21 20:41:00,840 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 36114 transitions. Word has length 28 [2021-05-21 20:41:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:00,840 INFO L482 AbstractCegarLoop]: Abstraction has 5654 states and 36114 transitions. [2021-05-21 20:41:00,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:41:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 36114 transitions. [2021-05-21 20:41:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:41:00,858 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:00,858 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 20:41:01,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-21 20:41:01,073 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:01,073 INFO L82 PathProgramCache]: Analyzing trace with hash -317378095, now seen corresponding path program 6 times [2021-05-21 20:41:01,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:01,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267243013] [2021-05-21 20:41:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:41:01,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:01,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267243013] [2021-05-21 20:41:01,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267243013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:01,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922236375] [2021-05-21 20:41:01,100 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:01,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:41:01,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:01,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:41:01,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:41:01,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922236375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:01,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:01,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:41:01,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311504298] [2021-05-21 20:41:01,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:41:01,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:01,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:41:01,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:01,272 INFO L87 Difference]: Start difference. First operand 5654 states and 36114 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:41:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:01,458 INFO L93 Difference]: Finished difference Result 8816 states and 55756 transitions. [2021-05-21 20:41:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:41:01,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 28 [2021-05-21 20:41:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:01,485 INFO L225 Difference]: With dead ends: 8816 [2021-05-21 20:41:01,485 INFO L226 Difference]: Without dead ends: 7190 [2021-05-21 20:41:01,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7190 states. [2021-05-21 20:41:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7190 to 5368. [2021-05-21 20:41:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 6.3355692193031485) internal successors, (34003), 5367 states have internal predecessors, (34003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 34003 transitions. [2021-05-21 20:41:01,657 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 34003 transitions. Word has length 28 [2021-05-21 20:41:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:01,657 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 34003 transitions. [2021-05-21 20:41:01,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:41:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 34003 transitions. [2021-05-21 20:41:01,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:41:01,675 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:01,676 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 20:41:01,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:01,889 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:01,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:01,889 INFO L82 PathProgramCache]: Analyzing trace with hash -451391601, now seen corresponding path program 7 times [2021-05-21 20:41:01,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:01,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519900828] [2021-05-21 20:41:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:41:01,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:01,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519900828] [2021-05-21 20:41:01,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519900828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:01,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582377616] [2021-05-21 20:41:01,928 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:01,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:41:01,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:41:02,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582377616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:02,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:02,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:41:02,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994409785] [2021-05-21 20:41:02,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:41:02,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:41:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:02,088 INFO L87 Difference]: Start difference. First operand 5368 states and 34003 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:02,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:02,273 INFO L93 Difference]: Finished difference Result 7762 states and 48993 transitions. [2021-05-21 20:41:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:41:02,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:02,293 INFO L225 Difference]: With dead ends: 7762 [2021-05-21 20:41:02,293 INFO L226 Difference]: Without dead ends: 6512 [2021-05-21 20:41:02,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2021-05-21 20:41:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 5940. [2021-05-21 20:41:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 5939 states have (on average 6.339956221586125) internal successors, (37653), 5939 states have internal predecessors, (37653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 37653 transitions. [2021-05-21 20:41:02,467 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 37653 transitions. Word has length 28 [2021-05-21 20:41:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:02,467 INFO L482 AbstractCegarLoop]: Abstraction has 5940 states and 37653 transitions. [2021-05-21 20:41:02,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 37653 transitions. [2021-05-21 20:41:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:41:02,485 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:02,485 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] [2021-05-21 20:41:02,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:02,701 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:02,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1791557168, now seen corresponding path program 8 times [2021-05-21 20:41:02,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:02,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928494139] [2021-05-21 20:41:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:41:02,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:02,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928494139] [2021-05-21 20:41:02,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928494139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:02,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310554614] [2021-05-21 20:41:02,744 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:02,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:41:02,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:02,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:41:02,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:41:03,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310554614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:03,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:03,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-05-21 20:41:03,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725500024] [2021-05-21 20:41:03,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:41:03,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:03,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:41:03,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:41:03,058 INFO L87 Difference]: Start difference. First operand 5940 states and 37653 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:03,214 INFO L93 Difference]: Finished difference Result 13716 states and 86495 transitions. [2021-05-21 20:41:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:41:03,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-21 20:41:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:03,266 INFO L225 Difference]: With dead ends: 13716 [2021-05-21 20:41:03,267 INFO L226 Difference]: Without dead ends: 12948 [2021-05-21 20:41:03,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:41:03,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12948 states. [2021-05-21 20:41:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12948 to 9586. [2021-05-21 20:41:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9586 states, 9585 states have (on average 6.6200312989045385) internal successors, (63453), 9585 states have internal predecessors, (63453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9586 states to 9586 states and 63453 transitions. [2021-05-21 20:41:03,803 INFO L78 Accepts]: Start accepts. Automaton has 9586 states and 63453 transitions. Word has length 29 [2021-05-21 20:41:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:03,803 INFO L482 AbstractCegarLoop]: Abstraction has 9586 states and 63453 transitions. [2021-05-21 20:41:03,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 9586 states and 63453 transitions. [2021-05-21 20:41:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:41:03,827 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:03,827 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] [2021-05-21 20:41:04,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 20:41:04,028 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:04,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:04,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1011086738, now seen corresponding path program 9 times [2021-05-21 20:41:04,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:04,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044896603] [2021-05-21 20:41:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 20:41:04,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:04,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044896603] [2021-05-21 20:41:04,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044896603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:04,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149751175] [2021-05-21 20:41:04,079 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:04,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:41:04,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:04,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:41:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:04,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149751175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:04,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:04,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-05-21 20:41:04,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731314997] [2021-05-21 20:41:04,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:41:04,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:04,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:41:04,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:04,207 INFO L87 Difference]: Start difference. First operand 9586 states and 63453 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:41:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:04,593 INFO L93 Difference]: Finished difference Result 25346 states and 162331 transitions. [2021-05-21 20:41:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:41:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 29 [2021-05-21 20:41:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:04,925 INFO L225 Difference]: With dead ends: 25346 [2021-05-21 20:41:04,925 INFO L226 Difference]: Without dead ends: 23242 [2021-05-21 20:41:04,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:41:04,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23242 states. [2021-05-21 20:41:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23242 to 14272. [2021-05-21 20:41:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14272 states, 14271 states have (on average 6.922219886483077) internal successors, (98787), 14271 states have internal predecessors, (98787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14272 states to 14272 states and 98787 transitions. [2021-05-21 20:41:05,579 INFO L78 Accepts]: Start accepts. Automaton has 14272 states and 98787 transitions. Word has length 29 [2021-05-21 20:41:05,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:05,579 INFO L482 AbstractCegarLoop]: Abstraction has 14272 states and 98787 transitions. [2021-05-21 20:41:05,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:41:05,579 INFO L276 IsEmpty]: Start isEmpty. Operand 14272 states and 98787 transitions. [2021-05-21 20:41:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:41:05,619 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:05,619 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 20:41:05,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 20:41:05,819 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:05,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:05,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1639971327, now seen corresponding path program 10 times [2021-05-21 20:41:05,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:05,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744540837] [2021-05-21 20:41:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:05,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:05,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744540837] [2021-05-21 20:41:05,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744540837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:05,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391524387] [2021-05-21 20:41:05,852 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:05,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:41:05,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:05,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:41:05,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:06,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391524387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:06,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:06,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:41:06,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923321517] [2021-05-21 20:41:06,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:41:06,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:06,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:41:06,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:06,001 INFO L87 Difference]: Start difference. First operand 14272 states and 98787 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:06,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:06,189 INFO L93 Difference]: Finished difference Result 19626 states and 131324 transitions. [2021-05-21 20:41:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:41:06,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:41:06,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:06,248 INFO L225 Difference]: With dead ends: 19626 [2021-05-21 20:41:06,249 INFO L226 Difference]: Without dead ends: 16783 [2021-05-21 20:41:06,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-05-21 20:41:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 13215. [2021-05-21 20:41:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13215 states, 13214 states have (on average 6.851672468593915) internal successors, (90538), 13214 states have internal predecessors, (90538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13215 states to 13215 states and 90538 transitions. [2021-05-21 20:41:06,891 INFO L78 Accepts]: Start accepts. Automaton has 13215 states and 90538 transitions. Word has length 30 [2021-05-21 20:41:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:06,891 INFO L482 AbstractCegarLoop]: Abstraction has 13215 states and 90538 transitions. [2021-05-21 20:41:06,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 13215 states and 90538 transitions. [2021-05-21 20:41:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:41:06,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:06,932 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 20:41:07,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 20:41:07,132 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1256865581, now seen corresponding path program 11 times [2021-05-21 20:41:07,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:07,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9676550] [2021-05-21 20:41:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:07,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:07,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9676550] [2021-05-21 20:41:07,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9676550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:07,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489049619] [2021-05-21 20:41:07,176 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:07,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:41:07,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:07,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:41:07,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:07,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489049619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:07,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:07,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:41:07,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142775621] [2021-05-21 20:41:07,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:41:07,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:07,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:41:07,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:07,316 INFO L87 Difference]: Start difference. First operand 13215 states and 90538 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:07,807 INFO L93 Difference]: Finished difference Result 20352 states and 135504 transitions. [2021-05-21 20:41:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:41:07,808 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:41:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:07,886 INFO L225 Difference]: With dead ends: 20352 [2021-05-21 20:41:07,886 INFO L226 Difference]: Without dead ends: 15593 [2021-05-21 20:41:07,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:07,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15593 states. [2021-05-21 20:41:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15593 to 13215. [2021-05-21 20:41:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13215 states, 13214 states have (on average 6.761767822006962) internal successors, (89350), 13214 states have internal predecessors, (89350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13215 states to 13215 states and 89350 transitions. [2021-05-21 20:41:08,307 INFO L78 Accepts]: Start accepts. Automaton has 13215 states and 89350 transitions. Word has length 30 [2021-05-21 20:41:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:08,307 INFO L482 AbstractCegarLoop]: Abstraction has 13215 states and 89350 transitions. [2021-05-21 20:41:08,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 13215 states and 89350 transitions. [2021-05-21 20:41:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:41:08,340 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:08,340 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 20:41:08,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:08,540 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:08,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:08,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1618072385, now seen corresponding path program 12 times [2021-05-21 20:41:08,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:08,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721978595] [2021-05-21 20:41:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:08,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:08,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721978595] [2021-05-21 20:41:08,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721978595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:08,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526132962] [2021-05-21 20:41:08,586 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:08,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:41:08,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:08,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:41:08,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:08,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526132962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:08,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:08,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:41:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137853243] [2021-05-21 20:41:08,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:41:08,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:08,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:41:08,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:08,732 INFO L87 Difference]: Start difference. First operand 13215 states and 89350 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:41:09,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:09,206 INFO L93 Difference]: Finished difference Result 19162 states and 126426 transitions. [2021-05-21 20:41:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:41:09,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 30 [2021-05-21 20:41:09,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:09,277 INFO L225 Difference]: With dead ends: 19162 [2021-05-21 20:41:09,277 INFO L226 Difference]: Without dead ends: 16185 [2021-05-21 20:41:09,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:09,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16185 states. [2021-05-21 20:41:09,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16185 to 12027. [2021-05-21 20:41:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12027 states, 12026 states have (on average 6.625644437053052) internal successors, (79680), 12026 states have internal predecessors, (79680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12027 states to 12027 states and 79680 transitions. [2021-05-21 20:41:09,632 INFO L78 Accepts]: Start accepts. Automaton has 12027 states and 79680 transitions. Word has length 30 [2021-05-21 20:41:09,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:09,632 INFO L482 AbstractCegarLoop]: Abstraction has 12027 states and 79680 transitions. [2021-05-21 20:41:09,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:41:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 12027 states and 79680 transitions. [2021-05-21 20:41:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:41:09,664 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:09,664 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 20:41:09,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 20:41:09,870 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:09,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:09,871 INFO L82 PathProgramCache]: Analyzing trace with hash 937421221, now seen corresponding path program 13 times [2021-05-21 20:41:09,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:09,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679863299] [2021-05-21 20:41:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:09,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:09,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679863299] [2021-05-21 20:41:09,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679863299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:09,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807884983] [2021-05-21 20:41:09,916 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:41:09,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:10,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807884983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:10,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:10,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:41:10,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864000779] [2021-05-21 20:41:10,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:41:10,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:10,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:41:10,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:10,038 INFO L87 Difference]: Start difference. First operand 12027 states and 79680 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:41:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:10,385 INFO L93 Difference]: Finished difference Result 16783 states and 110645 transitions. [2021-05-21 20:41:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:41:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 30 [2021-05-21 20:41:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:10,439 INFO L225 Difference]: With dead ends: 16783 [2021-05-21 20:41:10,439 INFO L226 Difference]: Without dead ends: 14405 [2021-05-21 20:41:10,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14405 states. [2021-05-21 20:41:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14405 to 11433. [2021-05-21 20:41:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11433 states, 11432 states have (on average 6.57295311406578) internal successors, (75142), 11432 states have internal predecessors, (75142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11433 states to 11433 states and 75142 transitions. [2021-05-21 20:41:10,771 INFO L78 Accepts]: Start accepts. Automaton has 11433 states and 75142 transitions. Word has length 30 [2021-05-21 20:41:10,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:10,772 INFO L482 AbstractCegarLoop]: Abstraction has 11433 states and 75142 transitions. [2021-05-21 20:41:10,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:41:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 11433 states and 75142 transitions. [2021-05-21 20:41:10,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:41:10,804 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:10,804 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 20:41:11,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:11,017 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:11,017 INFO L82 PathProgramCache]: Analyzing trace with hash -73696029, now seen corresponding path program 14 times [2021-05-21 20:41:11,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:11,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067660970] [2021-05-21 20:41:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:11,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:11,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067660970] [2021-05-21 20:41:11,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067660970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082686422] [2021-05-21 20:41:11,048 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:11,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:41:11,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:41:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:11,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082686422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:11,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:11,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:41:11,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436694012] [2021-05-21 20:41:11,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:41:11,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:11,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:41:11,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:11,159 INFO L87 Difference]: Start difference. First operand 11433 states and 75142 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:11,510 INFO L93 Difference]: Finished difference Result 15000 states and 98811 transitions. [2021-05-21 20:41:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:41:11,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:11,577 INFO L225 Difference]: With dead ends: 15000 [2021-05-21 20:41:11,577 INFO L226 Difference]: Without dead ends: 13809 [2021-05-21 20:41:11,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13809 states. [2021-05-21 20:41:11,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13809 to 12621. [2021-05-21 20:41:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12621 states, 12620 states have (on average 6.579239302694137) internal successors, (83030), 12620 states have internal predecessors, (83030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12621 states to 12621 states and 83030 transitions. [2021-05-21 20:41:11,946 INFO L78 Accepts]: Start accepts. Automaton has 12621 states and 83030 transitions. Word has length 30 [2021-05-21 20:41:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:11,947 INFO L482 AbstractCegarLoop]: Abstraction has 12621 states and 83030 transitions. [2021-05-21 20:41:11,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 12621 states and 83030 transitions. [2021-05-21 20:41:11,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 20:41:11,982 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:11,982 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] [2021-05-21 20:41:12,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:12,183 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:12,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:12,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1100522568, now seen corresponding path program 15 times [2021-05-21 20:41:12,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:12,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509491216] [2021-05-21 20:41:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-21 20:41:12,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:12,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509491216] [2021-05-21 20:41:12,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509491216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:12,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332290606] [2021-05-21 20:41:12,247 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:12,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:41:12,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:12,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:41:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:12,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332290606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:12,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:12,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2021-05-21 20:41:12,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356961669] [2021-05-21 20:41:12,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:41:12,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:12,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:41:12,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:12,431 INFO L87 Difference]: Start difference. First operand 12621 states and 83030 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:13,275 INFO L93 Difference]: Finished difference Result 40048 states and 255837 transitions. [2021-05-21 20:41:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:41:13,275 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 20:41:13,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:13,440 INFO L225 Difference]: With dead ends: 40048 [2021-05-21 20:41:13,440 INFO L226 Difference]: Without dead ends: 37299 [2021-05-21 20:41:13,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:41:13,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37299 states. [2021-05-21 20:41:14,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37299 to 23827. [2021-05-21 20:41:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23827 states, 23826 states have (on average 6.888734995383195) internal successors, (164131), 23826 states have internal predecessors, (164131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23827 states to 23827 states and 164131 transitions. [2021-05-21 20:41:14,346 INFO L78 Accepts]: Start accepts. Automaton has 23827 states and 164131 transitions. Word has length 31 [2021-05-21 20:41:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:14,346 INFO L482 AbstractCegarLoop]: Abstraction has 23827 states and 164131 transitions. [2021-05-21 20:41:14,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 23827 states and 164131 transitions. [2021-05-21 20:41:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:41:14,399 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:14,400 INFO L521 BasicCegarLoop]: trace histogram [3, 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] [2021-05-21 20:41:14,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 20:41:14,602 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:14,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:14,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1166394235, now seen corresponding path program 16 times [2021-05-21 20:41:14,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:14,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26259911] [2021-05-21 20:41:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:14,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:14,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26259911] [2021-05-21 20:41:14,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26259911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:14,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410904186] [2021-05-21 20:41:14,641 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:14,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:41:14,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:14,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:41:14,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:14,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410904186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:14,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:14,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 20:41:14,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483686325] [2021-05-21 20:41:14,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:41:14,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:14,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:41:14,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:14,795 INFO L87 Difference]: Start difference. First operand 23827 states and 164131 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:15,498 INFO L93 Difference]: Finished difference Result 37282 states and 244997 transitions. [2021-05-21 20:41:15,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:41:15,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:15,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:15,632 INFO L225 Difference]: With dead ends: 37282 [2021-05-21 20:41:15,632 INFO L226 Difference]: Without dead ends: 32432 [2021-05-21 20:41:15,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:15,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32432 states. [2021-05-21 20:41:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32432 to 23826. [2021-05-21 20:41:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23826 states, 23825 states have (on average 6.828247639034627) internal successors, (162683), 23825 states have internal predecessors, (162683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:16,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23826 states to 23826 states and 162683 transitions. [2021-05-21 20:41:16,625 INFO L78 Accepts]: Start accepts. Automaton has 23826 states and 162683 transitions. Word has length 32 [2021-05-21 20:41:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:16,625 INFO L482 AbstractCegarLoop]: Abstraction has 23826 states and 162683 transitions. [2021-05-21 20:41:16,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:16,625 INFO L276 IsEmpty]: Start isEmpty. Operand 23826 states and 162683 transitions. [2021-05-21 20:41:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:41:16,695 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:16,695 INFO L521 BasicCegarLoop]: trace histogram [3, 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] [2021-05-21 20:41:16,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:16,896 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:16,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:16,896 INFO L82 PathProgramCache]: Analyzing trace with hash 418167869, now seen corresponding path program 17 times [2021-05-21 20:41:16,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:16,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158254497] [2021-05-21 20:41:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:16,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:16,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158254497] [2021-05-21 20:41:16,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158254497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:16,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801642356] [2021-05-21 20:41:16,943 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:17,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:41:17,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:17,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:41:17,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:17,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801642356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:17,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:17,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:41:17,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527811567] [2021-05-21 20:41:17,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:41:17,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:41:17,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:41:17,116 INFO L87 Difference]: Start difference. First operand 23826 states and 162683 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2021-05-21 20:41:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:17,978 INFO L93 Difference]: Finished difference Result 41333 states and 268452 transitions. [2021-05-21 20:41:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:41:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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 [2021-05-21 20:41:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:18,177 INFO L225 Difference]: With dead ends: 41333 [2021-05-21 20:41:18,178 INFO L226 Difference]: Without dead ends: 28816 [2021-05-21 20:41:18,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:41:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28816 states. [2021-05-21 20:41:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28816 to 21142. [2021-05-21 20:41:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21142 states, 21141 states have (on average 6.765668606026205) internal successors, (143033), 21141 states have internal predecessors, (143033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21142 states to 21142 states and 143033 transitions. [2021-05-21 20:41:18,782 INFO L78 Accepts]: Start accepts. Automaton has 21142 states and 143033 transitions. Word has length 32 [2021-05-21 20:41:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:18,783 INFO L482 AbstractCegarLoop]: Abstraction has 21142 states and 143033 transitions. [2021-05-21 20:41:18,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2021-05-21 20:41:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 21142 states and 143033 transitions. [2021-05-21 20:41:18,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:41:18,835 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:18,836 INFO L521 BasicCegarLoop]: trace histogram [3, 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] [2021-05-21 20:41:19,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 20:41:19,036 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:19,037 INFO L82 PathProgramCache]: Analyzing trace with hash 791966179, now seen corresponding path program 18 times [2021-05-21 20:41:19,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:19,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024355011] [2021-05-21 20:41:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-21 20:41:19,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:19,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024355011] [2021-05-21 20:41:19,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024355011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:19,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280755419] [2021-05-21 20:41:19,070 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:19,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:41:19,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:19,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:41:19,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:19,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280755419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:19,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:19,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:41:19,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074586188] [2021-05-21 20:41:19,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:41:19,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:19,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:41:19,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:41:19,687 INFO L87 Difference]: Start difference. First operand 21142 states and 143033 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:20,175 INFO L93 Difference]: Finished difference Result 44813 states and 287398 transitions. [2021-05-21 20:41:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:41:20,176 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:20,302 INFO L225 Difference]: With dead ends: 44813 [2021-05-21 20:41:20,302 INFO L226 Difference]: Without dead ends: 33157 [2021-05-21 20:41:20,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:41:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33157 states. [2021-05-21 20:41:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33157 to 20660. [2021-05-21 20:41:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20660 states, 20659 states have (on average 6.63855946560821) internal successors, (137146), 20659 states have internal predecessors, (137146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20660 states to 20660 states and 137146 transitions. [2021-05-21 20:41:21,202 INFO L78 Accepts]: Start accepts. Automaton has 20660 states and 137146 transitions. Word has length 32 [2021-05-21 20:41:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:21,202 INFO L482 AbstractCegarLoop]: Abstraction has 20660 states and 137146 transitions. [2021-05-21 20:41:21,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 20660 states and 137146 transitions. [2021-05-21 20:41:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:41:21,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:21,251 INFO L521 BasicCegarLoop]: trace histogram [3, 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] [2021-05-21 20:41:21,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 20:41:21,453 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1084222905, now seen corresponding path program 19 times [2021-05-21 20:41:21,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:21,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813282519] [2021-05-21 20:41:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:21,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:21,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813282519] [2021-05-21 20:41:21,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813282519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:21,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21786528] [2021-05-21 20:41:21,485 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:21,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:41:21,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:21,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21786528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:21,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:21,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:41:21,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136962397] [2021-05-21 20:41:21,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:41:21,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:21,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:41:21,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:41:21,634 INFO L87 Difference]: Start difference. First operand 20660 states and 137146 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:22,364 INFO L93 Difference]: Finished difference Result 40132 states and 256712 transitions. [2021-05-21 20:41:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:41:22,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:22,505 INFO L225 Difference]: With dead ends: 40132 [2021-05-21 20:41:22,505 INFO L226 Difference]: Without dead ends: 29402 [2021-05-21 20:41:22,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:41:22,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29402 states. [2021-05-21 20:41:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29402 to 19318. [2021-05-21 20:41:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19318 states, 19317 states have (on average 6.575969353419268) internal successors, (127028), 19317 states have internal predecessors, (127028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19318 states to 19318 states and 127028 transitions. [2021-05-21 20:41:23,186 INFO L78 Accepts]: Start accepts. Automaton has 19318 states and 127028 transitions. Word has length 32 [2021-05-21 20:41:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:23,186 INFO L482 AbstractCegarLoop]: Abstraction has 19318 states and 127028 transitions. [2021-05-21 20:41:23,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 19318 states and 127028 transitions. [2021-05-21 20:41:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:41:23,237 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:23,237 INFO L521 BasicCegarLoop]: trace histogram [3, 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] [2021-05-21 20:41:23,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:23,438 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:23,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1022183291, now seen corresponding path program 20 times [2021-05-21 20:41:23,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:23,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325958402] [2021-05-21 20:41:23,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:23,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:23,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325958402] [2021-05-21 20:41:23,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325958402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:23,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609717883] [2021-05-21 20:41:23,478 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:23,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:41:23,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:41:23,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:23,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609717883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:23,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:23,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:41:23,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655887693] [2021-05-21 20:41:23,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:41:23,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:23,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:41:23,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:41:23,663 INFO L87 Difference]: Start difference. First operand 19318 states and 127028 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:24,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:24,465 INFO L93 Difference]: Finished difference Result 30263 states and 196279 transitions. [2021-05-21 20:41:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:41:24,465 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:24,581 INFO L225 Difference]: With dead ends: 30263 [2021-05-21 20:41:24,582 INFO L226 Difference]: Without dead ends: 27994 [2021-05-21 20:41:24,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:41:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27994 states. [2021-05-21 20:41:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27994 to 19318. [2021-05-21 20:41:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19318 states, 19317 states have (on average 6.575969353419268) internal successors, (127028), 19317 states have internal predecessors, (127028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19318 states to 19318 states and 127028 transitions. [2021-05-21 20:41:25,563 INFO L78 Accepts]: Start accepts. Automaton has 19318 states and 127028 transitions. Word has length 32 [2021-05-21 20:41:25,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:25,567 INFO L482 AbstractCegarLoop]: Abstraction has 19318 states and 127028 transitions. [2021-05-21 20:41:25,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:25,567 INFO L276 IsEmpty]: Start isEmpty. Operand 19318 states and 127028 transitions. [2021-05-21 20:41:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:41:25,626 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:25,626 INFO L521 BasicCegarLoop]: trace histogram [3, 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] [2021-05-21 20:41:25,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 20:41:25,827 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:25,827 INFO L82 PathProgramCache]: Analyzing trace with hash 13605117, now seen corresponding path program 21 times [2021-05-21 20:41:25,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:25,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615113351] [2021-05-21 20:41:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:25,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:25,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615113351] [2021-05-21 20:41:25,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615113351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:25,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255824806] [2021-05-21 20:41:25,868 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:25,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:41:25,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:25,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:41:25,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-21 20:41:26,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255824806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:26,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:26,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-21 20:41:26,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261569494] [2021-05-21 20:41:26,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:41:26,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:26,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:41:26,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:41:26,055 INFO L87 Difference]: Start difference. First operand 19318 states and 127028 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:27,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:27,137 INFO L93 Difference]: Finished difference Result 45485 states and 293122 transitions. [2021-05-21 20:41:27,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 20:41:27,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:27,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:27,668 INFO L225 Difference]: With dead ends: 45485 [2021-05-21 20:41:27,668 INFO L226 Difference]: Without dead ends: 40798 [2021-05-21 20:41:27,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 377.8ms TimeCoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:41:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40798 states. [2021-05-21 20:41:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40798 to 22218. [2021-05-21 20:41:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22218 states, 22217 states have (on average 6.736643111131116) internal successors, (149668), 22217 states have internal predecessors, (149668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22218 states to 22218 states and 149668 transitions. [2021-05-21 20:41:28,422 INFO L78 Accepts]: Start accepts. Automaton has 22218 states and 149668 transitions. Word has length 32 [2021-05-21 20:41:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:28,422 INFO L482 AbstractCegarLoop]: Abstraction has 22218 states and 149668 transitions. [2021-05-21 20:41:28,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:28,422 INFO L276 IsEmpty]: Start isEmpty. Operand 22218 states and 149668 transitions. [2021-05-21 20:41:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:41:28,479 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:28,479 INFO L521 BasicCegarLoop]: trace histogram [3, 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] [2021-05-21 20:41:28,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:28,680 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:28,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1536238151, now seen corresponding path program 22 times [2021-05-21 20:41:28,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:28,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008151400] [2021-05-21 20:41:28,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:28,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008151400] [2021-05-21 20:41:28,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008151400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326305754] [2021-05-21 20:41:28,721 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:28,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:41:28,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:28,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:41:28,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:29,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326305754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:29,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:29,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 20:41:29,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094351597] [2021-05-21 20:41:29,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:41:29,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:29,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:41:29,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:29,155 INFO L87 Difference]: Start difference. First operand 22218 states and 149668 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:29,661 INFO L93 Difference]: Finished difference Result 41987 states and 272492 transitions. [2021-05-21 20:41:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:41:29,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:29,798 INFO L225 Difference]: With dead ends: 41987 [2021-05-21 20:41:29,798 INFO L226 Difference]: Without dead ends: 33040 [2021-05-21 20:41:29,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:41:29,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33040 states. [2021-05-21 20:41:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33040 to 22218. [2021-05-21 20:41:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22218 states, 22217 states have (on average 6.7117972723590045) internal successors, (149116), 22217 states have internal predecessors, (149116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22218 states to 22218 states and 149116 transitions. [2021-05-21 20:41:30,792 INFO L78 Accepts]: Start accepts. Automaton has 22218 states and 149116 transitions. Word has length 32 [2021-05-21 20:41:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:30,792 INFO L482 AbstractCegarLoop]: Abstraction has 22218 states and 149116 transitions. [2021-05-21 20:41:30,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 22218 states and 149116 transitions. [2021-05-21 20:41:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:41:30,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:30,847 INFO L521 BasicCegarLoop]: trace histogram [3, 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] [2021-05-21 20:41:31,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 20:41:31,048 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash -339950933, now seen corresponding path program 23 times [2021-05-21 20:41:31,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:31,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247986216] [2021-05-21 20:41:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:31,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:31,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247986216] [2021-05-21 20:41:31,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247986216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:31,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957714859] [2021-05-21 20:41:31,081 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:31,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:41:31,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:41:31,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:31,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957714859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:31,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:31,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 20:41:31,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464722657] [2021-05-21 20:41:31,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:41:31,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:31,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:41:31,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:31,228 INFO L87 Difference]: Start difference. First operand 22218 states and 149116 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:31,604 INFO L93 Difference]: Finished difference Result 37137 states and 242038 transitions. [2021-05-21 20:41:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:41:31,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:31,735 INFO L225 Difference]: With dead ends: 37137 [2021-05-21 20:41:31,735 INFO L226 Difference]: Without dead ends: 33280 [2021-05-21 20:41:31,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33280 states. [2021-05-21 20:41:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33280 to 21666. [2021-05-21 20:41:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21666 states, 21665 states have (on average 6.638495268866836) internal successors, (143823), 21665 states have internal predecessors, (143823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21666 states to 21666 states and 143823 transitions. [2021-05-21 20:41:32,655 INFO L78 Accepts]: Start accepts. Automaton has 21666 states and 143823 transitions. Word has length 32 [2021-05-21 20:41:32,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:32,655 INFO L482 AbstractCegarLoop]: Abstraction has 21666 states and 143823 transitions. [2021-05-21 20:41:32,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:32,655 INFO L276 IsEmpty]: Start isEmpty. Operand 21666 states and 143823 transitions. [2021-05-21 20:41:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:41:32,707 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:32,707 INFO L521 BasicCegarLoop]: trace histogram [3, 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] [2021-05-21 20:41:32,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 20:41:32,909 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:32,909 INFO L82 PathProgramCache]: Analyzing trace with hash -277911319, now seen corresponding path program 24 times [2021-05-21 20:41:32,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:32,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061949521] [2021-05-21 20:41:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-21 20:41:32,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:32,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061949521] [2021-05-21 20:41:32,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061949521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:32,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76048358] [2021-05-21 20:41:32,943 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:33,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:41:33,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:33,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:41:33,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:33,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76048358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:33,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:33,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:41:33,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113565481] [2021-05-21 20:41:33,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:41:33,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:33,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:41:33,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:41:33,110 INFO L87 Difference]: Start difference. First operand 21666 states and 143823 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:34,173 INFO L93 Difference]: Finished difference Result 55554 states and 358578 transitions. [2021-05-21 20:41:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:41:34,181 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:34,356 INFO L225 Difference]: With dead ends: 55554 [2021-05-21 20:41:34,357 INFO L226 Difference]: Without dead ends: 31050 [2021-05-21 20:41:34,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:41:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31050 states. [2021-05-21 20:41:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31050 to 18354. [2021-05-21 20:41:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18354 states, 18353 states have (on average 6.557238598594235) internal successors, (120345), 18353 states have internal predecessors, (120345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18354 states to 18354 states and 120345 transitions. [2021-05-21 20:41:35,472 INFO L78 Accepts]: Start accepts. Automaton has 18354 states and 120345 transitions. Word has length 32 [2021-05-21 20:41:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:35,472 INFO L482 AbstractCegarLoop]: Abstraction has 18354 states and 120345 transitions. [2021-05-21 20:41:35,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 18354 states and 120345 transitions. [2021-05-21 20:41:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:41:35,572 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:35,572 INFO L521 BasicCegarLoop]: trace histogram [3, 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] [2021-05-21 20:41:35,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:35,789 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:35,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1583277101, now seen corresponding path program 25 times [2021-05-21 20:41:35,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:35,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679363272] [2021-05-21 20:41:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:35,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679363272] [2021-05-21 20:41:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679363272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556762571] [2021-05-21 20:41:35,841 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:35,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:41:35,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:35,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556762571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:35,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:35,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:41:35,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219167036] [2021-05-21 20:41:35,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:41:35,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:41:35,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:41:35,989 INFO L87 Difference]: Start difference. First operand 18354 states and 120345 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:36,413 INFO L93 Difference]: Finished difference Result 24315 states and 158900 transitions. [2021-05-21 20:41:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:41:36,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:36,502 INFO L225 Difference]: With dead ends: 24315 [2021-05-21 20:41:36,503 INFO L226 Difference]: Without dead ends: 21666 [2021-05-21 20:41:36,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:41:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21666 states. [2021-05-21 20:41:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21666 to 19458. [2021-05-21 20:41:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19458 states, 19457 states have (on average 6.559027599321581) internal successors, (127619), 19457 states have internal predecessors, (127619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:37,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19458 states to 19458 states and 127619 transitions. [2021-05-21 20:41:37,431 INFO L78 Accepts]: Start accepts. Automaton has 19458 states and 127619 transitions. Word has length 32 [2021-05-21 20:41:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:37,431 INFO L482 AbstractCegarLoop]: Abstraction has 19458 states and 127619 transitions. [2021-05-21 20:41:37,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 19458 states and 127619 transitions. [2021-05-21 20:41:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:37,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:37,498 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] [2021-05-21 20:41:37,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:37,713 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:37,713 INFO L82 PathProgramCache]: Analyzing trace with hash 548184980, now seen corresponding path program 26 times [2021-05-21 20:41:37,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:37,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774986185] [2021-05-21 20:41:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:37,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:37,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774986185] [2021-05-21 20:41:37,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774986185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:37,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099493175] [2021-05-21 20:41:37,759 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:37,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:41:37,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:37,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:41:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:41:37,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099493175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:37,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:37,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-05-21 20:41:37,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220846480] [2021-05-21 20:41:37,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:41:37,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:37,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:41:37,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:41:37,945 INFO L87 Difference]: Start difference. First operand 19458 states and 127619 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:38,377 INFO L93 Difference]: Finished difference Result 43790 states and 285373 transitions. [2021-05-21 20:41:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:41:38,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:38,559 INFO L225 Difference]: With dead ends: 43790 [2021-05-21 20:41:38,559 INFO L226 Difference]: Without dead ends: 42141 [2021-05-21 20:41:38,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:41:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42141 states. [2021-05-21 20:41:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42141 to 31980. [2021-05-21 20:41:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31980 states, 31979 states have (on average 6.798211326182807) internal successors, (217400), 31979 states have internal predecessors, (217400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31980 states to 31980 states and 217400 transitions. [2021-05-21 20:41:39,741 INFO L78 Accepts]: Start accepts. Automaton has 31980 states and 217400 transitions. Word has length 33 [2021-05-21 20:41:39,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:39,741 INFO L482 AbstractCegarLoop]: Abstraction has 31980 states and 217400 transitions. [2021-05-21 20:41:39,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 31980 states and 217400 transitions. [2021-05-21 20:41:39,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:39,824 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:39,824 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] [2021-05-21 20:41:40,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-21 20:41:40,024 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:40,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:40,025 INFO L82 PathProgramCache]: Analyzing trace with hash 692395924, now seen corresponding path program 27 times [2021-05-21 20:41:40,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:40,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867228803] [2021-05-21 20:41:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-21 20:41:40,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:40,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867228803] [2021-05-21 20:41:40,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867228803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:40,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413225398] [2021-05-21 20:41:40,069 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:40,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:41:40,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:40,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:41:40,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-05-21 20:41:40,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413225398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:40,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:40,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-05-21 20:41:40,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081282795] [2021-05-21 20:41:40,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:41:40,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:40,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:41:40,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:41:40,224 INFO L87 Difference]: Start difference. First operand 31980 states and 217400 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:41,779 INFO L93 Difference]: Finished difference Result 78327 states and 512684 transitions. [2021-05-21 20:41:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:41:41,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:42,105 INFO L225 Difference]: With dead ends: 78327 [2021-05-21 20:41:42,105 INFO L226 Difference]: Without dead ends: 73049 [2021-05-21 20:41:42,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:41:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73049 states. [2021-05-21 20:41:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73049 to 37920. [2021-05-21 20:41:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37920 states, 37919 states have (on average 6.966454811572035) internal successors, (264161), 37919 states have internal predecessors, (264161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37920 states to 37920 states and 264161 transitions. [2021-05-21 20:41:44,386 INFO L78 Accepts]: Start accepts. Automaton has 37920 states and 264161 transitions. Word has length 33 [2021-05-21 20:41:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:44,386 INFO L482 AbstractCegarLoop]: Abstraction has 37920 states and 264161 transitions. [2021-05-21 20:41:44,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 37920 states and 264161 transitions. [2021-05-21 20:41:44,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:44,488 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:44,488 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] [2021-05-21 20:41:44,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:44,689 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:44,689 INFO L82 PathProgramCache]: Analyzing trace with hash -694764650, now seen corresponding path program 28 times [2021-05-21 20:41:44,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:44,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475745495] [2021-05-21 20:41:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-21 20:41:44,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:44,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475745495] [2021-05-21 20:41:44,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475745495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:44,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386665310] [2021-05-21 20:41:44,731 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:44,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:41:44,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:44,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:41:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:41:44,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386665310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:44,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:44,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-21 20:41:44,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181827945] [2021-05-21 20:41:44,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:41:44,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:44,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:41:44,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:41:44,834 INFO L87 Difference]: Start difference. First operand 37920 states and 264161 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:46,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:46,299 INFO L93 Difference]: Finished difference Result 100012 states and 667139 transitions. [2021-05-21 20:41:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:41:46,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:46,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:46,768 INFO L225 Difference]: With dead ends: 100012 [2021-05-21 20:41:46,768 INFO L226 Difference]: Without dead ends: 92787 [2021-05-21 20:41:46,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:41:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92787 states. [2021-05-21 20:41:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92787 to 58925. [2021-05-21 20:41:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58925 states, 58924 states have (on average 7.206706944538728) internal successors, (424648), 58924 states have internal predecessors, (424648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58925 states to 58925 states and 424648 transitions. [2021-05-21 20:41:49,661 INFO L78 Accepts]: Start accepts. Automaton has 58925 states and 424648 transitions. Word has length 33 [2021-05-21 20:41:49,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:49,661 INFO L482 AbstractCegarLoop]: Abstraction has 58925 states and 424648 transitions. [2021-05-21 20:41:49,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 58925 states and 424648 transitions. [2021-05-21 20:41:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 20:41:49,857 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:49,857 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-21 20:41:50,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-21 20:41:50,058 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:50,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1092657503, now seen corresponding path program 29 times [2021-05-21 20:41:50,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:50,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201066481] [2021-05-21 20:41:50,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:41:50,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:50,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201066481] [2021-05-21 20:41:50,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201066481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:50,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346714162] [2021-05-21 20:41:50,086 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:50,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:41:50,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:50,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:41:50,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:41:50,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346714162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:50,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:50,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:41:50,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628383371] [2021-05-21 20:41:50,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:41:50,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:50,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:41:50,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:50,205 INFO L87 Difference]: Start difference. First operand 58925 states and 424648 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:51,478 INFO L93 Difference]: Finished difference Result 86764 states and 598397 transitions. [2021-05-21 20:41:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:41:51,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 34 [2021-05-21 20:41:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:51,870 INFO L225 Difference]: With dead ends: 86764 [2021-05-21 20:41:51,870 INFO L226 Difference]: Without dead ends: 74248 [2021-05-21 20:41:51,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74248 states. [2021-05-21 20:41:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74248 to 55757. [2021-05-21 20:41:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55757 states, 55756 states have (on average 7.122354544802353) internal successors, (397114), 55756 states have internal predecessors, (397114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55757 states to 55757 states and 397114 transitions. [2021-05-21 20:41:54,613 INFO L78 Accepts]: Start accepts. Automaton has 55757 states and 397114 transitions. Word has length 34 [2021-05-21 20:41:54,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:54,613 INFO L482 AbstractCegarLoop]: Abstraction has 55757 states and 397114 transitions. [2021-05-21 20:41:54,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 55757 states and 397114 transitions. [2021-05-21 20:41:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 20:41:54,788 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:54,788 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-21 20:41:54,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 20:41:54,988 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:41:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:54,989 INFO L82 PathProgramCache]: Analyzing trace with hash 759094517, now seen corresponding path program 30 times [2021-05-21 20:41:54,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:54,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829081691] [2021-05-21 20:41:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:41:55,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:55,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829081691] [2021-05-21 20:41:55,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829081691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:55,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076173002] [2021-05-21 20:41:55,025 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:55,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:41:55,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:41:55,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:41:55,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076173002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:55,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:55,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:41:55,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892467313] [2021-05-21 20:41:55,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:41:55,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:55,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:41:55,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:41:55,151 INFO L87 Difference]: Start difference. First operand 55757 states and 397114 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:56,720 INFO L93 Difference]: Finished difference Result 92909 states and 637114 transitions. [2021-05-21 20:41:56,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:41:56,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:41:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:57,114 INFO L225 Difference]: With dead ends: 92909 [2021-05-21 20:41:57,114 INFO L226 Difference]: Without dead ends: 68099 [2021-05-21 20:41:57,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:41:57,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68099 states. [2021-05-21 20:41:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68099 to 55757. [2021-05-21 20:41:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55757 states, 55756 states have (on average 7.012267738001292) internal successors, (390976), 55756 states have internal predecessors, (390976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55757 states to 55757 states and 390976 transitions. [2021-05-21 20:41:59,175 INFO L78 Accepts]: Start accepts. Automaton has 55757 states and 390976 transitions. Word has length 34 [2021-05-21 20:41:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:59,176 INFO L482 AbstractCegarLoop]: Abstraction has 55757 states and 390976 transitions. [2021-05-21 20:41:59,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 55757 states and 390976 transitions. [2021-05-21 20:41:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 20:41:59,960 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:59,960 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-21 20:42:00,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 20:42:00,183 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:42:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:00,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1460159095, now seen corresponding path program 31 times [2021-05-21 20:42:00,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:00,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037465313] [2021-05-21 20:42:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:42:00,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:00,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037465313] [2021-05-21 20:42:00,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037465313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:00,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130291786] [2021-05-21 20:42:00,210 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:42:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:42:00,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130291786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:00,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:00,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:42:00,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321759191] [2021-05-21 20:42:00,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:42:00,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:00,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:42:00,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:42:00,324 INFO L87 Difference]: Start difference. First operand 55757 states and 390976 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:42:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:01,026 INFO L93 Difference]: Finished difference Result 86696 states and 588891 transitions. [2021-05-21 20:42:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:42:01,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 34 [2021-05-21 20:42:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:02,031 INFO L225 Difference]: With dead ends: 86696 [2021-05-21 20:42:02,031 INFO L226 Difference]: Without dead ends: 71102 [2021-05-21 20:42:02,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:42:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71102 states. [2021-05-21 20:42:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71102 to 49619. [2021-05-21 20:42:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49619 states, 49618 states have (on average 6.850961344673304) internal successors, (339931), 49618 states have internal predecessors, (339931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49619 states to 49619 states and 339931 transitions. [2021-05-21 20:42:04,019 INFO L78 Accepts]: Start accepts. Automaton has 49619 states and 339931 transitions. Word has length 34 [2021-05-21 20:42:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:04,019 INFO L482 AbstractCegarLoop]: Abstraction has 49619 states and 339931 transitions. [2021-05-21 20:42:04,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:42:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 49619 states and 339931 transitions. [2021-05-21 20:42:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 20:42:04,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:04,175 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-21 20:42:04,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 20:42:04,375 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:42:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:04,376 INFO L82 PathProgramCache]: Analyzing trace with hash -351716319, now seen corresponding path program 32 times [2021-05-21 20:42:04,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:04,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114458689] [2021-05-21 20:42:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:42:04,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:04,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114458689] [2021-05-21 20:42:04,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114458689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:04,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574321185] [2021-05-21 20:42:04,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:04,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:42:04,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:04,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:42:04,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:42:04,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574321185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:04,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:04,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:42:04,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811152608] [2021-05-21 20:42:04,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:42:04,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:04,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:42:04,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:42:04,528 INFO L87 Difference]: Start difference. First operand 49619 states and 339931 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:42:05,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:05,836 INFO L93 Difference]: Finished difference Result 74312 states and 504788 transitions. [2021-05-21 20:42:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:42:05,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 34 [2021-05-21 20:42:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:06,144 INFO L225 Difference]: With dead ends: 74312 [2021-05-21 20:42:06,144 INFO L226 Difference]: Without dead ends: 61961 [2021-05-21 20:42:06,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:42:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61961 states. [2021-05-21 20:42:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61961 to 46550. [2021-05-21 20:42:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46550 states, 46549 states have (on average 6.78732088766676) internal successors, (315943), 46549 states have internal predecessors, (315943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46550 states to 46550 states and 315943 transitions. [2021-05-21 20:42:07,857 INFO L78 Accepts]: Start accepts. Automaton has 46550 states and 315943 transitions. Word has length 34 [2021-05-21 20:42:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:07,857 INFO L482 AbstractCegarLoop]: Abstraction has 46550 states and 315943 transitions. [2021-05-21 20:42:07,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-05-21 20:42:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 46550 states and 315943 transitions. [2021-05-21 20:42:07,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 20:42:07,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:07,986 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-21 20:42:08,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 20:42:08,188 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:42:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash -744743329, now seen corresponding path program 33 times [2021-05-21 20:42:08,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:08,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318662805] [2021-05-21 20:42:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:42:08,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:08,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318662805] [2021-05-21 20:42:08,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318662805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:08,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924542520] [2021-05-21 20:42:08,228 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:08,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:42:08,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:08,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:42:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:42:08,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924542520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:08,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:08,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:42:08,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617207169] [2021-05-21 20:42:08,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:42:08,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:42:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:42:08,349 INFO L87 Difference]: Start difference. First operand 46550 states and 315943 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:09,602 INFO L93 Difference]: Finished difference Result 65072 states and 441884 transitions. [2021-05-21 20:42:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:42:09,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:42:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:09,883 INFO L225 Difference]: With dead ends: 65072 [2021-05-21 20:42:09,883 INFO L226 Difference]: Without dead ends: 58826 [2021-05-21 20:42:09,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:42:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58826 states. [2021-05-21 20:42:11,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58826 to 52688. [2021-05-21 20:42:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52688 states, 52687 states have (on average 6.79068840510942) internal successors, (357781), 52687 states have internal predecessors, (357781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52688 states to 52688 states and 357781 transitions. [2021-05-21 20:42:12,177 INFO L78 Accepts]: Start accepts. Automaton has 52688 states and 357781 transitions. Word has length 34 [2021-05-21 20:42:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:12,177 INFO L482 AbstractCegarLoop]: Abstraction has 52688 states and 357781 transitions. [2021-05-21 20:42:12,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 52688 states and 357781 transitions. [2021-05-21 20:42:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:42:12,954 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:12,954 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:13,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 20:42:13,154 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:42:13,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:13,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1952484644, now seen corresponding path program 34 times [2021-05-21 20:42:13,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:13,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584246829] [2021-05-21 20:42:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-21 20:42:13,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:13,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584246829] [2021-05-21 20:42:13,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584246829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:13,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815620754] [2021-05-21 20:42:13,202 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:13,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:42:13,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:13,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:42:13,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:42:13,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815620754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:13,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:13,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-05-21 20:42:13,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277820155] [2021-05-21 20:42:13,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:42:13,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:13,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:42:13,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:42:13,358 INFO L87 Difference]: Start difference. First operand 52688 states and 357781 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:15,770 INFO L93 Difference]: Finished difference Result 164151 states and 1080949 transitions. [2021-05-21 20:42:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:42:15,771 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 20:42:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:16,557 INFO L225 Difference]: With dead ends: 164151 [2021-05-21 20:42:16,558 INFO L226 Difference]: Without dead ends: 155058 [2021-05-21 20:42:16,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:42:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155058 states. [2021-05-21 20:42:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155058 to 98860. [2021-05-21 20:42:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98860 states, 98859 states have (on average 7.100709090725174) internal successors, (701969), 98859 states have internal predecessors, (701969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98860 states to 98860 states and 701969 transitions. [2021-05-21 20:42:21,492 INFO L78 Accepts]: Start accepts. Automaton has 98860 states and 701969 transitions. Word has length 35 [2021-05-21 20:42:21,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:21,493 INFO L482 AbstractCegarLoop]: Abstraction has 98860 states and 701969 transitions. [2021-05-21 20:42:21,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:21,493 INFO L276 IsEmpty]: Start isEmpty. Operand 98860 states and 701969 transitions. [2021-05-21 20:42:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 20:42:22,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:22,620 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-05-21 20:42:22,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 20:42:22,843 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:42:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:22,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1072335793, now seen corresponding path program 35 times [2021-05-21 20:42:22,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:22,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521465545] [2021-05-21 20:42:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-21 20:42:22,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:22,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521465545] [2021-05-21 20:42:22,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521465545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:22,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170042424] [2021-05-21 20:42:22,883 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:22,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:42:22,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:22,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:42:22,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-21 20:42:23,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170042424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:23,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:23,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-05-21 20:42:23,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750106064] [2021-05-21 20:42:23,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:42:23,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:23,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:42:23,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:42:23,051 INFO L87 Difference]: Start difference. First operand 98860 states and 701969 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:24,909 INFO L93 Difference]: Finished difference Result 144978 states and 989665 transitions. [2021-05-21 20:42:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:42:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:42:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:25,594 INFO L225 Difference]: With dead ends: 144978 [2021-05-21 20:42:25,594 INFO L226 Difference]: Without dead ends: 131912 [2021-05-21 20:42:25,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:42:25,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131912 states. [2021-05-21 20:42:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131912 to 102815. [2021-05-21 20:42:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102815 states, 102814 states have (on average 7.039090007197464) internal successors, (723717), 102814 states have internal predecessors, (723717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102815 states to 102815 states and 723717 transitions. [2021-05-21 20:42:30,399 INFO L78 Accepts]: Start accepts. Automaton has 102815 states and 723717 transitions. Word has length 36 [2021-05-21 20:42:30,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:30,399 INFO L482 AbstractCegarLoop]: Abstraction has 102815 states and 723717 transitions. [2021-05-21 20:42:30,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 102815 states and 723717 transitions. [2021-05-21 20:42:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 20:42:30,773 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:30,774 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-05-21 20:42:30,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:30,974 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:42:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash 776425721, now seen corresponding path program 36 times [2021-05-21 20:42:30,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:30,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071502917] [2021-05-21 20:42:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-21 20:42:31,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:31,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071502917] [2021-05-21 20:42:31,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071502917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:31,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029213546] [2021-05-21 20:42:31,027 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:31,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:42:31,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:31,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:42:31,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-21 20:42:31,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029213546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:31,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:31,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-21 20:42:31,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073917857] [2021-05-21 20:42:31,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:42:31,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:31,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:42:31,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:42:31,225 INFO L87 Difference]: Start difference. First operand 102815 states and 723717 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:34,080 INFO L93 Difference]: Finished difference Result 163299 states and 1102914 transitions. [2021-05-21 20:42:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:42:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:42:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:34,832 INFO L225 Difference]: With dead ends: 163299 [2021-05-21 20:42:34,832 INFO L226 Difference]: Without dead ends: 120510 [2021-05-21 20:42:34,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:42:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120510 states. [2021-05-21 20:42:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120510 to 87490. [2021-05-21 20:42:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87490 states, 87489 states have (on average 7.016344911931785) internal successors, (613853), 87489 states have internal predecessors, (613853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87490 states to 87490 states and 613853 transitions. [2021-05-21 20:42:38,783 INFO L78 Accepts]: Start accepts. Automaton has 87490 states and 613853 transitions. Word has length 36 [2021-05-21 20:42:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:38,783 INFO L482 AbstractCegarLoop]: Abstraction has 87490 states and 613853 transitions. [2021-05-21 20:42:38,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 87490 states and 613853 transitions. [2021-05-21 20:42:39,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 20:42:39,067 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:39,067 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-05-21 20:42:39,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:39,268 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:42:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:39,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2001694799, now seen corresponding path program 37 times [2021-05-21 20:42:39,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:39,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916882770] [2021-05-21 20:42:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-21 20:42:39,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:39,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916882770] [2021-05-21 20:42:39,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916882770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:39,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565079148] [2021-05-21 20:42:39,310 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:39,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:42:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:40,256 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-21 20:42:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-21 20:42:40,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565079148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:40,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:40,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-05-21 20:42:40,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777776894] [2021-05-21 20:42:40,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:42:40,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:40,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:42:40,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:42:40,349 INFO L87 Difference]: Start difference. First operand 87490 states and 613853 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:42,329 INFO L93 Difference]: Finished difference Result 148260 states and 994640 transitions. [2021-05-21 20:42:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:42:42,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:42:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:42,945 INFO L225 Difference]: With dead ends: 148260 [2021-05-21 20:42:42,946 INFO L226 Difference]: Without dead ends: 119736 [2021-05-21 20:42:42,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:42:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119736 states. [2021-05-21 20:42:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119736 to 88381. [2021-05-21 20:42:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88381 states, 88380 states have (on average 6.939499886852229) internal successors, (613313), 88380 states have internal predecessors, (613313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88381 states to 88381 states and 613313 transitions. [2021-05-21 20:42:46,604 INFO L78 Accepts]: Start accepts. Automaton has 88381 states and 613313 transitions. Word has length 36 [2021-05-21 20:42:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:46,604 INFO L482 AbstractCegarLoop]: Abstraction has 88381 states and 613313 transitions. [2021-05-21 20:42:46,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:46,604 INFO L276 IsEmpty]: Start isEmpty. Operand 88381 states and 613313 transitions. [2021-05-21 20:42:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 20:42:47,730 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:47,730 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-05-21 20:42:47,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:47,937 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:42:47,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1133140203, now seen corresponding path program 38 times [2021-05-21 20:42:47,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:47,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828460267] [2021-05-21 20:42:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-21 20:42:47,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:47,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828460267] [2021-05-21 20:42:47,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828460267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:47,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871790718] [2021-05-21 20:42:47,976 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:48,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:42:48,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:42:48,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-21 20:42:48,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871790718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:48,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:48,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-05-21 20:42:48,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965195014] [2021-05-21 20:42:48,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:42:48,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:48,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:42:48,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:42:48,156 INFO L87 Difference]: Start difference. First operand 88381 states and 613313 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:50,323 INFO L93 Difference]: Finished difference Result 154610 states and 1027932 transitions. [2021-05-21 20:42:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:42:50,324 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:42:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:50,937 INFO L225 Difference]: With dead ends: 154610 [2021-05-21 20:42:50,937 INFO L226 Difference]: Without dead ends: 121821 [2021-05-21 20:42:50,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:42:51,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121821 states. [2021-05-21 20:42:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121821 to 88381. [2021-05-21 20:42:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88381 states, 88380 states have (on average 6.9149015614392395) internal successors, (611139), 88380 states have internal predecessors, (611139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88381 states to 88381 states and 611139 transitions. [2021-05-21 20:42:55,381 INFO L78 Accepts]: Start accepts. Automaton has 88381 states and 611139 transitions. Word has length 36 [2021-05-21 20:42:55,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:55,382 INFO L482 AbstractCegarLoop]: Abstraction has 88381 states and 611139 transitions. [2021-05-21 20:42:55,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:55,382 INFO L276 IsEmpty]: Start isEmpty. Operand 88381 states and 611139 transitions. [2021-05-21 20:42:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 20:42:55,759 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:55,759 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-05-21 20:42:55,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-21 20:42:55,959 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:42:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:55,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1642613293, now seen corresponding path program 39 times [2021-05-21 20:42:55,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:55,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549761920] [2021-05-21 20:42:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-21 20:42:56,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:56,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549761920] [2021-05-21 20:42:56,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549761920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:56,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402387479] [2021-05-21 20:42:56,008 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:56,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:42:56,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:56,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:42:56,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-21 20:42:56,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402387479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:56,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:56,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-05-21 20:42:56,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433266985] [2021-05-21 20:42:56,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:42:56,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:56,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:42:56,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:42:56,193 INFO L87 Difference]: Start difference. First operand 88381 states and 611139 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:00,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:00,059 INFO L93 Difference]: Finished difference Result 188739 states and 1249534 transitions. [2021-05-21 20:43:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 20:43:00,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:43:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:00,979 INFO L225 Difference]: With dead ends: 188739 [2021-05-21 20:43:00,979 INFO L226 Difference]: Without dead ends: 177820 [2021-05-21 20:43:00,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=250, Invalid=2300, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:43:01,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177820 states. [2021-05-21 20:43:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177820 to 108631. [2021-05-21 20:43:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108631 states, 108630 states have (on average 6.994228113780723) internal successors, (759783), 108630 states have internal predecessors, (759783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108631 states to 108631 states and 759783 transitions. [2021-05-21 20:43:07,786 INFO L78 Accepts]: Start accepts. Automaton has 108631 states and 759783 transitions. Word has length 36 [2021-05-21 20:43:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:07,786 INFO L482 AbstractCegarLoop]: Abstraction has 108631 states and 759783 transitions. [2021-05-21 20:43:07,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 108631 states and 759783 transitions. [2021-05-21 20:43:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 20:43:08,888 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:08,888 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:09,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:09,101 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:43:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:09,102 INFO L82 PathProgramCache]: Analyzing trace with hash -674266402, now seen corresponding path program 40 times [2021-05-21 20:43:09,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:09,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931501242] [2021-05-21 20:43:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-21 20:43:09,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:09,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931501242] [2021-05-21 20:43:09,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931501242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:09,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938864516] [2021-05-21 20:43:09,140 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:09,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:09,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:09,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:09,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:43:09,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938864516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:09,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:09,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-05-21 20:43:09,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661710902] [2021-05-21 20:43:09,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:43:09,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:09,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:43:09,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:43:09,355 INFO L87 Difference]: Start difference. First operand 108631 states and 759783 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:11,887 INFO L93 Difference]: Finished difference Result 223476 states and 1495121 transitions. [2021-05-21 20:43:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:43:11,887 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 20:43:11,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:13,518 INFO L225 Difference]: With dead ends: 223476 [2021-05-21 20:43:13,518 INFO L226 Difference]: Without dead ends: 177390 [2021-05-21 20:43:13,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:43:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177390 states. [2021-05-21 20:43:17,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177390 to 106167. [2021-05-21 20:43:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106167 states, 106166 states have (on average 6.964772149275663) internal successors, (739422), 106166 states have internal predecessors, (739422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106167 states to 106167 states and 739422 transitions. [2021-05-21 20:43:19,017 INFO L78 Accepts]: Start accepts. Automaton has 106167 states and 739422 transitions. Word has length 37 [2021-05-21 20:43:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:19,017 INFO L482 AbstractCegarLoop]: Abstraction has 106167 states and 739422 transitions. [2021-05-21 20:43:19,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 106167 states and 739422 transitions. [2021-05-21 20:43:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 20:43:19,370 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:19,370 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:19,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:19,570 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:43:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:19,571 INFO L82 PathProgramCache]: Analyzing trace with hash 481122298, now seen corresponding path program 41 times [2021-05-21 20:43:19,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:19,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831994749] [2021-05-21 20:43:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:43:19,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:19,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831994749] [2021-05-21 20:43:19,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831994749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:19,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915795388] [2021-05-21 20:43:19,610 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:19,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:43:19,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:19,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:19,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:43:19,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915795388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:19,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:19,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-05-21 20:43:19,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597735846] [2021-05-21 20:43:19,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:43:19,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:19,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:43:19,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:43:19,844 INFO L87 Difference]: Start difference. First operand 106167 states and 739422 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:22,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:22,676 INFO L93 Difference]: Finished difference Result 191961 states and 1284744 transitions. [2021-05-21 20:43:22,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:43:22,677 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 20:43:22,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:23,596 INFO L225 Difference]: With dead ends: 191961 [2021-05-21 20:43:23,596 INFO L226 Difference]: Without dead ends: 159123 [2021-05-21 20:43:23,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159123 states. [2021-05-21 20:43:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159123 to 108827. [2021-05-21 20:43:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108827 states, 108826 states have (on average 6.872089390403029) internal successors, (747862), 108826 states have internal predecessors, (747862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108827 states to 108827 states and 747862 transitions. [2021-05-21 20:43:28,526 INFO L78 Accepts]: Start accepts. Automaton has 108827 states and 747862 transitions. Word has length 37 [2021-05-21 20:43:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:28,526 INFO L482 AbstractCegarLoop]: Abstraction has 108827 states and 747862 transitions. [2021-05-21 20:43:28,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 108827 states and 747862 transitions. [2021-05-21 20:43:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 20:43:28,872 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:28,872 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:29,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 20:43:29,077 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:43:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1867325692, now seen corresponding path program 42 times [2021-05-21 20:43:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:29,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555590497] [2021-05-21 20:43:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-21 20:43:29,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:29,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555590497] [2021-05-21 20:43:29,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555590497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:29,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692426849] [2021-05-21 20:43:29,116 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:29,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:43:29,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:29,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-21 20:43:29,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692426849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:29,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:29,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-21 20:43:29,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876590000] [2021-05-21 20:43:29,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:43:29,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:43:29,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:43:29,932 INFO L87 Difference]: Start difference. First operand 108827 states and 747862 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:32,793 INFO L93 Difference]: Finished difference Result 190091 states and 1240020 transitions. [2021-05-21 20:43:32,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 20:43:32,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 20:43:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:34,162 INFO L225 Difference]: With dead ends: 190091 [2021-05-21 20:43:34,162 INFO L226 Difference]: Without dead ends: 137534 [2021-05-21 20:43:34,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 540.2ms TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 20:43:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137534 states. [2021-05-21 20:43:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137534 to 99038. [2021-05-21 20:43:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99038 states, 99037 states have (on average 6.792249361349799) internal successors, (672684), 99037 states have internal predecessors, (672684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99038 states to 99038 states and 672684 transitions. [2021-05-21 20:43:38,543 INFO L78 Accepts]: Start accepts. Automaton has 99038 states and 672684 transitions. Word has length 37 [2021-05-21 20:43:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:38,543 INFO L482 AbstractCegarLoop]: Abstraction has 99038 states and 672684 transitions. [2021-05-21 20:43:38,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 99038 states and 672684 transitions. [2021-05-21 20:43:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 20:43:39,722 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:39,722 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:39,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-21 20:43:39,927 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:43:39,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:39,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1878928166, now seen corresponding path program 43 times [2021-05-21 20:43:39,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:39,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019364035] [2021-05-21 20:43:39,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:43:39,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:39,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019364035] [2021-05-21 20:43:39,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019364035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:39,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532701451] [2021-05-21 20:43:39,980 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:40,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:40,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:43:40,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532701451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:40,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:40,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:43:40,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101344633] [2021-05-21 20:43:40,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:43:40,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:40,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:43:40,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:40,197 INFO L87 Difference]: Start difference. First operand 99038 states and 672684 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:42,197 INFO L93 Difference]: Finished difference Result 147129 states and 986771 transitions. [2021-05-21 20:43:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:43:42,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 20:43:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:42,951 INFO L225 Difference]: With dead ends: 147129 [2021-05-21 20:43:42,951 INFO L226 Difference]: Without dead ends: 140734 [2021-05-21 20:43:42,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:43:43,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140734 states. [2021-05-21 20:43:46,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140734 to 99038. [2021-05-21 20:43:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99038 states, 99037 states have (on average 6.792249361349799) internal successors, (672684), 99037 states have internal predecessors, (672684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99038 states to 99038 states and 672684 transitions. [2021-05-21 20:43:47,848 INFO L78 Accepts]: Start accepts. Automaton has 99038 states and 672684 transitions. Word has length 37 [2021-05-21 20:43:47,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:47,849 INFO L482 AbstractCegarLoop]: Abstraction has 99038 states and 672684 transitions. [2021-05-21 20:43:47,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 99038 states and 672684 transitions. [2021-05-21 20:43:48,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 20:43:48,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:48,188 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:48,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 20:43:48,388 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:43:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:48,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1505483020, now seen corresponding path program 44 times [2021-05-21 20:43:48,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:48,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911715585] [2021-05-21 20:43:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:43:48,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:48,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911715585] [2021-05-21 20:43:48,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911715585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:48,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966961642] [2021-05-21 20:43:48,442 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:48,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:48,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:48,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:43:48,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966961642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:48,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:48,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:43:48,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481646862] [2021-05-21 20:43:48,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:43:48,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:48,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:43:48,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:48,647 INFO L87 Difference]: Start difference. First operand 99038 states and 672684 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:51,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:51,924 INFO L93 Difference]: Finished difference Result 210905 states and 1398862 transitions. [2021-05-21 20:43:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:43:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 20:43:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:53,944 INFO L225 Difference]: With dead ends: 210905 [2021-05-21 20:43:53,944 INFO L226 Difference]: Without dead ends: 177289 [2021-05-21 20:43:53,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:43:54,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177289 states. [2021-05-21 20:43:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177289 to 87818. [2021-05-21 20:43:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87818 states, 87817 states have (on average 6.753339330653518) internal successors, (593058), 87817 states have internal predecessors, (593058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87818 states to 87818 states and 593058 transitions. [2021-05-21 20:43:59,293 INFO L78 Accepts]: Start accepts. Automaton has 87818 states and 593058 transitions. Word has length 37 [2021-05-21 20:43:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:59,294 INFO L482 AbstractCegarLoop]: Abstraction has 87818 states and 593058 transitions. [2021-05-21 20:43:59,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 87818 states and 593058 transitions. [2021-05-21 20:43:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 20:43:59,693 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:59,694 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:59,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:59,894 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:43:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:59,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1404559502, now seen corresponding path program 45 times [2021-05-21 20:43:59,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:59,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704984262] [2021-05-21 20:43:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:43:59,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:59,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704984262] [2021-05-21 20:43:59,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704984262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:59,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875888198] [2021-05-21 20:43:59,943 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:59,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:43:59,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:59,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:59,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-21 20:44:00,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875888198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:00,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:00,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-21 20:44:00,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618277565] [2021-05-21 20:44:00,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:44:00,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:00,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:44:00,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:44:00,125 INFO L87 Difference]: Start difference. First operand 87818 states and 593058 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:04,258 INFO L93 Difference]: Finished difference Result 192010 states and 1246834 transitions. [2021-05-21 20:44:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 20:44:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 20:44:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:05,228 INFO L225 Difference]: With dead ends: 192010 [2021-05-21 20:44:05,228 INFO L226 Difference]: Without dead ends: 178847 [2021-05-21 20:44:05,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 603.1ms TimeCoverageRelationStatistics Valid=263, Invalid=3397, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 20:44:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178847 states. [2021-05-21 20:44:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178847 to 100736. [2021-05-21 20:44:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100736 states, 100735 states have (on average 6.7786667990271505) internal successors, (682849), 100735 states have internal predecessors, (682849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100736 states to 100736 states and 682849 transitions. [2021-05-21 20:44:10,526 INFO L78 Accepts]: Start accepts. Automaton has 100736 states and 682849 transitions. Word has length 37 [2021-05-21 20:44:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:10,526 INFO L482 AbstractCegarLoop]: Abstraction has 100736 states and 682849 transitions. [2021-05-21 20:44:10,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 100736 states and 682849 transitions. [2021-05-21 20:44:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 20:44:10,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:10,853 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:11,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:11,053 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:44:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1180951440, now seen corresponding path program 46 times [2021-05-21 20:44:11,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:11,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476736540] [2021-05-21 20:44:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:44:11,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:11,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476736540] [2021-05-21 20:44:11,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476736540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:11,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121614942] [2021-05-21 20:44:11,092 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:11,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:44:11,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:11,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:44:11,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:44:11,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121614942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:11,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:11,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-05-21 20:44:11,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231557375] [2021-05-21 20:44:11,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:11,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:11,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:11,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:11,897 INFO L87 Difference]: Start difference. First operand 100736 states and 682849 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:14,020 INFO L93 Difference]: Finished difference Result 180763 states and 1186152 transitions. [2021-05-21 20:44:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:44:14,020 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 20:44:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:14,827 INFO L225 Difference]: With dead ends: 180763 [2021-05-21 20:44:14,827 INFO L226 Difference]: Without dead ends: 148324 [2021-05-21 20:44:14,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:44:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148324 states. [2021-05-21 20:44:18,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148324 to 100736. [2021-05-21 20:44:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100736 states, 100735 states have (on average 6.763855660892441) internal successors, (681357), 100735 states have internal predecessors, (681357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100736 states to 100736 states and 681357 transitions. [2021-05-21 20:44:19,681 INFO L78 Accepts]: Start accepts. Automaton has 100736 states and 681357 transitions. Word has length 37 [2021-05-21 20:44:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:19,682 INFO L482 AbstractCegarLoop]: Abstraction has 100736 states and 681357 transitions. [2021-05-21 20:44:19,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 100736 states and 681357 transitions. [2021-05-21 20:44:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 20:44:19,997 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:19,997 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:20,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:20,198 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:44:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:20,198 INFO L82 PathProgramCache]: Analyzing trace with hash -25562740, now seen corresponding path program 47 times [2021-05-21 20:44:20,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:20,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056320240] [2021-05-21 20:44:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:44:20,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:20,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056320240] [2021-05-21 20:44:20,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056320240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:20,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151719779] [2021-05-21 20:44:20,249 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:20,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:44:20,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:20,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-21 20:44:20,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151719779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:20,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:20,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:44:20,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033566195] [2021-05-21 20:44:20,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:44:20,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:20,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:44:20,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:20,419 INFO L87 Difference]: Start difference. First operand 100736 states and 681357 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:25,740 INFO L93 Difference]: Finished difference Result 257569 states and 1635717 transitions. [2021-05-21 20:44:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-21 20:44:25,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 20:44:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:26,910 INFO L225 Difference]: With dead ends: 257569 [2021-05-21 20:44:26,910 INFO L226 Difference]: Without dead ends: 207928 [2021-05-21 20:44:26,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 1577.4ms TimeCoverageRelationStatistics Valid=525, Invalid=6117, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 20:44:27,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207928 states. [2021-05-21 20:44:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207928 to 99243. [2021-05-21 20:44:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99243 states, 99242 states have (on average 6.815461195864654) internal successors, (676380), 99242 states have internal predecessors, (676380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:32,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99243 states to 99243 states and 676380 transitions. [2021-05-21 20:44:32,869 INFO L78 Accepts]: Start accepts. Automaton has 99243 states and 676380 transitions. Word has length 37 [2021-05-21 20:44:32,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:32,869 INFO L482 AbstractCegarLoop]: Abstraction has 99243 states and 676380 transitions. [2021-05-21 20:44:32,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:32,870 INFO L276 IsEmpty]: Start isEmpty. Operand 99243 states and 676380 transitions. [2021-05-21 20:44:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 20:44:33,307 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:33,307 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:33,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:33,508 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:44:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:33,508 INFO L82 PathProgramCache]: Analyzing trace with hash -931167312, now seen corresponding path program 48 times [2021-05-21 20:44:33,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:33,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115178860] [2021-05-21 20:44:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-21 20:44:33,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:33,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115178860] [2021-05-21 20:44:33,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115178860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:33,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546148158] [2021-05-21 20:44:33,549 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:33,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:44:33,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-21 20:44:33,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546148158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:33,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:33,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:44:33,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900604232] [2021-05-21 20:44:33,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:44:33,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:33,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:44:33,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:33,713 INFO L87 Difference]: Start difference. First operand 99243 states and 676380 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:39,896 INFO L93 Difference]: Finished difference Result 304259 states and 1944342 transitions. [2021-05-21 20:44:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-21 20:44:39,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 20:44:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:41,079 INFO L225 Difference]: With dead ends: 304259 [2021-05-21 20:44:41,079 INFO L226 Difference]: Without dead ends: 214089 [2021-05-21 20:44:41,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5022 ImplicationChecksByTransitivity, 1224.5ms TimeCoverageRelationStatistics Valid=1026, Invalid=11856, Unknown=0, NotChecked=0, Total=12882 [2021-05-21 20:44:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214089 states. [2021-05-21 20:44:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214089 to 120131. [2021-05-21 20:44:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120131 states, 120130 states have (on average 6.801115458253559) internal successors, (817018), 120130 states have internal predecessors, (817018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:48,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120131 states to 120131 states and 817018 transitions. [2021-05-21 20:44:48,951 INFO L78 Accepts]: Start accepts. Automaton has 120131 states and 817018 transitions. Word has length 37 [2021-05-21 20:44:48,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:48,951 INFO L482 AbstractCegarLoop]: Abstraction has 120131 states and 817018 transitions. [2021-05-21 20:44:48,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:48,951 INFO L276 IsEmpty]: Start isEmpty. Operand 120131 states and 817018 transitions. [2021-05-21 20:44:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 20:44:49,434 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:49,435 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:49,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-21 20:44:49,653 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:44:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash -944253574, now seen corresponding path program 49 times [2021-05-21 20:44:49,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:49,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470179645] [2021-05-21 20:44:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-21 20:44:49,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:49,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470179645] [2021-05-21 20:44:49,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470179645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:49,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396952702] [2021-05-21 20:44:49,713 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:49,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:44:49,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:44:49,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396952702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:49,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:49,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-21 20:44:49,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619174030] [2021-05-21 20:44:49,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:44:49,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:49,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:44:49,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:49,905 INFO L87 Difference]: Start difference. First operand 120131 states and 817018 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:50,674 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-05-21 20:44:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:56,737 INFO L93 Difference]: Finished difference Result 412845 states and 2712377 transitions. [2021-05-21 20:44:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 20:44:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 20:44:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:58,059 INFO L225 Difference]: With dead ends: 412845 [2021-05-21 20:44:58,059 INFO L226 Difference]: Without dead ends: 208159 [2021-05-21 20:44:58,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1208.9ms TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:44:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208159 states. [2021-05-21 20:45:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208159 to 81339. [2021-05-21 20:45:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81339 states, 81338 states have (on average 6.60852246182596) internal successors, (537524), 81338 states have internal predecessors, (537524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81339 states to 81339 states and 537524 transitions. [2021-05-21 20:45:03,661 INFO L78 Accepts]: Start accepts. Automaton has 81339 states and 537524 transitions. Word has length 37 [2021-05-21 20:45:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:03,661 INFO L482 AbstractCegarLoop]: Abstraction has 81339 states and 537524 transitions. [2021-05-21 20:45:03,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:03,661 INFO L276 IsEmpty]: Start isEmpty. Operand 81339 states and 537524 transitions. [2021-05-21 20:45:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 20:45:03,926 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:03,926 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:04,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:04,127 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:45:04,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:04,127 INFO L82 PathProgramCache]: Analyzing trace with hash -265285954, now seen corresponding path program 50 times [2021-05-21 20:45:04,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:04,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959638367] [2021-05-21 20:45:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:45:04,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:04,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959638367] [2021-05-21 20:45:04,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959638367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:04,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981249157] [2021-05-21 20:45:04,179 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:04,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:04,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:04,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:04,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-21 20:45:04,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981249157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:04,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:04,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-21 20:45:04,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539967774] [2021-05-21 20:45:04,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:45:04,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:04,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:45:04,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:45:04,335 INFO L87 Difference]: Start difference. First operand 81339 states and 537524 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:06,108 INFO L93 Difference]: Finished difference Result 100680 states and 663750 transitions. [2021-05-21 20:45:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:45:06,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 20:45:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:07,097 INFO L225 Difference]: With dead ends: 100680 [2021-05-21 20:45:07,097 INFO L226 Difference]: Without dead ends: 93275 [2021-05-21 20:45:07,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:45:07,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93275 states. [2021-05-21 20:45:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93275 to 84323. [2021-05-21 20:45:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84323 states, 84322 states have (on average 6.609212305210977) internal successors, (557302), 84322 states have internal predecessors, (557302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84323 states to 84323 states and 557302 transitions. [2021-05-21 20:45:10,486 INFO L78 Accepts]: Start accepts. Automaton has 84323 states and 557302 transitions. Word has length 37 [2021-05-21 20:45:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:10,486 INFO L482 AbstractCegarLoop]: Abstraction has 84323 states and 557302 transitions. [2021-05-21 20:45:10,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:10,486 INFO L276 IsEmpty]: Start isEmpty. Operand 84323 states and 557302 transitions. [2021-05-21 20:45:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:45:10,961 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:10,961 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:11,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-21 20:45:11,162 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:45:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:11,162 INFO L82 PathProgramCache]: Analyzing trace with hash 941176573, now seen corresponding path program 51 times [2021-05-21 20:45:11,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:11,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010372790] [2021-05-21 20:45:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-21 20:45:11,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:11,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010372790] [2021-05-21 20:45:11,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010372790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:11,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994406392] [2021-05-21 20:45:11,192 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:11,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:45:11,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:11,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:11,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:11,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994406392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:11,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:11,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:45:11,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614767466] [2021-05-21 20:45:11,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:45:11,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:11,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:45:11,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:11,379 INFO L87 Difference]: Start difference. First operand 84323 states and 557302 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:13,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:13,309 INFO L93 Difference]: Finished difference Result 138523 states and 880908 transitions. [2021-05-21 20:45:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:45:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 20:45:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:13,984 INFO L225 Difference]: With dead ends: 138523 [2021-05-21 20:45:13,985 INFO L226 Difference]: Without dead ends: 121480 [2021-05-21 20:45:13,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:45:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121480 states. [2021-05-21 20:45:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121480 to 82775. [2021-05-21 20:45:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82775 states, 82774 states have (on average 6.541510619276584) internal successors, (541467), 82774 states have internal predecessors, (541467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82775 states to 82775 states and 541467 transitions. [2021-05-21 20:45:17,511 INFO L78 Accepts]: Start accepts. Automaton has 82775 states and 541467 transitions. Word has length 38 [2021-05-21 20:45:17,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:17,511 INFO L482 AbstractCegarLoop]: Abstraction has 82775 states and 541467 transitions. [2021-05-21 20:45:17,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 82775 states and 541467 transitions. [2021-05-21 20:45:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:45:18,575 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:18,575 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:18,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 20:45:18,781 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:45:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash -329563039, now seen corresponding path program 52 times [2021-05-21 20:45:18,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:18,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934657042] [2021-05-21 20:45:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:18,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:18,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934657042] [2021-05-21 20:45:18,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934657042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:18,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869907475] [2021-05-21 20:45:18,813 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:18,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:45:18,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:18,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:18,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:18,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869907475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:18,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:18,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:45:18,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607649073] [2021-05-21 20:45:18,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:45:18,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:18,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:45:18,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:18,958 INFO L87 Difference]: Start difference. First operand 82775 states and 541467 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:20,716 INFO L93 Difference]: Finished difference Result 127682 states and 811850 transitions. [2021-05-21 20:45:20,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:45:20,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 20:45:20,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:21,296 INFO L225 Difference]: With dead ends: 127682 [2021-05-21 20:45:21,296 INFO L226 Difference]: Without dead ends: 107548 [2021-05-21 20:45:21,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:45:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107548 states. [2021-05-21 20:45:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107548 to 81227. [2021-05-21 20:45:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-05-21 20:45:24,865 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-05-21 20:45:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:24,865 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-05-21 20:45:24,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-05-21 20:45:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:45:25,120 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:25,120 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:25,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:25,320 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:45:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1350631393, now seen corresponding path program 53 times [2021-05-21 20:45:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332244071] [2021-05-21 20:45:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:25,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:25,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332244071] [2021-05-21 20:45:25,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332244071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:25,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509724980] [2021-05-21 20:45:25,352 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:25,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:45:25,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:25,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:25,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:25,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509724980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:25,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:25,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:45:25,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086869841] [2021-05-21 20:45:25,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:45:25,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:25,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:45:25,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:45:25,493 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:27,684 INFO L93 Difference]: Finished difference Result 112190 states and 716949 transitions. [2021-05-21 20:45:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:45:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 20:45:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:28,743 INFO L225 Difference]: With dead ends: 112190 [2021-05-21 20:45:28,744 INFO L226 Difference]: Without dead ends: 109091 [2021-05-21 20:45:28,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:45:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109091 states. [2021-05-21 20:45:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109091 to 81227. [2021-05-21 20:45:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-05-21 20:45:32,319 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-05-21 20:45:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:32,319 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-05-21 20:45:32,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-05-21 20:45:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:45:32,566 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:32,566 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:32,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 20:45:32,767 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:45:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:32,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1112457229, now seen corresponding path program 54 times [2021-05-21 20:45:32,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:32,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636447719] [2021-05-21 20:45:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:32,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:32,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636447719] [2021-05-21 20:45:32,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636447719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:32,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951484029] [2021-05-21 20:45:32,819 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:32,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:45:32,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:32,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:32,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:32,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951484029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:32,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:32,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:45:32,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332491816] [2021-05-21 20:45:32,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:45:32,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:32,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:45:32,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:45:32,959 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:34,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:34,650 INFO L93 Difference]: Finished difference Result 119937 states and 766726 transitions. [2021-05-21 20:45:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:45:34,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 20:45:34,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:35,843 INFO L225 Difference]: With dead ends: 119937 [2021-05-21 20:45:35,843 INFO L226 Difference]: Without dead ends: 116839 [2021-05-21 20:45:35,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:45:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116839 states. [2021-05-21 20:45:38,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116839 to 81227. [2021-05-21 20:45:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-05-21 20:45:39,501 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-05-21 20:45:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:39,502 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-05-21 20:45:39,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-05-21 20:45:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:45:39,843 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:39,843 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:40,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:40,055 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:45:40,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:40,056 INFO L82 PathProgramCache]: Analyzing trace with hash -881687477, now seen corresponding path program 55 times [2021-05-21 20:45:40,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:40,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705768611] [2021-05-21 20:45:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:40,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:40,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705768611] [2021-05-21 20:45:40,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705768611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:40,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430232023] [2021-05-21 20:45:40,085 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:40,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:40,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:40,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430232023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:40,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:40,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 20:45:40,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196302165] [2021-05-21 20:45:40,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:45:40,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:40,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:45:40,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:40,235 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:41,985 INFO L93 Difference]: Finished difference Result 113755 states and 717330 transitions. [2021-05-21 20:45:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:45:41,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 20:45:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:42,534 INFO L225 Difference]: With dead ends: 113755 [2021-05-21 20:45:42,534 INFO L226 Difference]: Without dead ends: 102909 [2021-05-21 20:45:42,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:45:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102909 states. [2021-05-21 20:45:45,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102909 to 81227. [2021-05-21 20:45:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.452170487282397) internal successors, (524084), 81226 states have internal predecessors, (524084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 524084 transitions. [2021-05-21 20:45:45,818 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 524084 transitions. Word has length 38 [2021-05-21 20:45:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:45,818 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 524084 transitions. [2021-05-21 20:45:45,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 524084 transitions. [2021-05-21 20:45:46,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:45:46,078 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:46,078 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:46,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-21 20:45:46,279 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:45:46,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:46,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2142540207, now seen corresponding path program 56 times [2021-05-21 20:45:46,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:46,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068190402] [2021-05-21 20:45:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:46,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:46,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068190402] [2021-05-21 20:45:46,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068190402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:46,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725748112] [2021-05-21 20:45:46,312 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:46,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:46,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:46,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:46,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:46,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725748112] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:46,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:46,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 20:45:46,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040834463] [2021-05-21 20:45:46,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:45:46,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:45:46,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:46,433 INFO L87 Difference]: Start difference. First operand 81227 states and 524084 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:47,953 INFO L93 Difference]: Finished difference Result 107558 states and 678750 transitions. [2021-05-21 20:45:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:45:47,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 20:45:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:49,038 INFO L225 Difference]: With dead ends: 107558 [2021-05-21 20:45:49,038 INFO L226 Difference]: Without dead ends: 99816 [2021-05-21 20:45:49,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:49,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99816 states. [2021-05-21 20:45:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99816 to 79679. [2021-05-21 20:45:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79679 states, 79678 states have (on average 6.398215316649514) internal successors, (509797), 79678 states have internal predecessors, (509797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79679 states to 79679 states and 509797 transitions. [2021-05-21 20:45:52,369 INFO L78 Accepts]: Start accepts. Automaton has 79679 states and 509797 transitions. Word has length 38 [2021-05-21 20:45:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:52,369 INFO L482 AbstractCegarLoop]: Abstraction has 79679 states and 509797 transitions. [2021-05-21 20:45:52,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 79679 states and 509797 transitions. [2021-05-21 20:45:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:45:52,710 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:52,711 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:52,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:52,912 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:45:52,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:52,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1121471853, now seen corresponding path program 57 times [2021-05-21 20:45:52,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:52,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586351804] [2021-05-21 20:45:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-21 20:45:52,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:52,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586351804] [2021-05-21 20:45:52,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586351804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:52,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447637459] [2021-05-21 20:45:52,943 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:53,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:45:53,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:53,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:53,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447637459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:53,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:53,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:45:53,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376522018] [2021-05-21 20:45:53,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:45:53,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:53,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:45:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:53,104 INFO L87 Difference]: Start difference. First operand 79679 states and 509797 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:55,100 INFO L93 Difference]: Finished difference Result 140075 states and 878174 transitions. [2021-05-21 20:45:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:45:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 20:45:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:55,707 INFO L225 Difference]: With dead ends: 140075 [2021-05-21 20:45:55,707 INFO L226 Difference]: Without dead ends: 105995 [2021-05-21 20:45:55,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:45:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105995 states. [2021-05-21 20:45:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105995 to 70391. [2021-05-21 20:45:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70391 states, 70390 states have (on average 6.35452479045319) internal successors, (447295), 70390 states have internal predecessors, (447295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:59,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70391 states to 70391 states and 447295 transitions. [2021-05-21 20:45:59,047 INFO L78 Accepts]: Start accepts. Automaton has 70391 states and 447295 transitions. Word has length 38 [2021-05-21 20:45:59,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:59,047 INFO L482 AbstractCegarLoop]: Abstraction has 70391 states and 447295 transitions. [2021-05-21 20:45:59,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:59,047 INFO L276 IsEmpty]: Start isEmpty. Operand 70391 states and 447295 transitions. [2021-05-21 20:45:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:45:59,264 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:59,264 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:59,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-21 20:45:59,465 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:45:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash 554192305, now seen corresponding path program 58 times [2021-05-21 20:45:59,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:59,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398140452] [2021-05-21 20:45:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:59,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:59,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398140452] [2021-05-21 20:45:59,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398140452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:59,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972573057] [2021-05-21 20:45:59,499 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:59,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:45:59,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:59,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:45:59,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972573057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:59,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:59,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:45:59,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395246000] [2021-05-21 20:45:59,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:45:59,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:59,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:45:59,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:59,621 INFO L87 Difference]: Start difference. First operand 70391 states and 447295 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:00,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:00,958 INFO L93 Difference]: Finished difference Result 82778 states and 524444 transitions. [2021-05-21 20:46:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:46:00,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 20:46:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:01,313 INFO L225 Difference]: With dead ends: 82778 [2021-05-21 20:46:01,313 INFO L226 Difference]: Without dead ends: 79679 [2021-05-21 20:46:01,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:46:01,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79679 states. [2021-05-21 20:46:03,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79679 to 73487. [2021-05-21 20:46:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73487 states, 73486 states have (on average 6.349250197316496) internal successors, (466581), 73486 states have internal predecessors, (466581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73487 states to 73487 states and 466581 transitions. [2021-05-21 20:46:04,229 INFO L78 Accepts]: Start accepts. Automaton has 73487 states and 466581 transitions. Word has length 38 [2021-05-21 20:46:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:04,229 INFO L482 AbstractCegarLoop]: Abstraction has 73487 states and 466581 transitions. [2021-05-21 20:46:04,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 73487 states and 466581 transitions. [2021-05-21 20:46:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:46:04,447 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:04,447 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-05-21 20:46:04,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:04,647 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:46:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:04,648 INFO L82 PathProgramCache]: Analyzing trace with hash -41639662, now seen corresponding path program 59 times [2021-05-21 20:46:04,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:04,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901467418] [2021-05-21 20:46:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:46:04,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:04,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901467418] [2021-05-21 20:46:04,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901467418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:04,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342746786] [2021-05-21 20:46:04,693 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:04,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:46:04,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:46:04,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:46:04,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:46:04,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342746786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:04,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:04,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-05-21 20:46:04,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900975098] [2021-05-21 20:46:04,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:46:04,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:04,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:46:04,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:46:04,908 INFO L87 Difference]: Start difference. First operand 73487 states and 466581 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:07,301 INFO L93 Difference]: Finished difference Result 155912 states and 983338 transitions. [2021-05-21 20:46:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:46:07,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 20:46:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:08,213 INFO L225 Difference]: With dead ends: 155912 [2021-05-21 20:46:08,213 INFO L226 Difference]: Without dead ends: 151952 [2021-05-21 20:46:08,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:46:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151952 states. [2021-05-21 20:46:11,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151952 to 119841. [2021-05-21 20:46:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119841 states, 119840 states have (on average 6.5424148865153535) internal successors, (784043), 119840 states have internal predecessors, (784043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:13,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119841 states to 119841 states and 784043 transitions. [2021-05-21 20:46:13,581 INFO L78 Accepts]: Start accepts. Automaton has 119841 states and 784043 transitions. Word has length 39 [2021-05-21 20:46:13,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:13,581 INFO L482 AbstractCegarLoop]: Abstraction has 119841 states and 784043 transitions. [2021-05-21 20:46:13,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 119841 states and 784043 transitions. [2021-05-21 20:46:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:46:13,985 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:13,985 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-05-21 20:46:14,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-21 20:46:14,186 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:46:14,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:14,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2062562636, now seen corresponding path program 60 times [2021-05-21 20:46:14,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:14,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234807704] [2021-05-21 20:46:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-21 20:46:14,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:14,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234807704] [2021-05-21 20:46:14,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234807704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:14,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061695137] [2021-05-21 20:46:14,231 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:14,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:46:14,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:46:14,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:46:14,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:46:14,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061695137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:14,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:14,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-05-21 20:46:14,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821806875] [2021-05-21 20:46:14,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:46:14,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:14,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:46:14,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:46:14,420 INFO L87 Difference]: Start difference. First operand 119841 states and 784043 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:21,024 INFO L93 Difference]: Finished difference Result 363219 states and 2317845 transitions. [2021-05-21 20:46:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 20:46:21,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 20:46:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:24,528 INFO L225 Difference]: With dead ends: 363219 [2021-05-21 20:46:24,528 INFO L226 Difference]: Without dead ends: 351491 [2021-05-21 20:46:24,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 450.5ms TimeCoverageRelationStatistics Valid=198, Invalid=2154, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 20:46:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351491 states. [2021-05-21 20:46:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351491 to 205350. [2021-05-21 20:46:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205350 states, 205349 states have (on average 6.88260960608525) internal successors, (1413337), 205349 states have internal predecessors, (1413337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205350 states to 205350 states and 1413337 transitions. [2021-05-21 20:46:37,660 INFO L78 Accepts]: Start accepts. Automaton has 205350 states and 1413337 transitions. Word has length 39 [2021-05-21 20:46:37,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:37,660 INFO L482 AbstractCegarLoop]: Abstraction has 205350 states and 1413337 transitions. [2021-05-21 20:46:37,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 205350 states and 1413337 transitions. [2021-05-21 20:46:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:46:38,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:38,567 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-05-21 20:46:38,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:38,769 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:46:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash -828443812, now seen corresponding path program 61 times [2021-05-21 20:46:38,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:38,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598500800] [2021-05-21 20:46:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-21 20:46:38,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:38,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598500800] [2021-05-21 20:46:38,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598500800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:38,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769501499] [2021-05-21 20:46:38,825 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:38,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:46:38,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-21 20:46:39,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769501499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:39,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:39,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:46:39,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193185474] [2021-05-21 20:46:39,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:46:39,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:39,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:46:39,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:46:39,011 INFO L87 Difference]: Start difference. First operand 205350 states and 1413337 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:46,251 INFO L93 Difference]: Finished difference Result 505241 states and 3345930 transitions. [2021-05-21 20:46:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 20:46:46,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 20:46:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:50,974 INFO L225 Difference]: With dead ends: 505241 [2021-05-21 20:46:50,974 INFO L226 Difference]: Without dead ends: 471693 [2021-05-21 20:46:50,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 362.3ms TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:46:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471693 states. [2021-05-21 20:47:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471693 to 273193. [2021-05-21 20:47:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273193 states, 273192 states have (on average 7.154719025447305) internal successors, (1954612), 273192 states have internal predecessors, (1954612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:47:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273193 states to 273193 states and 1954612 transitions. [2021-05-21 20:47:08,216 INFO L78 Accepts]: Start accepts. Automaton has 273193 states and 1954612 transitions. Word has length 39 [2021-05-21 20:47:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:47:08,216 INFO L482 AbstractCegarLoop]: Abstraction has 273193 states and 1954612 transitions. [2021-05-21 20:47:08,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:47:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 273193 states and 1954612 transitions. [2021-05-21 20:47:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:47:10,563 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:47:10,563 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-05-21 20:47:10,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-21 20:47:10,777 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:47:10,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:47:10,777 INFO L82 PathProgramCache]: Analyzing trace with hash -410626040, now seen corresponding path program 62 times [2021-05-21 20:47:10,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:47:10,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701370497] [2021-05-21 20:47:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:47:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:47:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-21 20:47:10,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:47:10,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701370497] [2021-05-21 20:47:10,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701370497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:47:10,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767758941] [2021-05-21 20:47:10,862 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:47:10,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:47:10,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:47:10,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:47:10,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:47:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:47:11,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767758941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:47:11,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:47:11,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-05-21 20:47:11,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746575235] [2021-05-21 20:47:11,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:47:11,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:47:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:47:11,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:47:11,121 INFO L87 Difference]: Start difference. First operand 273193 states and 1954612 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:47:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:47:21,607 INFO L93 Difference]: Finished difference Result 514006 states and 3547889 transitions. [2021-05-21 20:47:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 20:47:21,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 20:47:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:47:26,730 INFO L225 Difference]: With dead ends: 514006 [2021-05-21 20:47:26,731 INFO L226 Difference]: Without dead ends: 493775 [2021-05-21 20:47:26,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 718.6ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 20:47:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493775 states. [2021-05-21 20:47:43,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493775 to 333832. [2021-05-21 20:47:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333832 states, 333831 states have (on average 7.313104534929351) internal successors, (2441341), 333831 states have internal predecessors, (2441341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:47:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333832 states to 333832 states and 2441341 transitions. [2021-05-21 20:47:48,184 INFO L78 Accepts]: Start accepts. Automaton has 333832 states and 2441341 transitions. Word has length 39 [2021-05-21 20:47:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:47:48,184 INFO L482 AbstractCegarLoop]: Abstraction has 333832 states and 2441341 transitions. [2021-05-21 20:47:48,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:47:48,185 INFO L276 IsEmpty]: Start isEmpty. Operand 333832 states and 2441341 transitions. [2021-05-21 20:47:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:47:51,235 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:47:51,235 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-05-21 20:47:51,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-21 20:47:51,459 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:47:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:47:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1520847550, now seen corresponding path program 63 times [2021-05-21 20:47:51,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:47:51,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108410853] [2021-05-21 20:47:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:47:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:47:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-21 20:47:51,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:47:51,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108410853] [2021-05-21 20:47:51,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108410853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:47:51,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766777493] [2021-05-21 20:47:51,516 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:47:51,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:47:51,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:47:51,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:47:51,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:47:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-21 20:47:51,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766777493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:47:51,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:47:51,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-05-21 20:47:51,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993794154] [2021-05-21 20:47:51,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:47:51,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:47:51,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:47:51,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:47:51,803 INFO L87 Difference]: Start difference. First operand 333832 states and 2441341 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:48:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:48:06,160 INFO L93 Difference]: Finished difference Result 673375 states and 4722113 transitions. [2021-05-21 20:48:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 20:48:06,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 20:48:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:48:12,883 INFO L225 Difference]: With dead ends: 673375 [2021-05-21 20:48:12,883 INFO L226 Difference]: Without dead ends: 650182 [2021-05-21 20:48:12,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1350.2ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 20:48:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650182 states. [2021-05-21 20:48:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650182 to 443520. [2021-05-21 20:48:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443520 states, 443519 states have (on average 7.412081556821692) internal successors, (3287399), 443519 states have internal predecessors, (3287399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:48:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443520 states to 443520 states and 3287399 transitions. [2021-05-21 20:48:46,038 INFO L78 Accepts]: Start accepts. Automaton has 443520 states and 3287399 transitions. Word has length 39 [2021-05-21 20:48:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:48:46,062 INFO L482 AbstractCegarLoop]: Abstraction has 443520 states and 3287399 transitions. [2021-05-21 20:48:46,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:48:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 443520 states and 3287399 transitions. [2021-05-21 20:48:50,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 20:48:50,085 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:48:50,085 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 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] [2021-05-21 20:48:50,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-21 20:48:50,301 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-21 20:48:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:48:50,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1403202507, now seen corresponding path program 64 times [2021-05-21 20:48:50,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:48:50,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012241703] [2021-05-21 20:48:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:48:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:48:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:48:50,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:48:50,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012241703] [2021-05-21 20:48:50,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012241703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:48:50,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776238387] [2021-05-21 20:48:50,356 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:48:51,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:48:51,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:48:51,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:48:51,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:48:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:48:51,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776238387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:48:51,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:48:51,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2021-05-21 20:48:51,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374231367] [2021-05-21 20:48:51,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:48:51,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:48:51,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:48:51,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:48:51,539 INFO L87 Difference]: Start difference. First operand 443520 states and 3287399 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)