/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/popl20/min-max-inc.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 15:29:45,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 15:29:45,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 15:29:45,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 15:29:45,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 15:29:45,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 15:29:45,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 15:29:45,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 15:29:45,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 15:29:45,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 15:29:45,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 15:29:45,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 15:29:45,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 15:29:45,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 15:29:45,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 15:29:45,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 15:29:45,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 15:29:45,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 15:29:45,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 15:29:45,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 15:29:45,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 15:29:45,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 15:29:45,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 15:29:45,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 15:29:45,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 15:29:45,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 15:29:45,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 15:29:45,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 15:29:45,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 15:29:45,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 15:29:45,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 15:29:45,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 15:29:45,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 15:29:45,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 15:29:45,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 15:29:45,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 15:29:45,382 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 [2021-05-03 15:29:45,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 15:29:45,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 15:29:45,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 15:29:45,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 15:29:45,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 15:29:45,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 15:29:45,397 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 15:29:45,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 15:29:45,397 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 15:29:45,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 15:29:45,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 15:29:45,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 15:29:45,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 15:29:45,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 15:29:45,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 15:29:45,398 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 15:29:45,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 15:29:45,398 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 15:29:45,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 15:29:45,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 15:29:45,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 15:29:45,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 15:29:45,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 15:29:45,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:29:45,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 15:29:45,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 15:29:45,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 15:29:45,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 15:29:45,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 15:29:45,399 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 15:29:45,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 15:29:45,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 15:29:45,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 15:29:45,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 15:29:45,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 15:29:45,663 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 15:29:45,664 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 15:29:45,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl [2021-05-03 15:29:45,664 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl' [2021-05-03 15:29:45,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 15:29:45,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 15:29:45,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 15:29:45,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 15:29:45,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 15:29:45,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:29:45" (1/1) ... [2021-05-03 15:29:45,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:29:45" (1/1) ... [2021-05-03 15:29:45,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 15:29:45,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 15:29:45,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 15:29:45,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 15:29:45,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:29:45" (1/1) ... [2021-05-03 15:29:45,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:29:45" (1/1) ... [2021-05-03 15:29:45,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:29:45" (1/1) ... [2021-05-03 15:29:45,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:29:45" (1/1) ... [2021-05-03 15:29:45,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:29:45" (1/1) ... [2021-05-03 15:29:45,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:29:45" (1/1) ... [2021-05-03 15:29:45,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:29:45" (1/1) ... [2021-05-03 15:29:45,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 15:29:45,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 15:29:45,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 15:29:45,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 15:29:45,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:29:45" (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 [2021-05-03 15:29:45,816 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 15:29:45,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 15:29:45,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 15:29:45,817 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 15:29:45,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 15:29:45,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 15:29:45,817 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 15:29:45,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 15:29:45,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 15:29:45,818 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 15:29:45,818 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 15:29:45,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 15:29:45,819 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 15:29:45,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 15:29:45,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 15:29:45,820 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 15:29:45,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 15:29:45,978 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 15:29:45,980 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:29:45 BoogieIcfgContainer [2021-05-03 15:29:45,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 15:29:45,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 15:29:45,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 15:29:45,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 15:29:45,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:29:45" (1/2) ... [2021-05-03 15:29:45,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef9bece and model type min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 03:29:45, skipping insertion in model container [2021-05-03 15:29:45,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:29:45" (2/2) ... [2021-05-03 15:29:45,984 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc.wvr.bpl [2021-05-03 15:29:45,988 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 15:29:45,988 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 15:29:45,990 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 15:29:45,990 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 15:29:46,029 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-03 15:29:46,041 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-03 15:29:46,070 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 15:29:46,070 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 15:29:46,070 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 15:29:46,070 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 15:29:46,070 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 15:29:46,070 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 15:29:46,070 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 15:29:46,070 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 15:29:46,076 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 35 transitions, 102 flow [2021-05-03 15:29:46,145 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:29:46,169 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:46,170 INFO L551 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] [2021-05-03 15:29:46,170 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash -596639688, now seen corresponding path program 1 times [2021-05-03 15:29:46,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:46,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040352520] [2021-05-03 15:29:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:46,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040352520] [2021-05-03 15:29:46,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:29:46,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:29:46,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787692668] [2021-05-03 15:29:46,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:29:46,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:29:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:29:46,295 INFO L87 Difference]: Start difference. First operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-05-03 15:29:46,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:46,351 INFO L93 Difference]: Finished difference Result 961 states and 3450 transitions. [2021-05-03 15:29:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:29:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 [2021-05-03 15:29:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:46,366 INFO L225 Difference]: With dead ends: 961 [2021-05-03 15:29:46,366 INFO L226 Difference]: Without dead ends: 614 [2021-05-03 15:29:46,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:29:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-05-03 15:29:46,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-05-03 15:29:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.592169657422512) internal successors, (2202), 613 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2202 transitions. [2021-05-03 15:29:46,442 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2202 transitions. Word has length 23 [2021-05-03 15:29:46,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:46,443 INFO L480 AbstractCegarLoop]: Abstraction has 614 states and 2202 transitions. [2021-05-03 15:29:46,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-05-03 15:29:46,443 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2202 transitions. [2021-05-03 15:29:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:29:46,445 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:46,446 INFO L551 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] [2021-05-03 15:29:46,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 15:29:46,446 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:46,447 INFO L82 PathProgramCache]: Analyzing trace with hash 616979414, now seen corresponding path program 2 times [2021-05-03 15:29:46,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:46,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021366864] [2021-05-03 15:29:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:46,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021366864] [2021-05-03 15:29:46,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:29:46,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:29:46,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484674038] [2021-05-03 15:29:46,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:29:46,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:46,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:29:46,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:29:46,491 INFO L87 Difference]: Start difference. First operand 614 states and 2202 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-05-03 15:29:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:46,590 INFO L93 Difference]: Finished difference Result 2435 states and 8733 transitions. [2021-05-03 15:29:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:29:46,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 [2021-05-03 15:29:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:46,598 INFO L225 Difference]: With dead ends: 2435 [2021-05-03 15:29:46,598 INFO L226 Difference]: Without dead ends: 1497 [2021-05-03 15:29:46,599 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:29:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-05-03 15:29:46,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 859. [2021-05-03 15:29:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.5442890442890445) internal successors, (3041), 858 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3041 transitions. [2021-05-03 15:29:46,630 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3041 transitions. Word has length 23 [2021-05-03 15:29:46,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:46,630 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 3041 transitions. [2021-05-03 15:29:46,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-05-03 15:29:46,631 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3041 transitions. [2021-05-03 15:29:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:29:46,632 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:46,633 INFO L551 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] [2021-05-03 15:29:46,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 15:29:46,633 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:46,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2060589364, now seen corresponding path program 3 times [2021-05-03 15:29:46,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:46,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937068343] [2021-05-03 15:29:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:46,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937068343] [2021-05-03 15:29:46,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:29:46,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:29:46,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287552643] [2021-05-03 15:29:46,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:29:46,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:46,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:29:46,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:29:46,674 INFO L87 Difference]: Start difference. First operand 859 states and 3041 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-05-03 15:29:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:46,779 INFO L93 Difference]: Finished difference Result 3289 states and 11673 transitions. [2021-05-03 15:29:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:29:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 [2021-05-03 15:29:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:46,790 INFO L225 Difference]: With dead ends: 3289 [2021-05-03 15:29:46,791 INFO L226 Difference]: Without dead ends: 2391 [2021-05-03 15:29:46,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:29:46,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-05-03 15:29:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 910. [2021-05-03 15:29:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.553355335533553) internal successors, (3230), 909 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3230 transitions. [2021-05-03 15:29:46,827 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3230 transitions. Word has length 23 [2021-05-03 15:29:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:46,830 INFO L480 AbstractCegarLoop]: Abstraction has 910 states and 3230 transitions. [2021-05-03 15:29:46,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-05-03 15:29:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3230 transitions. [2021-05-03 15:29:46,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:29:46,832 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:46,832 INFO L551 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] [2021-05-03 15:29:46,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 15:29:46,833 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:46,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:46,833 INFO L82 PathProgramCache]: Analyzing trace with hash -375854000, now seen corresponding path program 4 times [2021-05-03 15:29:46,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:46,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904928492] [2021-05-03 15:29:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:46,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904928492] [2021-05-03 15:29:46,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:29:46,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:29:46,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978204480] [2021-05-03 15:29:46,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:29:46,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:46,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:29:46,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:29:46,875 INFO L87 Difference]: Start difference. First operand 910 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-05-03 15:29:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:46,892 INFO L93 Difference]: Finished difference Result 1081 states and 3814 transitions. [2021-05-03 15:29:46,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:29:46,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 [2021-05-03 15:29:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:46,896 INFO L225 Difference]: With dead ends: 1081 [2021-05-03 15:29:46,896 INFO L226 Difference]: Without dead ends: 830 [2021-05-03 15:29:46,897 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:29:46,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-05-03 15:29:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2021-05-03 15:29:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4861278648974667) internal successors, (2890), 829 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2890 transitions. [2021-05-03 15:29:46,915 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2890 transitions. Word has length 23 [2021-05-03 15:29:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:46,915 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 2890 transitions. [2021-05-03 15:29:46,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-05-03 15:29:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2890 transitions. [2021-05-03 15:29:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:29:46,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:46,917 INFO L551 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] [2021-05-03 15:29:46,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 15:29:46,918 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:46,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1603494326, now seen corresponding path program 1 times [2021-05-03 15:29:46,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:46,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541719891] [2021-05-03 15:29:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:47,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541719891] [2021-05-03 15:29:47,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415242645] [2021-05-03 15:29:47,014 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 [2021-05-03 15:29:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:47,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:29:47,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:47,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:47,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-03 15:29:47,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012043770] [2021-05-03 15:29:47,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:29:47,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:47,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:29:47,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:29:47,184 INFO L87 Difference]: Start difference. First operand 830 states and 2890 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:47,234 INFO L93 Difference]: Finished difference Result 1914 states and 6600 transitions. [2021-05-03 15:29:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:29:47,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 15:29:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:47,243 INFO L225 Difference]: With dead ends: 1914 [2021-05-03 15:29:47,244 INFO L226 Difference]: Without dead ends: 1914 [2021-05-03 15:29:47,244 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:29:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-05-03 15:29:47,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1087. [2021-05-03 15:29:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.603130755064457) internal successors, (3913), 1086 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3913 transitions. [2021-05-03 15:29:47,276 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3913 transitions. Word has length 25 [2021-05-03 15:29:47,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:47,276 INFO L480 AbstractCegarLoop]: Abstraction has 1087 states and 3913 transitions. [2021-05-03 15:29:47,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3913 transitions. [2021-05-03 15:29:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:29:47,280 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:47,280 INFO L551 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] [2021-05-03 15:29:47,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:47,495 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:47,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:47,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1044941832, now seen corresponding path program 1 times [2021-05-03 15:29:47,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:47,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52042796] [2021-05-03 15:29:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:47,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52042796] [2021-05-03 15:29:47,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:29:47,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:29:47,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720715442] [2021-05-03 15:29:47,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:29:47,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:47,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:29:47,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:29:47,527 INFO L87 Difference]: Start difference. First operand 1087 states and 3913 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:47,560 INFO L93 Difference]: Finished difference Result 1486 states and 5095 transitions. [2021-05-03 15:29:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:29:47,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:29:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:47,566 INFO L225 Difference]: With dead ends: 1486 [2021-05-03 15:29:47,566 INFO L226 Difference]: Without dead ends: 1456 [2021-05-03 15:29:47,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:29:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-05-03 15:29:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1266. [2021-05-03 15:29:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.5177865612648223) internal successors, (4450), 1265 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:47,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4450 transitions. [2021-05-03 15:29:47,591 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4450 transitions. Word has length 25 [2021-05-03 15:29:47,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:47,591 INFO L480 AbstractCegarLoop]: Abstraction has 1266 states and 4450 transitions. [2021-05-03 15:29:47,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4450 transitions. [2021-05-03 15:29:47,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:29:47,594 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:47,594 INFO L551 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] [2021-05-03 15:29:47,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 15:29:47,594 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:47,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:47,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1204324088, now seen corresponding path program 1 times [2021-05-03 15:29:47,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:47,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554024042] [2021-05-03 15:29:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:47,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554024042] [2021-05-03 15:29:47,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:29:47,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:29:47,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000150553] [2021-05-03 15:29:47,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:29:47,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:47,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:29:47,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:29:47,623 INFO L87 Difference]: Start difference. First operand 1266 states and 4450 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:47,664 INFO L93 Difference]: Finished difference Result 1766 states and 6108 transitions. [2021-05-03 15:29:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:29:47,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:29:47,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:47,672 INFO L225 Difference]: With dead ends: 1766 [2021-05-03 15:29:47,672 INFO L226 Difference]: Without dead ends: 1644 [2021-05-03 15:29:47,672 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:29:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-05-03 15:29:47,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1367. [2021-05-03 15:29:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.5439238653001466) internal successors, (4841), 1366 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4841 transitions. [2021-05-03 15:29:47,705 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4841 transitions. Word has length 25 [2021-05-03 15:29:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:47,705 INFO L480 AbstractCegarLoop]: Abstraction has 1367 states and 4841 transitions. [2021-05-03 15:29:47,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4841 transitions. [2021-05-03 15:29:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:29:47,709 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:47,710 INFO L551 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] [2021-05-03 15:29:47,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 15:29:47,710 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:47,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:47,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1327684600, now seen corresponding path program 2 times [2021-05-03 15:29:47,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:47,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082588343] [2021-05-03 15:29:47,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:47,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082588343] [2021-05-03 15:29:47,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819489589] [2021-05-03 15:29:47,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 15:29:47,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:29:47,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:47,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 15:29:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:47,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:47,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-05-03 15:29:47,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322730956] [2021-05-03 15:29:47,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:29:47,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:47,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:29:47,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:29:47,917 INFO L87 Difference]: Start difference. First operand 1367 states and 4841 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2021-05-03 15:29:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:48,625 INFO L93 Difference]: Finished difference Result 6173 states and 21367 transitions. [2021-05-03 15:29:48,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 15:29:48,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 [2021-05-03 15:29:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:48,651 INFO L225 Difference]: With dead ends: 6173 [2021-05-03 15:29:48,651 INFO L226 Difference]: Without dead ends: 3187 [2021-05-03 15:29:48,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 415.4ms TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 15:29:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-05-03 15:29:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1397. [2021-05-03 15:29:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 3.4978510028653296) internal successors, (4883), 1396 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4883 transitions. [2021-05-03 15:29:48,695 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4883 transitions. Word has length 25 [2021-05-03 15:29:48,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:48,695 INFO L480 AbstractCegarLoop]: Abstraction has 1397 states and 4883 transitions. [2021-05-03 15:29:48,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2021-05-03 15:29:48,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4883 transitions. [2021-05-03 15:29:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:29:48,698 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:48,698 INFO L551 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] [2021-05-03 15:29:48,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:48,915 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:48,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:48,916 INFO L82 PathProgramCache]: Analyzing trace with hash 566728726, now seen corresponding path program 2 times [2021-05-03 15:29:48,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:48,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176933920] [2021-05-03 15:29:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:48,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176933920] [2021-05-03 15:29:48,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:29:48,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:29:48,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198719061] [2021-05-03 15:29:48,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:29:48,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:48,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:29:48,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:29:48,938 INFO L87 Difference]: Start difference. First operand 1397 states and 4883 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:48,972 INFO L93 Difference]: Finished difference Result 1523 states and 5204 transitions. [2021-05-03 15:29:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:29:48,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:29:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:48,976 INFO L225 Difference]: With dead ends: 1523 [2021-05-03 15:29:48,976 INFO L226 Difference]: Without dead ends: 1424 [2021-05-03 15:29:48,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:29:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-05-03 15:29:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1302. [2021-05-03 15:29:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.504227517294389) internal successors, (4559), 1301 states have internal predecessors, (4559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4559 transitions. [2021-05-03 15:29:48,999 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4559 transitions. Word has length 25 [2021-05-03 15:29:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:48,999 INFO L480 AbstractCegarLoop]: Abstraction has 1302 states and 4559 transitions. [2021-05-03 15:29:48,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4559 transitions. [2021-05-03 15:29:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:29:49,003 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:49,003 INFO L551 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] [2021-05-03 15:29:49,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 15:29:49,003 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:49,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1313441110, now seen corresponding path program 3 times [2021-05-03 15:29:49,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:49,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008241616] [2021-05-03 15:29:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:49,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008241616] [2021-05-03 15:29:49,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704057781] [2021-05-03 15:29:49,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:49,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:29:49,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:49,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 15:29:49,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:49,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:49,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-03 15:29:49,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176503815] [2021-05-03 15:29:49,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:29:49,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:29:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:29:49,100 INFO L87 Difference]: Start difference. First operand 1302 states and 4559 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:49,137 INFO L93 Difference]: Finished difference Result 1384 states and 4841 transitions. [2021-05-03 15:29:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:29:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 15:29:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:49,140 INFO L225 Difference]: With dead ends: 1384 [2021-05-03 15:29:49,140 INFO L226 Difference]: Without dead ends: 1282 [2021-05-03 15:29:49,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:29:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-05-03 15:29:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1044. [2021-05-03 15:29:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5167785234899327) internal successors, (3668), 1043 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3668 transitions. [2021-05-03 15:29:49,159 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3668 transitions. Word has length 25 [2021-05-03 15:29:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:49,159 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 3668 transitions. [2021-05-03 15:29:49,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3668 transitions. [2021-05-03 15:29:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:29:49,178 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:49,178 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:29:49,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 15:29:49,393 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:49,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:49,393 INFO L82 PathProgramCache]: Analyzing trace with hash -873778054, now seen corresponding path program 1 times [2021-05-03 15:29:49,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:49,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157091854] [2021-05-03 15:29:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:49,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157091854] [2021-05-03 15:29:49,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916855923] [2021-05-03 15:29:49,529 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) [2021-05-03 15:29:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:49,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:49,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:49,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-05-03 15:29:49,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:49,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:29:49,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:29:49,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-05-03 15:29:49,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 15:29:49,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:49,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:29:49,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:29:49,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-05-03 15:29:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:49,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:49,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 15:29:49,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523070469] [2021-05-03 15:29:49,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:29:49,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:49,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:29:49,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:29:49,692 INFO L87 Difference]: Start difference. First operand 1044 states and 3668 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:49,871 INFO L93 Difference]: Finished difference Result 2466 states and 8751 transitions. [2021-05-03 15:29:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:29:49,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:29:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:49,875 INFO L225 Difference]: With dead ends: 2466 [2021-05-03 15:29:49,875 INFO L226 Difference]: Without dead ends: 1631 [2021-05-03 15:29:49,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:29:49,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-05-03 15:29:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1283. [2021-05-03 15:29:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.4672386895475817) internal successors, (4445), 1282 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4445 transitions. [2021-05-03 15:29:49,904 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4445 transitions. Word has length 29 [2021-05-03 15:29:49,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:49,905 INFO L480 AbstractCegarLoop]: Abstraction has 1283 states and 4445 transitions. [2021-05-03 15:29:49,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:49,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4445 transitions. [2021-05-03 15:29:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:29:49,914 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:49,914 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:29:50,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:50,129 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:50,129 INFO L82 PathProgramCache]: Analyzing trace with hash -22453128, now seen corresponding path program 2 times [2021-05-03 15:29:50,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:50,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015701100] [2021-05-03 15:29:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:50,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015701100] [2021-05-03 15:29:50,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52119] [2021-05-03 15:29:50,210 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 [2021-05-03 15:29:50,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:29:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 15:29:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:50,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 7 [2021-05-03 15:29:50,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:50,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:29:50,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:29:50,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:7 [2021-05-03 15:29:50,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:29:50,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:50,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:29:50,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:29:50,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-05-03 15:29:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:50,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:50,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 15:29:50,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890130411] [2021-05-03 15:29:50,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:29:50,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:50,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:29:50,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:29:50,343 INFO L87 Difference]: Start difference. First operand 1283 states and 4445 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:50,604 INFO L93 Difference]: Finished difference Result 2852 states and 10126 transitions. [2021-05-03 15:29:50,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:29:50,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:29:50,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:50,607 INFO L225 Difference]: With dead ends: 2852 [2021-05-03 15:29:50,607 INFO L226 Difference]: Without dead ends: 1150 [2021-05-03 15:29:50,608 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:29:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-05-03 15:29:50,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 753. [2021-05-03 15:29:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.466755319148936) internal successors, (2607), 752 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2607 transitions. [2021-05-03 15:29:50,621 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2607 transitions. Word has length 29 [2021-05-03 15:29:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:50,621 INFO L480 AbstractCegarLoop]: Abstraction has 753 states and 2607 transitions. [2021-05-03 15:29:50,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2607 transitions. [2021-05-03 15:29:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:29:50,623 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:50,623 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:29:50,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-03 15:29:50,837 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:50,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1929474972, now seen corresponding path program 3 times [2021-05-03 15:29:50,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:50,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467531849] [2021-05-03 15:29:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:29:50,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467531849] [2021-05-03 15:29:50,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182306322] [2021-05-03 15:29:50,875 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 [2021-05-03 15:29:50,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:29:50,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:50,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 15:29:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:29:51,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:51,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 15:29:51,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262192003] [2021-05-03 15:29:51,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:29:51,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:51,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:29:51,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:29:51,004 INFO L87 Difference]: Start difference. First operand 753 states and 2607 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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) [2021-05-03 15:29:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:51,378 INFO L93 Difference]: Finished difference Result 2449 states and 8696 transitions. [2021-05-03 15:29:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:29:51,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 31 [2021-05-03 15:29:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:51,383 INFO L225 Difference]: With dead ends: 2449 [2021-05-03 15:29:51,383 INFO L226 Difference]: Without dead ends: 2435 [2021-05-03 15:29:51,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 197.0ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:29:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-05-03 15:29:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1458. [2021-05-03 15:29:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.723404255319149) internal successors, (5425), 1457 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5425 transitions. [2021-05-03 15:29:51,412 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5425 transitions. Word has length 31 [2021-05-03 15:29:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:51,413 INFO L480 AbstractCegarLoop]: Abstraction has 1458 states and 5425 transitions. [2021-05-03 15:29:51,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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) [2021-05-03 15:29:51,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5425 transitions. [2021-05-03 15:29:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:29:51,415 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:51,415 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:29:51,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:51,629 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:51,629 INFO L82 PathProgramCache]: Analyzing trace with hash 215625022, now seen corresponding path program 4 times [2021-05-03 15:29:51,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:51,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163933184] [2021-05-03 15:29:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:29:51,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163933184] [2021-05-03 15:29:51,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92302879] [2021-05-03 15:29:51,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:29:51,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:29:51,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:51,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:29:51,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 15:29:51,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:51,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 15:29:51,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455847715] [2021-05-03 15:29:51,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:29:51,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:51,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:29:51,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:29:51,727 INFO L87 Difference]: Start difference. First operand 1458 states and 5425 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:51,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:51,780 INFO L93 Difference]: Finished difference Result 3104 states and 11373 transitions. [2021-05-03 15:29:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:29:51,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:29:51,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:51,787 INFO L225 Difference]: With dead ends: 3104 [2021-05-03 15:29:51,787 INFO L226 Difference]: Without dead ends: 3100 [2021-05-03 15:29:51,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:29:51,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-05-03 15:29:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1644. [2021-05-03 15:29:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 3.837492391965916) internal successors, (6305), 1643 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 6305 transitions. [2021-05-03 15:29:51,822 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 6305 transitions. Word has length 33 [2021-05-03 15:29:51,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:51,822 INFO L480 AbstractCegarLoop]: Abstraction has 1644 states and 6305 transitions. [2021-05-03 15:29:51,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:51,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 6305 transitions. [2021-05-03 15:29:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:29:51,826 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:51,826 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:29:52,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 15:29:52,041 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:52,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1617454150, now seen corresponding path program 5 times [2021-05-03 15:29:52,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:52,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190207624] [2021-05-03 15:29:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:29:52,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190207624] [2021-05-03 15:29:52,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549476999] [2021-05-03 15:29:52,065 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 [2021-05-03 15:29:52,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:29:52,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:52,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:29:52,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:29:52,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:52,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 15:29:52,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732440823] [2021-05-03 15:29:52,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:29:52,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:52,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:29:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:29:52,182 INFO L87 Difference]: Start difference. First operand 1644 states and 6305 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:52,243 INFO L93 Difference]: Finished difference Result 3039 states and 11040 transitions. [2021-05-03 15:29:52,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:29:52,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:29:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:52,249 INFO L225 Difference]: With dead ends: 3039 [2021-05-03 15:29:52,249 INFO L226 Difference]: Without dead ends: 3039 [2021-05-03 15:29:52,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:29:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-05-03 15:29:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1619. [2021-05-03 15:29:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.857849196538937) internal successors, (6242), 1618 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 6242 transitions. [2021-05-03 15:29:52,282 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 6242 transitions. Word has length 33 [2021-05-03 15:29:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:52,282 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 6242 transitions. [2021-05-03 15:29:52,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 6242 transitions. [2021-05-03 15:29:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:29:52,286 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:52,286 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:29:52,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 15:29:52,504 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:52,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:52,504 INFO L82 PathProgramCache]: Analyzing trace with hash -461930502, now seen corresponding path program 6 times [2021-05-03 15:29:52,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:52,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183445766] [2021-05-03 15:29:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:29:52,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183445766] [2021-05-03 15:29:52,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93038883] [2021-05-03 15:29:52,526 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 [2021-05-03 15:29:52,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:29:52,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:52,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 15:29:52,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:29:52,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:52,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 15:29:52,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489647649] [2021-05-03 15:29:52,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:29:52,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:29:52,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:29:52,621 INFO L87 Difference]: Start difference. First operand 1619 states and 6242 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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) [2021-05-03 15:29:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:53,174 INFO L93 Difference]: Finished difference Result 7858 states and 29355 transitions. [2021-05-03 15:29:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 15:29:53,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 33 [2021-05-03 15:29:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:53,188 INFO L225 Difference]: With dead ends: 7858 [2021-05-03 15:29:53,188 INFO L226 Difference]: Without dead ends: 7378 [2021-05-03 15:29:53,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=419, Invalid=1473, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:29:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-05-03 15:29:53,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 3747. [2021-05-03 15:29:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 4.203150026695141) internal successors, (15745), 3746 states have internal predecessors, (15745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 15745 transitions. [2021-05-03 15:29:53,283 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 15745 transitions. Word has length 33 [2021-05-03 15:29:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:53,283 INFO L480 AbstractCegarLoop]: Abstraction has 3747 states and 15745 transitions. [2021-05-03 15:29:53,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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) [2021-05-03 15:29:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 15745 transitions. [2021-05-03 15:29:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:29:53,291 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:53,291 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:29:53,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 15:29:53,508 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:53,509 INFO L82 PathProgramCache]: Analyzing trace with hash 685612088, now seen corresponding path program 7 times [2021-05-03 15:29:53,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:53,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729269602] [2021-05-03 15:29:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:29:53,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729269602] [2021-05-03 15:29:53,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577952187] [2021-05-03 15:29:53,542 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 [2021-05-03 15:29:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:53,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:29:53,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 15:29:53,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:53,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 15:29:53,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542273848] [2021-05-03 15:29:53,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:29:53,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:53,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:29:53,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:29:53,642 INFO L87 Difference]: Start difference. First operand 3747 states and 15745 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:53,714 INFO L93 Difference]: Finished difference Result 5515 states and 21821 transitions. [2021-05-03 15:29:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:29:53,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:29:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:53,724 INFO L225 Difference]: With dead ends: 5515 [2021-05-03 15:29:53,724 INFO L226 Difference]: Without dead ends: 5515 [2021-05-03 15:29:53,724 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:29:53,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2021-05-03 15:29:53,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 3848. [2021-05-03 15:29:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3847 states have (on average 4.193137509747856) internal successors, (16131), 3847 states have internal predecessors, (16131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 16131 transitions. [2021-05-03 15:29:53,826 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 16131 transitions. Word has length 33 [2021-05-03 15:29:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:53,826 INFO L480 AbstractCegarLoop]: Abstraction has 3848 states and 16131 transitions. [2021-05-03 15:29:53,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:53,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 16131 transitions. [2021-05-03 15:29:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:29:53,837 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:53,837 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:29:54,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 15:29:54,054 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:54,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1338680964, now seen corresponding path program 8 times [2021-05-03 15:29:54,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:54,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023492001] [2021-05-03 15:29:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:29:54,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023492001] [2021-05-03 15:29:54,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260354196] [2021-05-03 15:29:54,086 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) [2021-05-03 15:29:54,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:29:54,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:54,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:29:54,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:29:54,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:54,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 15:29:54,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113037437] [2021-05-03 15:29:54,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:29:54,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:54,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:29:54,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:29:54,179 INFO L87 Difference]: Start difference. First operand 3848 states and 16131 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:54,264 INFO L93 Difference]: Finished difference Result 5599 states and 22264 transitions. [2021-05-03 15:29:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:29:54,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:29:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:54,275 INFO L225 Difference]: With dead ends: 5599 [2021-05-03 15:29:54,275 INFO L226 Difference]: Without dead ends: 5599 [2021-05-03 15:29:54,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:29:54,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2021-05-03 15:29:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 4158. [2021-05-03 15:29:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4157 states have (on average 4.1554005292278084) internal successors, (17274), 4157 states have internal predecessors, (17274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 17274 transitions. [2021-05-03 15:29:54,351 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 17274 transitions. Word has length 33 [2021-05-03 15:29:54,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:54,351 INFO L480 AbstractCegarLoop]: Abstraction has 4158 states and 17274 transitions. [2021-05-03 15:29:54,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:54,351 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 17274 transitions. [2021-05-03 15:29:54,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:29:54,359 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:54,359 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:29:54,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 15:29:54,573 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1085770464, now seen corresponding path program 9 times [2021-05-03 15:29:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:54,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719410245] [2021-05-03 15:29:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:29:54,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719410245] [2021-05-03 15:29:54,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113136886] [2021-05-03 15:29:54,691 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) [2021-05-03 15:29:54,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:29:54,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:54,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:54,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:54,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:29:54,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-05-03 15:29:54,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:54,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-05-03 15:29:54,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:54,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:29:54,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 15:29:54,832 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-05-03 15:29:54,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-05-03 15:29:54,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:54,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:29:54,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-05-03 15:29:54,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:54,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:29:54,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 15:29:54,932 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:43 [2021-05-03 15:29:55,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 15:29:55,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:55,158 INFO L628 ElimStorePlain]: treesize reduction 27, result has 55.0 percent of original size [2021-05-03 15:29:55,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 15:29:55,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:55,165 INFO L628 ElimStorePlain]: treesize reduction 6, result has 45.5 percent of original size [2021-05-03 15:29:55,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:29:55,166 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:5 [2021-05-03 15:29:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:55,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:55,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 17 [2021-05-03 15:29:55,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684655839] [2021-05-03 15:29:55,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:29:55,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:55,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:29:55,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:29:55,217 INFO L87 Difference]: Start difference. First operand 4158 states and 17274 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 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) [2021-05-03 15:29:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:56,143 INFO L93 Difference]: Finished difference Result 9317 states and 38403 transitions. [2021-05-03 15:29:56,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:29:56,145 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 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 35 [2021-05-03 15:29:56,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:56,153 INFO L225 Difference]: With dead ends: 9317 [2021-05-03 15:29:56,153 INFO L226 Difference]: Without dead ends: 4302 [2021-05-03 15:29:56,154 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 609.9ms TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:29:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-05-03 15:29:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 4250. [2021-05-03 15:29:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 4.120498940927277) internal successors, (17508), 4249 states have internal predecessors, (17508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 17508 transitions. [2021-05-03 15:29:56,226 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 17508 transitions. Word has length 35 [2021-05-03 15:29:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:56,226 INFO L480 AbstractCegarLoop]: Abstraction has 4250 states and 17508 transitions. [2021-05-03 15:29:56,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 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) [2021-05-03 15:29:56,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 17508 transitions. [2021-05-03 15:29:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:29:56,234 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:56,234 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:29:56,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:56,449 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:56,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:56,449 INFO L82 PathProgramCache]: Analyzing trace with hash -436856958, now seen corresponding path program 10 times [2021-05-03 15:29:56,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:56,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006603008] [2021-05-03 15:29:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:29:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006603008] [2021-05-03 15:29:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941085684] [2021-05-03 15:29:56,579 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 [2021-05-03 15:29:56,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:29:56,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:56,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 15:29:56,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:56,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:29:56,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-05-03 15:29:56,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:56,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-05-03 15:29:56,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:56,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:29:56,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 15:29:56,749 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:53, output treesize:39 [2021-05-03 15:29:56,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 15:29:56,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:56,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 15:29:56,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:29:56,918 INFO L628 ElimStorePlain]: treesize reduction 23, result has 11.5 percent of original size [2021-05-03 15:29:56,918 INFO L518 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2021-05-03 15:29:56,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:29:56,918 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:3 [2021-05-03 15:29:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:56,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:56,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-05-03 15:29:56,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100208533] [2021-05-03 15:29:56,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:29:56,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:56,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:29:56,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:29:56,932 INFO L87 Difference]: Start difference. First operand 4250 states and 17508 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2021-05-03 15:29:57,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:57,530 INFO L93 Difference]: Finished difference Result 9382 states and 37522 transitions. [2021-05-03 15:29:57,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:29:57,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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 35 [2021-05-03 15:29:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:57,539 INFO L225 Difference]: With dead ends: 9382 [2021-05-03 15:29:57,539 INFO L226 Difference]: Without dead ends: 4508 [2021-05-03 15:29:57,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:29:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2021-05-03 15:29:57,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4326. [2021-05-03 15:29:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4325 states have (on average 4.0920231213872835) internal successors, (17698), 4325 states have internal predecessors, (17698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 17698 transitions. [2021-05-03 15:29:57,604 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 17698 transitions. Word has length 35 [2021-05-03 15:29:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:57,604 INFO L480 AbstractCegarLoop]: Abstraction has 4326 states and 17698 transitions. [2021-05-03 15:29:57,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2021-05-03 15:29:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 17698 transitions. [2021-05-03 15:29:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 15:29:57,612 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:57,612 INFO L551 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, 1, 1] [2021-05-03 15:29:57,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 15:29:57,827 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:57,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:57,827 INFO L82 PathProgramCache]: Analyzing trace with hash 804357182, now seen corresponding path program 11 times [2021-05-03 15:29:57,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:57,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961489123] [2021-05-03 15:29:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 15:29:57,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961489123] [2021-05-03 15:29:57,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381727811] [2021-05-03 15:29:57,873 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 [2021-05-03 15:29:57,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:29:57,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:57,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:29:57,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 15:29:57,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:57,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 15:29:57,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567556398] [2021-05-03 15:29:57,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:29:57,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:57,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:29:57,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:29:57,946 INFO L87 Difference]: Start difference. First operand 4326 states and 17698 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:58,028 INFO L93 Difference]: Finished difference Result 6092 states and 23684 transitions. [2021-05-03 15:29:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:29:58,028 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:29:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:58,040 INFO L225 Difference]: With dead ends: 6092 [2021-05-03 15:29:58,041 INFO L226 Difference]: Without dead ends: 6080 [2021-05-03 15:29:58,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:29:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6080 states. [2021-05-03 15:29:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6080 to 4576. [2021-05-03 15:29:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.078032786885246) internal successors, (18657), 4575 states have internal predecessors, (18657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 18657 transitions. [2021-05-03 15:29:58,131 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 18657 transitions. Word has length 37 [2021-05-03 15:29:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:58,132 INFO L480 AbstractCegarLoop]: Abstraction has 4576 states and 18657 transitions. [2021-05-03 15:29:58,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 18657 transitions. [2021-05-03 15:29:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 15:29:58,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:58,140 INFO L551 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, 1, 1] [2021-05-03 15:29:58,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:58,356 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash 550256378, now seen corresponding path program 12 times [2021-05-03 15:29:58,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:58,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523299286] [2021-05-03 15:29:58,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:29:58,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523299286] [2021-05-03 15:29:58,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63005595] [2021-05-03 15:29:58,383 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 [2021-05-03 15:29:58,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:29:58,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:29:58,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 15:29:58,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:58,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 15:29:58,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148318724] [2021-05-03 15:29:58,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:29:58,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:29:58,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:29:58,486 INFO L87 Difference]: Start difference. First operand 4576 states and 18657 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:58,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:58,582 INFO L93 Difference]: Finished difference Result 9156 states and 35918 transitions. [2021-05-03 15:29:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:29:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:29:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:58,602 INFO L225 Difference]: With dead ends: 9156 [2021-05-03 15:29:58,603 INFO L226 Difference]: Without dead ends: 9136 [2021-05-03 15:29:58,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:29:58,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2021-05-03 15:29:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 5812. [2021-05-03 15:29:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 4.22715539494063) internal successors, (24564), 5811 states have internal predecessors, (24564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 24564 transitions. [2021-05-03 15:29:58,725 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 24564 transitions. Word has length 37 [2021-05-03 15:29:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:58,725 INFO L480 AbstractCegarLoop]: Abstraction has 5812 states and 24564 transitions. [2021-05-03 15:29:58,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 24564 transitions. [2021-05-03 15:29:58,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 15:29:58,737 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:58,737 INFO L551 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, 1, 1] [2021-05-03 15:29:58,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 15:29:58,952 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1282822794, now seen corresponding path program 13 times [2021-05-03 15:29:58,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:58,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266886680] [2021-05-03 15:29:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 15:29:58,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266886680] [2021-05-03 15:29:58,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682160225] [2021-05-03 15:29:58,974 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 [2021-05-03 15:29:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:59,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:29:59,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 15:29:59,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:59,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 15:29:59,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567077875] [2021-05-03 15:29:59,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:29:59,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:59,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:29:59,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:29:59,053 INFO L87 Difference]: Start difference. First operand 5812 states and 24564 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:59,147 INFO L93 Difference]: Finished difference Result 9442 states and 37337 transitions. [2021-05-03 15:29:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:29:59,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:29:59,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:59,165 INFO L225 Difference]: With dead ends: 9442 [2021-05-03 15:29:59,166 INFO L226 Difference]: Without dead ends: 9442 [2021-05-03 15:29:59,166 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:29:59,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9442 states. [2021-05-03 15:29:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9442 to 5125. [2021-05-03 15:29:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5124 states have (on average 4.132708821233411) internal successors, (21176), 5124 states have internal predecessors, (21176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 21176 transitions. [2021-05-03 15:29:59,270 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 21176 transitions. Word has length 37 [2021-05-03 15:29:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:59,270 INFO L480 AbstractCegarLoop]: Abstraction has 5125 states and 21176 transitions. [2021-05-03 15:29:59,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:59,270 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 21176 transitions. [2021-05-03 15:29:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 15:29:59,279 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:59,279 INFO L551 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, 1, 1] [2021-05-03 15:29:59,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:59,479 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:59,479 INFO L82 PathProgramCache]: Analyzing trace with hash 987851450, now seen corresponding path program 14 times [2021-05-03 15:29:59,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:59,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142399082] [2021-05-03 15:29:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:29:59,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142399082] [2021-05-03 15:29:59,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195276058] [2021-05-03 15:29:59,513 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 [2021-05-03 15:29:59,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:29:59,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:29:59,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:29:59,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:29:59,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:59,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 15:29:59,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639511860] [2021-05-03 15:29:59,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:29:59,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:59,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:29:59,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:29:59,631 INFO L87 Difference]: Start difference. First operand 5125 states and 21176 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:29:59,755 INFO L93 Difference]: Finished difference Result 8511 states and 32921 transitions. [2021-05-03 15:29:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:29:59,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:29:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:29:59,770 INFO L225 Difference]: With dead ends: 8511 [2021-05-03 15:29:59,771 INFO L226 Difference]: Without dead ends: 8511 [2021-05-03 15:29:59,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:29:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8511 states. [2021-05-03 15:29:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8511 to 4053. [2021-05-03 15:29:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 4.028874629812439) internal successors, (16325), 4052 states have internal predecessors, (16325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 16325 transitions. [2021-05-03 15:29:59,857 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 16325 transitions. Word has length 37 [2021-05-03 15:29:59,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:59,857 INFO L480 AbstractCegarLoop]: Abstraction has 4053 states and 16325 transitions. [2021-05-03 15:29:59,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 16325 transitions. [2021-05-03 15:29:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 15:29:59,864 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:59,864 INFO L551 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, 1, 1] [2021-05-03 15:30:00,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 15:30:00,065 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:30:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:30:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1447205570, now seen corresponding path program 15 times [2021-05-03 15:30:00,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:30:00,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149942007] [2021-05-03 15:30:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:30:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:30:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:30:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149942007] [2021-05-03 15:30:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924740524] [2021-05-03 15:30:00,105 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 [2021-05-03 15:30:00,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:30:00,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:30:00,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:30:00,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:30:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:30:00,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:30:00,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-03 15:30:00,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985031133] [2021-05-03 15:30:00,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:30:00,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:30:00,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:30:00,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:30:00,235 INFO L87 Difference]: Start difference. First operand 4053 states and 16325 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) [2021-05-03 15:30:01,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:30:01,171 INFO L93 Difference]: Finished difference Result 11628 states and 44736 transitions. [2021-05-03 15:30:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 15:30:01,171 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 [2021-05-03 15:30:01,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:30:01,193 INFO L225 Difference]: With dead ends: 11628 [2021-05-03 15:30:01,194 INFO L226 Difference]: Without dead ends: 11024 [2021-05-03 15:30:01,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 577.0ms TimeCoverageRelationStatistics Valid=1036, Invalid=3520, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 15:30:01,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11024 states. [2021-05-03 15:30:01,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11024 to 5085. [2021-05-03 15:30:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 5084 states have (on average 4.030881195908734) internal successors, (20493), 5084 states have internal predecessors, (20493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:30:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 20493 transitions. [2021-05-03 15:30:01,328 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 20493 transitions. Word has length 37 [2021-05-03 15:30:01,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:30:01,328 INFO L480 AbstractCegarLoop]: Abstraction has 5085 states and 20493 transitions. [2021-05-03 15:30:01,328 INFO L481 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) [2021-05-03 15:30:01,328 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 20493 transitions. [2021-05-03 15:30:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:30:01,337 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:30:01,337 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-03 15:30:01,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-03 15:30:01,538 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:30:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:30:01,538 INFO L82 PathProgramCache]: Analyzing trace with hash -2010083624, now seen corresponding path program 16 times [2021-05-03 15:30:01,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:30:01,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887101283] [2021-05-03 15:30:01,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:30:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:30:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 15:30:01,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887101283] [2021-05-03 15:30:01,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482696030] [2021-05-03 15:30:01,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 15:30:01,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:30:01,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:30:01,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:30:01,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:30:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 15:30:01,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:30:01,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 15:30:01,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801140326] [2021-05-03 15:30:01,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:30:01,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:30:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:30:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:30:01,722 INFO L87 Difference]: Start difference. First operand 5085 states and 20493 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:30:01,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:30:01,862 INFO L93 Difference]: Finished difference Result 12069 states and 47387 transitions. [2021-05-03 15:30:01,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:30:01,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:30:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:30:01,888 INFO L225 Difference]: With dead ends: 12069 [2021-05-03 15:30:01,888 INFO L226 Difference]: Without dead ends: 12069 [2021-05-03 15:30:01,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:30:01,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12069 states. [2021-05-03 15:30:02,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12069 to 8160. [2021-05-03 15:30:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 8159 states have (on average 4.160804020100502) internal successors, (33948), 8159 states have internal predecessors, (33948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:30:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 33948 transitions. [2021-05-03 15:30:02,050 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 33948 transitions. Word has length 39 [2021-05-03 15:30:02,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:30:02,050 INFO L480 AbstractCegarLoop]: Abstraction has 8160 states and 33948 transitions. [2021-05-03 15:30:02,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:30:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 33948 transitions. [2021-05-03 15:30:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 15:30:02,064 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:30:02,064 INFO L551 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, 1, 1] [2021-05-03 15:30:02,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 15:30:02,264 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:30:02,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:30:02,265 INFO L82 PathProgramCache]: Analyzing trace with hash -657746618, now seen corresponding path program 17 times [2021-05-03 15:30:02,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:30:02,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949110886] [2021-05-03 15:30:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:30:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:30:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-03 15:30:02,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949110886] [2021-05-03 15:30:02,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979710488] [2021-05-03 15:30:02,297 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 [2021-05-03 15:30:02,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:30:02,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:30:02,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:30:02,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:30:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 15:30:02,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:30:02,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-03 15:30:02,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906663539] [2021-05-03 15:30:02,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:30:02,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:30:02,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:30:02,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:30:02,488 INFO L87 Difference]: Start difference. First operand 8160 states and 33948 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) [2021-05-03 15:30:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:30:03,640 INFO L93 Difference]: Finished difference Result 26614 states and 103468 transitions. [2021-05-03 15:30:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 15:30:03,640 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 41 [2021-05-03 15:30:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:30:03,703 INFO L225 Difference]: With dead ends: 26614 [2021-05-03 15:30:03,703 INFO L226 Difference]: Without dead ends: 25436 [2021-05-03 15:30:03,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 696.7ms TimeCoverageRelationStatistics Valid=1482, Invalid=5658, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 15:30:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25436 states. [2021-05-03 15:30:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25436 to 15198. [2021-05-03 15:30:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15198 states, 15197 states have (on average 4.284727248799105) internal successors, (65115), 15197 states have internal predecessors, (65115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:30:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15198 states to 15198 states and 65115 transitions. [2021-05-03 15:30:04,172 INFO L78 Accepts]: Start accepts. Automaton has 15198 states and 65115 transitions. Word has length 41 [2021-05-03 15:30:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:30:04,172 INFO L480 AbstractCegarLoop]: Abstraction has 15198 states and 65115 transitions. [2021-05-03 15:30:04,172 INFO L481 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) [2021-05-03 15:30:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 15198 states and 65115 transitions. [2021-05-03 15:30:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 15:30:04,201 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:30:04,201 INFO L551 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, 1, 1] [2021-05-03 15:30:04,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 15:30:04,401 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:30:04,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:30:04,401 INFO L82 PathProgramCache]: Analyzing trace with hash -869101180, now seen corresponding path program 18 times [2021-05-03 15:30:04,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:30:04,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199779450] [2021-05-03 15:30:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:30:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:30:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 15:30:04,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199779450] [2021-05-03 15:30:04,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725546943] [2021-05-03 15:30:04,434 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 [2021-05-03 15:30:04,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 15:30:04,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:30:04,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:30:04,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:30:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-03 15:30:04,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:30:04,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-03 15:30:04,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518860341] [2021-05-03 15:30:04,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:30:04,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:30:04,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:30:04,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:30:04,542 INFO L87 Difference]: Start difference. First operand 15198 states and 65115 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 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) [2021-05-03 15:30:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:30:05,573 INFO L93 Difference]: Finished difference Result 62455 states and 251410 transitions. [2021-05-03 15:30:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 15:30:05,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 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 41 [2021-05-03 15:30:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:30:05,918 INFO L225 Difference]: With dead ends: 62455 [2021-05-03 15:30:05,918 INFO L226 Difference]: Without dead ends: 62455 [2021-05-03 15:30:05,919 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=568, Invalid=1502, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:30:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62455 states. [2021-05-03 15:30:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62455 to 31961. [2021-05-03 15:30:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31961 states, 31960 states have (on average 4.464518147684606) internal successors, (142686), 31960 states have internal predecessors, (142686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:30:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31961 states to 31961 states and 142686 transitions. [2021-05-03 15:30:07,257 INFO L78 Accepts]: Start accepts. Automaton has 31961 states and 142686 transitions. Word has length 41 [2021-05-03 15:30:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:30:07,257 INFO L480 AbstractCegarLoop]: Abstraction has 31961 states and 142686 transitions. [2021-05-03 15:30:07,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 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) [2021-05-03 15:30:07,257 INFO L276 IsEmpty]: Start isEmpty. Operand 31961 states and 142686 transitions. [2021-05-03 15:30:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 15:30:07,331 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:30:07,331 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:30:07,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:30:07,545 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:30:07,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:30:07,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1576576382, now seen corresponding path program 19 times [2021-05-03 15:30:07,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:30:07,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184611605] [2021-05-03 15:30:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:30:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:30:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:30:07,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184611605] [2021-05-03 15:30:07,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124331853] [2021-05-03 15:30:07,959 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 [2021-05-03 15:30:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:30:07,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 15:30:07,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:30:08,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-05-03 15:30:08,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:30:08,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:30:08,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:30:08,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-05-03 15:30:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,265 INFO L354 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2021-05-03 15:30:08,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 38 [2021-05-03 15:30:08,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:30:08,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,295 INFO L354 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2021-05-03 15:30:08,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 38 [2021-05-03 15:30:08,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 15:30:08,373 INFO L628 ElimStorePlain]: treesize reduction 25, result has 77.7 percent of original size [2021-05-03 15:30:08,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-05-03 15:30:08,395 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:80 [2021-05-03 15:30:08,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-05-03 15:30:08,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:30:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,754 INFO L354 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2021-05-03 15:30:08,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 38 [2021-05-03 15:30:08,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:30:08,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,775 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 15:30:08,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2021-05-03 15:30:08,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:30:08,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2021-05-03 15:30:08,789 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:30:08,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:08,814 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-05-03 15:30:08,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 38 [2021-05-03 15:30:08,818 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-05-03 15:30:08,934 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-05-03 15:30:08,935 INFO L628 ElimStorePlain]: treesize reduction 25, result has 86.3 percent of original size [2021-05-03 15:30:08,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 5 xjuncts. [2021-05-03 15:30:08,951 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:172, output treesize:126 [2021-05-03 15:30:18,021 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_20, v_prenex_25, v_prenex_17], 10=[A]} [2021-05-03 15:30:18,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:30:18,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-05-03 15:30:18,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 15:30:18,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:30:18,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:18,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:30:18,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-05-03 15:30:18,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 15:30:18,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:30:18,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:30:18,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 39 [2021-05-03 15:30:18,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 15:30:18,389 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-05-03 15:30:18,390 INFO L628 ElimStorePlain]: treesize reduction 25, result has 87.0 percent of original size [2021-05-03 15:30:18,413 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 15:30:18,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-05-03 15:30:18,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:30:18,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:30:18,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:30:18,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 31 [2021-05-03 15:30:18,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:30:18,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:30:18,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-05-03 15:30:18,494 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-05-03 15:30:18,568 INFO L628 ElimStorePlain]: treesize reduction 31, result has 75.2 percent of original size [2021-05-03 15:30:18,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 15:30:18,579 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 14 variables, input treesize:159, output treesize:9 [2021-05-03 15:30:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 15:30:18,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:30:18,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-05-03 15:30:18,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613314146] [2021-05-03 15:30:18,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:30:18,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:30:18,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:30:18,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=328, Unknown=1, NotChecked=0, Total=420 [2021-05-03 15:30:18,595 INFO L87 Difference]: Start difference. First operand 31961 states and 142686 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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) [2021-05-03 15:30:44,979 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:31:07,422 WARN L205 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:31:17,904 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 15:31:59,053 WARN L205 SmtUtils]: Spent 14.13 s on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-05-03 15:32:01,247 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-05-03 15:32:19,528 WARN L205 SmtUtils]: Spent 18.15 s on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-05-03 15:32:38,074 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-05-03 15:32:48,379 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2021-05-03 15:32:56,976 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-05-03 15:32:57,587 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-05-03 15:33:14,184 WARN L205 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-05-03 15:33:17,295 WARN L205 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2021-05-03 15:33:39,300 WARN L205 SmtUtils]: Spent 13.00 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-05-03 15:33:39,894 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-05-03 15:34:00,246 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-05-03 15:34:06,496 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-05-03 15:34:06,690 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2021-05-03 15:34:09,401 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-05-03 15:34:09,738 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-05-03 15:34:34,868 WARN L205 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-05-03 15:34:40,155 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2021-05-03 15:34:42,906 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-05-03 15:34:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:34:52,069 INFO L93 Difference]: Finished difference Result 71243 states and 312845 transitions. [2021-05-03 15:34:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 15:34:52,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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 41 [2021-05-03 15:34:52,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:34:52,166 INFO L225 Difference]: With dead ends: 71243 [2021-05-03 15:34:52,166 INFO L226 Difference]: Without dead ends: 24194 [2021-05-03 15:34:52,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 196367.9ms TimeCoverageRelationStatistics Valid=895, Invalid=3088, Unknown=49, NotChecked=0, Total=4032 [2021-05-03 15:34:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24194 states. [2021-05-03 15:34:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24194 to 24194. [2021-05-03 15:34:52,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24194 states, 24193 states have (on average 4.4164014384326045) internal successors, (106846), 24193 states have internal predecessors, (106846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:34:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24194 states to 24194 states and 106846 transitions. [2021-05-03 15:34:53,025 INFO L78 Accepts]: Start accepts. Automaton has 24194 states and 106846 transitions. Word has length 41 [2021-05-03 15:34:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:34:53,025 INFO L480 AbstractCegarLoop]: Abstraction has 24194 states and 106846 transitions. [2021-05-03 15:34:53,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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) [2021-05-03 15:34:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 24194 states and 106846 transitions. [2021-05-03 15:34:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:34:53,110 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:34:53,110 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:34:53,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:34:53,317 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:34:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:34:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash 579617674, now seen corresponding path program 20 times [2021-05-03 15:34:53,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:34:53,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637668631] [2021-05-03 15:34:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:34:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:34:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 15:34:53,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637668631] [2021-05-03 15:34:53,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897525331] [2021-05-03 15:34:53,549 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 [2021-05-03 15:34:53,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:34:53,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:34:53,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 15:34:53,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:34:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 15:34:53,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:34:53,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 15:34:53,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964759017] [2021-05-03 15:34:53,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:34:53,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:34:53,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:34:53,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:34:53,639 INFO L87 Difference]: Start difference. First operand 24194 states and 106846 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:34:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:34:53,980 INFO L93 Difference]: Finished difference Result 31728 states and 133271 transitions. [2021-05-03 15:34:53,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:34:53,982 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:34:53,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:34:54,226 INFO L225 Difference]: With dead ends: 31728 [2021-05-03 15:34:54,227 INFO L226 Difference]: Without dead ends: 31708 [2021-05-03 15:34:54,227 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:34:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31708 states. [2021-05-03 15:34:54,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31708 to 20545. [2021-05-03 15:34:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 4.338492990654205) internal successors, (89130), 20544 states have internal predecessors, (89130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:34:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 89130 transitions. [2021-05-03 15:34:54,890 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 89130 transitions. Word has length 43 [2021-05-03 15:34:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:34:54,890 INFO L480 AbstractCegarLoop]: Abstraction has 20545 states and 89130 transitions. [2021-05-03 15:34:54,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:34:54,890 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 89130 transitions. [2021-05-03 15:34:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:34:54,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:34:54,943 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:34:55,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:34:55,145 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:34:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:34:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash 856538626, now seen corresponding path program 21 times [2021-05-03 15:34:55,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:34:55,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406804819] [2021-05-03 15:34:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:34:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:34:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-03 15:34:55,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406804819] [2021-05-03 15:34:55,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053327703] [2021-05-03 15:34:55,184 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 [2021-05-03 15:34:55,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 15:34:55,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:34:55,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 15:34:55,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:34:55,422 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-05-03 15:34:55,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 28 [2021-05-03 15:34:55,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:34:55,457 INFO L628 ElimStorePlain]: treesize reduction 15, result has 69.4 percent of original size [2021-05-03 15:34:55,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 15:34:55,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:34 [2021-05-03 15:34:55,669 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-03 15:34:55,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:34:55,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:34:55,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:34:55,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:34:55,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 15:34:55,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-05-03 15:34:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-05-03 15:34:55,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:34:55,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 17 [2021-05-03 15:34:55,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372732644] [2021-05-03 15:34:55,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:34:55,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:34:55,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:34:55,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:34:55,995 INFO L87 Difference]: Start difference. First operand 20545 states and 89130 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:35:05,172 INFO L93 Difference]: Finished difference Result 40925 states and 166727 transitions. [2021-05-03 15:35:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-03 15:35:05,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:35:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:35:05,343 INFO L225 Difference]: With dead ends: 40925 [2021-05-03 15:35:05,343 INFO L226 Difference]: Without dead ends: 40130 [2021-05-03 15:35:05,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 2924.6ms TimeCoverageRelationStatistics Valid=861, Invalid=6621, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 15:35:05,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40130 states. [2021-05-03 15:35:06,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40130 to 22541. [2021-05-03 15:35:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22541 states, 22540 states have (on average 4.351907719609583) internal successors, (98092), 22540 states have internal predecessors, (98092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22541 states to 22541 states and 98092 transitions. [2021-05-03 15:35:06,370 INFO L78 Accepts]: Start accepts. Automaton has 22541 states and 98092 transitions. Word has length 43 [2021-05-03 15:35:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:35:06,370 INFO L480 AbstractCegarLoop]: Abstraction has 22541 states and 98092 transitions. [2021-05-03 15:35:06,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 22541 states and 98092 transitions. [2021-05-03 15:35:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:35:06,427 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:35:06,427 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:35:06,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:35:06,629 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:35:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:35:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1826733498, now seen corresponding path program 22 times [2021-05-03 15:35:06,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:35:06,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474671039] [2021-05-03 15:35:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:35:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:35:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-03 15:35:06,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474671039] [2021-05-03 15:35:06,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554584827] [2021-05-03 15:35:06,671 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 [2021-05-03 15:35:06,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:35:06,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:35:06,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 15:35:06,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:35:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-03 15:35:06,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:35:06,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 15:35:06,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643108570] [2021-05-03 15:35:06,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:35:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:35:06,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:35:06,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:35:06,756 INFO L87 Difference]: Start difference. First operand 22541 states and 98092 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:35:07,255 INFO L93 Difference]: Finished difference Result 33069 states and 136975 transitions. [2021-05-03 15:35:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:35:07,256 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:35:07,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:35:07,375 INFO L225 Difference]: With dead ends: 33069 [2021-05-03 15:35:07,376 INFO L226 Difference]: Without dead ends: 33057 [2021-05-03 15:35:07,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:35:07,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33057 states. [2021-05-03 15:35:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33057 to 24124. [2021-05-03 15:35:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24124 states, 24123 states have (on average 4.382083488786635) internal successors, (105709), 24123 states have internal predecessors, (105709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24124 states to 24124 states and 105709 transitions. [2021-05-03 15:35:08,279 INFO L78 Accepts]: Start accepts. Automaton has 24124 states and 105709 transitions. Word has length 43 [2021-05-03 15:35:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:35:08,279 INFO L480 AbstractCegarLoop]: Abstraction has 24124 states and 105709 transitions. [2021-05-03 15:35:08,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:08,279 INFO L276 IsEmpty]: Start isEmpty. Operand 24124 states and 105709 transitions. [2021-05-03 15:35:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:35:08,335 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:35:08,335 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:35:08,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-05-03 15:35:08,552 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:35:08,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:35:08,552 INFO L82 PathProgramCache]: Analyzing trace with hash 733833666, now seen corresponding path program 23 times [2021-05-03 15:35:08,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:35:08,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127539539] [2021-05-03 15:35:08,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:35:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:35:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-03 15:35:08,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127539539] [2021-05-03 15:35:08,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827943811] [2021-05-03 15:35:08,593 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 [2021-05-03 15:35:08,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 15:35:08,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:35:08,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 15:35:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:35:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-03 15:35:08,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:35:08,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 15:35:08,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352504216] [2021-05-03 15:35:08,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:35:08,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:35:08,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:35:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:35:08,897 INFO L87 Difference]: Start difference. First operand 24124 states and 105709 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:35:09,218 INFO L93 Difference]: Finished difference Result 37208 states and 153811 transitions. [2021-05-03 15:35:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:35:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:35:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:35:09,501 INFO L225 Difference]: With dead ends: 37208 [2021-05-03 15:35:09,501 INFO L226 Difference]: Without dead ends: 37208 [2021-05-03 15:35:09,503 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:35:09,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37208 states. [2021-05-03 15:35:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37208 to 24238. [2021-05-03 15:35:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24238 states, 24237 states have (on average 4.37661426744234) internal successors, (106076), 24237 states have internal predecessors, (106076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24238 states to 24238 states and 106076 transitions. [2021-05-03 15:35:10,370 INFO L78 Accepts]: Start accepts. Automaton has 24238 states and 106076 transitions. Word has length 43 [2021-05-03 15:35:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:35:10,370 INFO L480 AbstractCegarLoop]: Abstraction has 24238 states and 106076 transitions. [2021-05-03 15:35:10,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 24238 states and 106076 transitions. [2021-05-03 15:35:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:35:10,444 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:35:10,444 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:35:10,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-05-03 15:35:10,645 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:35:10,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:35:10,646 INFO L82 PathProgramCache]: Analyzing trace with hash -545594268, now seen corresponding path program 24 times [2021-05-03 15:35:10,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:35:10,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528262837] [2021-05-03 15:35:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:35:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:35:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-03 15:35:10,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528262837] [2021-05-03 15:35:10,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932562853] [2021-05-03 15:35:10,846 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 [2021-05-03 15:35:10,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 15:35:10,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:35:10,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 15:35:10,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:35:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-03 15:35:10,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:35:10,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 15:35:10,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820507342] [2021-05-03 15:35:10,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:35:10,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:35:10,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:35:10,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:35:10,955 INFO L87 Difference]: Start difference. First operand 24238 states and 106076 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:35:11,531 INFO L93 Difference]: Finished difference Result 41576 states and 175210 transitions. [2021-05-03 15:35:11,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:35:11,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:35:11,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:35:11,726 INFO L225 Difference]: With dead ends: 41576 [2021-05-03 15:35:11,726 INFO L226 Difference]: Without dead ends: 41572 [2021-05-03 15:35:11,726 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:35:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41572 states. [2021-05-03 15:35:12,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41572 to 31284. [2021-05-03 15:35:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31284 states, 31283 states have (on average 4.461976153182239) internal successors, (139584), 31283 states have internal predecessors, (139584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31284 states to 31284 states and 139584 transitions. [2021-05-03 15:35:12,846 INFO L78 Accepts]: Start accepts. Automaton has 31284 states and 139584 transitions. Word has length 43 [2021-05-03 15:35:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:35:12,846 INFO L480 AbstractCegarLoop]: Abstraction has 31284 states and 139584 transitions. [2021-05-03 15:35:12,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 31284 states and 139584 transitions. [2021-05-03 15:35:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:35:12,934 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:35:12,935 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:35:13,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-03 15:35:13,135 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:35:13,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:35:13,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087200, now seen corresponding path program 25 times [2021-05-03 15:35:13,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:35:13,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635206618] [2021-05-03 15:35:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:35:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:35:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-03 15:35:13,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635206618] [2021-05-03 15:35:13,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187631644] [2021-05-03 15:35:13,175 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 [2021-05-03 15:35:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:35:13,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 15:35:13,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:35:13,493 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-05-03 15:35:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-03 15:35:13,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:35:13,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 15:35:13,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931789861] [2021-05-03 15:35:13,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:35:13,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:35:13,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:35:13,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:35:13,516 INFO L87 Difference]: Start difference. First operand 31284 states and 139584 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:14,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:35:14,023 INFO L93 Difference]: Finished difference Result 47435 states and 199052 transitions. [2021-05-03 15:35:14,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:35:14,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:35:14,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:35:14,235 INFO L225 Difference]: With dead ends: 47435 [2021-05-03 15:35:14,235 INFO L226 Difference]: Without dead ends: 47435 [2021-05-03 15:35:14,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:35:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47435 states. [2021-05-03 15:35:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47435 to 31630. [2021-05-03 15:35:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31630 states, 31629 states have (on average 4.46277150716115) internal successors, (141153), 31629 states have internal predecessors, (141153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:15,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31630 states to 31630 states and 141153 transitions. [2021-05-03 15:35:15,768 INFO L78 Accepts]: Start accepts. Automaton has 31630 states and 141153 transitions. Word has length 43 [2021-05-03 15:35:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:35:15,768 INFO L480 AbstractCegarLoop]: Abstraction has 31630 states and 141153 transitions. [2021-05-03 15:35:15,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 31630 states and 141153 transitions. [2021-05-03 15:35:15,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:35:15,862 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:35:15,862 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:35:16,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-03 15:35:16,063 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:35:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:35:16,064 INFO L82 PathProgramCache]: Analyzing trace with hash -923525084, now seen corresponding path program 26 times [2021-05-03 15:35:16,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:35:16,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627785265] [2021-05-03 15:35:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:35:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:35:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-03 15:35:16,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627785265] [2021-05-03 15:35:16,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925179881] [2021-05-03 15:35:16,117 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 [2021-05-03 15:35:16,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:35:16,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:35:16,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 15:35:16,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:35:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-03 15:35:16,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:35:16,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 15:35:16,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065622346] [2021-05-03 15:35:16,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:35:16,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:35:16,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:35:16,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:35:16,228 INFO L87 Difference]: Start difference. First operand 31630 states and 141153 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:35:17,114 INFO L93 Difference]: Finished difference Result 55575 states and 232789 transitions. [2021-05-03 15:35:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 15:35:17,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:35:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:35:17,384 INFO L225 Difference]: With dead ends: 55575 [2021-05-03 15:35:17,384 INFO L226 Difference]: Without dead ends: 55575 [2021-05-03 15:35:17,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:35:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55575 states. [2021-05-03 15:35:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55575 to 34112. [2021-05-03 15:35:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34112 states, 34111 states have (on average 4.445692005511418) internal successors, (151647), 34111 states have internal predecessors, (151647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34112 states to 34112 states and 151647 transitions. [2021-05-03 15:35:18,855 INFO L78 Accepts]: Start accepts. Automaton has 34112 states and 151647 transitions. Word has length 43 [2021-05-03 15:35:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:35:18,855 INFO L480 AbstractCegarLoop]: Abstraction has 34112 states and 151647 transitions. [2021-05-03 15:35:18,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 34112 states and 151647 transitions. [2021-05-03 15:35:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:35:18,958 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:35:18,958 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:35:19,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-03 15:35:19,159 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:35:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:35:19,159 INFO L82 PathProgramCache]: Analyzing trace with hash 780645344, now seen corresponding path program 27 times [2021-05-03 15:35:19,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:35:19,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555527490] [2021-05-03 15:35:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:35:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:35:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-03 15:35:19,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555527490] [2021-05-03 15:35:19,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896229288] [2021-05-03 15:35:19,204 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) [2021-05-03 15:35:19,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 15:35:19,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:35:19,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 15:35:19,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:35:19,382 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-05-03 15:35:19,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 28 [2021-05-03 15:35:19,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:35:19,410 INFO L628 ElimStorePlain]: treesize reduction 15, result has 63.4 percent of original size [2021-05-03 15:35:19,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:35:19,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2021-05-03 15:35:19,840 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_34], 6=[v_prenex_31]} [2021-05-03 15:35:19,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 15:35:19,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:35:19,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:35:19,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 15:35:19,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:35:19,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:35:19,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:35:19,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:35:19,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:19,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:35:19,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:35:19,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:35:19,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:35:19,975 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:127, output treesize:3 [2021-05-03 15:35:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-03 15:35:20,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:35:20,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2021-05-03 15:35:20,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515200824] [2021-05-03 15:35:20,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:35:20,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:35:20,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:35:20,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:35:20,016 INFO L87 Difference]: Start difference. First operand 34112 states and 151647 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:21,609 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 15:35:22,791 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-05-03 15:35:23,052 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 15:35:23,628 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 15:35:24,428 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 15:35:28,195 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 15:35:28,514 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 15:35:28,818 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 15:35:29,834 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 15:35:29,987 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 15:35:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:35:31,019 INFO L93 Difference]: Finished difference Result 105538 states and 440346 transitions. [2021-05-03 15:35:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2021-05-03 15:35:31,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:35:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:35:31,294 INFO L225 Difference]: With dead ends: 105538 [2021-05-03 15:35:31,295 INFO L226 Difference]: Without dead ends: 59269 [2021-05-03 15:35:31,301 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21370 ImplicationChecksByTransitivity, 8602.5ms TimeCoverageRelationStatistics Valid=5872, Invalid=41870, Unknown=0, NotChecked=0, Total=47742 [2021-05-03 15:35:31,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59269 states. [2021-05-03 15:35:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59269 to 40822. [2021-05-03 15:35:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40822 states, 40821 states have (on average 4.461208691604811) internal successors, (182111), 40821 states have internal predecessors, (182111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40822 states to 40822 states and 182111 transitions. [2021-05-03 15:35:32,816 INFO L78 Accepts]: Start accepts. Automaton has 40822 states and 182111 transitions. Word has length 43 [2021-05-03 15:35:32,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:35:32,816 INFO L480 AbstractCegarLoop]: Abstraction has 40822 states and 182111 transitions. [2021-05-03 15:35:32,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 40822 states and 182111 transitions. [2021-05-03 15:35:32,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:35:32,927 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:35:32,927 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:35:33,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:35:33,128 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:35:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:35:33,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1332529956, now seen corresponding path program 28 times [2021-05-03 15:35:33,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:35:33,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952611218] [2021-05-03 15:35:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:35:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:35:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 15:35:33,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952611218] [2021-05-03 15:35:33,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250376230] [2021-05-03 15:35:33,179 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 [2021-05-03 15:35:33,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:35:33,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:35:33,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 15:35:33,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:35:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 15:35:33,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:35:33,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 15:35:33,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572661542] [2021-05-03 15:35:33,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:35:33,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:35:33,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:35:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:35:33,684 INFO L87 Difference]: Start difference. First operand 40822 states and 182111 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:35:34,262 INFO L93 Difference]: Finished difference Result 59964 states and 255087 transitions. [2021-05-03 15:35:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:35:34,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:35:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:35:34,505 INFO L225 Difference]: With dead ends: 59964 [2021-05-03 15:35:34,506 INFO L226 Difference]: Without dead ends: 59964 [2021-05-03 15:35:34,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:35:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59964 states. [2021-05-03 15:35:35,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59964 to 25606. [2021-05-03 15:35:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25606 states, 25605 states have (on average 4.357078695567272) internal successors, (111563), 25605 states have internal predecessors, (111563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25606 states to 25606 states and 111563 transitions. [2021-05-03 15:35:35,807 INFO L78 Accepts]: Start accepts. Automaton has 25606 states and 111563 transitions. Word has length 43 [2021-05-03 15:35:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:35:35,807 INFO L480 AbstractCegarLoop]: Abstraction has 25606 states and 111563 transitions. [2021-05-03 15:35:35,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 25606 states and 111563 transitions. [2021-05-03 15:35:35,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 15:35:35,882 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:35:35,882 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:35:36,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:35:36,083 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:35:36,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:35:36,083 INFO L82 PathProgramCache]: Analyzing trace with hash 932816428, now seen corresponding path program 29 times [2021-05-03 15:35:36,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:35:36,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342393143] [2021-05-03 15:35:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:35:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:35:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 15:35:36,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342393143] [2021-05-03 15:35:36,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728667422] [2021-05-03 15:35:36,148 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 [2021-05-03 15:35:36,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 15:35:36,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:35:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:35:36,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:35:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 15:35:36,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:35:36,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 15:35:36,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138483327] [2021-05-03 15:35:36,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:35:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:35:36,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:35:36,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:35:36,265 INFO L87 Difference]: Start difference. First operand 25606 states and 111563 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-05-03 15:35:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:35:37,424 INFO L93 Difference]: Finished difference Result 73107 states and 310778 transitions. [2021-05-03 15:35:37,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:35:37,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 45 [2021-05-03 15:35:37,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:35:37,785 INFO L225 Difference]: With dead ends: 73107 [2021-05-03 15:35:37,785 INFO L226 Difference]: Without dead ends: 73107 [2021-05-03 15:35:37,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:35:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73107 states. [2021-05-03 15:35:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73107 to 51314. [2021-05-03 15:35:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51314 states, 51313 states have (on average 4.386042523337166) internal successors, (225061), 51313 states have internal predecessors, (225061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51314 states to 51314 states and 225061 transitions. [2021-05-03 15:35:39,787 INFO L78 Accepts]: Start accepts. Automaton has 51314 states and 225061 transitions. Word has length 45 [2021-05-03 15:35:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:35:39,787 INFO L480 AbstractCegarLoop]: Abstraction has 51314 states and 225061 transitions. [2021-05-03 15:35:39,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-05-03 15:35:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 51314 states and 225061 transitions. [2021-05-03 15:35:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 15:35:39,906 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:35:39,906 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:35:40,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-05-03 15:35:40,106 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:35:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:35:40,107 INFO L82 PathProgramCache]: Analyzing trace with hash 369841352, now seen corresponding path program 30 times [2021-05-03 15:35:40,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:35:40,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845465848] [2021-05-03 15:35:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:35:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:35:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 15:35:40,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845465848] [2021-05-03 15:35:40,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408206838] [2021-05-03 15:35:40,147 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 [2021-05-03 15:35:40,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:35:40,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:35:40,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 15:35:40,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:35:40,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 7 [2021-05-03 15:35:40,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:35:40,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:35:40,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:35:40,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2021-05-03 15:35:41,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:41,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:35:41,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-05-03 15:35:41,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:35:41,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:35:41,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:35:41,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-05-03 15:35:41,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 15:35:41,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:35:41,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 15:35:41,346 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:75, output treesize:22 [2021-05-03 15:35:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-03 15:35:41,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:35:41,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-05-03 15:35:41,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710170504] [2021-05-03 15:35:41,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:35:41,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:35:41,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:35:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:35:41,452 INFO L87 Difference]: Start difference. First operand 51314 states and 225061 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:45,910 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 15:35:46,671 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 15:35:46,854 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 15:35:47,912 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 15:35:48,482 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 15:35:48,716 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 15:35:49,252 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 15:35:50,478 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 15:35:50,875 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:35:51,308 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-03 15:35:52,313 WARN L205 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 15:35:52,802 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 15:35:53,081 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 15:35:56,107 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 15:35:56,700 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:35:57,146 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-03 15:35:59,404 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 15:36:00,001 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:36:00,228 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 15:36:00,475 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-05-03 15:36:00,656 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-05-03 15:36:02,649 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-03 15:36:03,298 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:36:03,696 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-05-03 15:36:03,904 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-05-03 15:36:05,645 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 15:36:06,199 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-03 15:36:06,626 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 15:36:07,876 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 15:36:08,149 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 15:36:08,853 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-03 15:36:09,017 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 15:36:09,444 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 15:36:09,665 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-05-03 15:36:09,962 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:36:10,474 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:36:11,254 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 15:36:11,684 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-03 15:36:11,995 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 15:36:12,241 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-05-03 15:36:12,840 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:36:13,340 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 15:36:13,745 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 15:36:14,181 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-03 15:36:14,419 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:36:15,178 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:36:15,605 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-03 15:36:15,882 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:36:16,291 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-05-03 15:36:16,778 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-05-03 15:36:17,029 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-05-03 15:36:17,322 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-05-03 15:36:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:17,711 INFO L93 Difference]: Finished difference Result 76525 states and 328162 transitions. [2021-05-03 15:36:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-03 15:36:17,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 15:36:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:18,034 INFO L225 Difference]: With dead ends: 76525 [2021-05-03 15:36:18,035 INFO L226 Difference]: Without dead ends: 75801 [2021-05-03 15:36:18,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4870 ImplicationChecksByTransitivity, 21043.7ms TimeCoverageRelationStatistics Valid=2312, Invalid=13690, Unknown=0, NotChecked=0, Total=16002 [2021-05-03 15:36:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75801 states. [2021-05-03 15:36:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75801 to 48431. [2021-05-03 15:36:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48431 states, 48430 states have (on average 4.387156721040677) internal successors, (212470), 48430 states have internal predecessors, (212470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48431 states to 48431 states and 212470 transitions. [2021-05-03 15:36:20,009 INFO L78 Accepts]: Start accepts. Automaton has 48431 states and 212470 transitions. Word has length 45 [2021-05-03 15:36:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:20,009 INFO L480 AbstractCegarLoop]: Abstraction has 48431 states and 212470 transitions. [2021-05-03 15:36:20,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 48431 states and 212470 transitions. [2021-05-03 15:36:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 15:36:20,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:20,140 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:20,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:20,341 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:20,342 INFO L82 PathProgramCache]: Analyzing trace with hash 683094210, now seen corresponding path program 31 times [2021-05-03 15:36:20,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:20,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593261044] [2021-05-03 15:36:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 15:36:20,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593261044] [2021-05-03 15:36:20,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8763107] [2021-05-03 15:36:20,406 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 [2021-05-03 15:36:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:36:20,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 15:36:20,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:20,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-03 15:36:20,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936003058] [2021-05-03 15:36:20,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:36:20,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:20,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:36:20,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:36:20,507 INFO L87 Difference]: Start difference. First operand 48431 states and 212470 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-05-03 15:36:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:22,082 INFO L93 Difference]: Finished difference Result 134784 states and 573076 transitions. [2021-05-03 15:36:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:36:22,083 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 45 [2021-05-03 15:36:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:22,726 INFO L225 Difference]: With dead ends: 134784 [2021-05-03 15:36:22,727 INFO L226 Difference]: Without dead ends: 132608 [2021-05-03 15:36:22,727 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:36:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132608 states. [2021-05-03 15:36:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132608 to 63740. [2021-05-03 15:36:25,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63740 states, 63739 states have (on average 4.3838623134972305) internal successors, (279423), 63739 states have internal predecessors, (279423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63740 states to 63740 states and 279423 transitions. [2021-05-03 15:36:25,580 INFO L78 Accepts]: Start accepts. Automaton has 63740 states and 279423 transitions. Word has length 45 [2021-05-03 15:36:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:25,580 INFO L480 AbstractCegarLoop]: Abstraction has 63740 states and 279423 transitions. [2021-05-03 15:36:25,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-05-03 15:36:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 63740 states and 279423 transitions. [2021-05-03 15:36:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:36:25,746 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:25,746 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:25,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-05-03 15:36:25,948 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:25,948 INFO L82 PathProgramCache]: Analyzing trace with hash -218983474, now seen corresponding path program 32 times [2021-05-03 15:36:25,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:25,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350686746] [2021-05-03 15:36:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:26,719 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-05-03 15:36:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-03 15:36:26,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350686746] [2021-05-03 15:36:26,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832985657] [2021-05-03 15:36:26,742 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 [2021-05-03 15:36:26,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:36:26,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:36:26,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:36:27,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-05-03 15:36:27,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:36:27,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-05-03 15:36:27,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:36:27,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:36:27,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 15:36:27,082 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-05-03 15:36:27,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:36:27,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:36:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:36:27,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-05-03 15:36:27,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:36:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:36:27,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:36:27,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-05-03 15:36:27,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:36:27,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:36:27,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 15:36:27,171 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:45 [2021-05-03 15:36:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:36:27,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:36:27,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:36:27,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-05-03 15:36:27,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:36:27,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:36:27,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:36:27,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-05-03 15:36:27,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:36:27,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:36:27,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 15:36:27,255 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:39 [2021-05-03 15:36:27,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:36:27,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-05-03 15:36:27,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:36:27,570 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-05-03 15:36:27,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 15:36:27,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:36:27,627 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-05-03 15:36:27,642 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 15:36:27,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2021-05-03 15:36:27,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:36:27,649 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 15:36:27,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 15:36:27,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:36:27,660 INFO L628 ElimStorePlain]: treesize reduction 34, result has 12.8 percent of original size [2021-05-03 15:36:27,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:36:27,661 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:109, output treesize:5 [2021-05-03 15:36:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 15:36:27,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:27,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-05-03 15:36:27,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120604817] [2021-05-03 15:36:27,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:36:27,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:27,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:36:27,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:36:27,682 INFO L87 Difference]: Start difference. First operand 63740 states and 279423 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:29,168 INFO L93 Difference]: Finished difference Result 77640 states and 338533 transitions. [2021-05-03 15:36:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:36:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:36:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:29,170 INFO L225 Difference]: With dead ends: 77640 [2021-05-03 15:36:29,170 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 15:36:29,170 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1129.3ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:36:29,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 15:36:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 15:36:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 15:36:29,171 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-05-03 15:36:29,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:29,171 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 15:36:29,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 15:36:29,171 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 15:36:29,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-03 15:36:29,376 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 03:36:29 BasicIcfg [2021-05-03 15:36:29,376 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 15:36:29,376 INFO L168 Benchmark]: Toolchain (without parser) took 403659.31 ms. Allocated memory was 367.0 MB in the beginning and 12.5 GB in the end (delta: 12.1 GB). Free memory was 345.6 MB in the beginning and 8.4 GB in the end (delta: -8.1 GB). Peak memory consumption was 4.0 GB. Max. memory is 16.0 GB. [2021-05-03 15:36:29,376 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 367.0 MB. Free memory is still 346.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:36:29,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.00 ms. Allocated memory is still 367.0 MB. Free memory was 345.6 MB in the beginning and 344.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:36:29,376 INFO L168 Benchmark]: Boogie Preprocessor took 19.18 ms. Allocated memory is still 367.0 MB. Free memory was 344.1 MB in the beginning and 343.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 15:36:29,376 INFO L168 Benchmark]: RCFGBuilder took 221.40 ms. Allocated memory is still 367.0 MB. Free memory was 343.0 MB in the beginning and 329.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 15:36:29,377 INFO L168 Benchmark]: TraceAbstraction took 403395.05 ms. Allocated memory was 367.0 MB in the beginning and 12.5 GB in the end (delta: 12.1 GB). Free memory was 329.0 MB in the beginning and 8.4 GB in the end (delta: -8.1 GB). Peak memory consumption was 4.0 GB. Max. memory is 16.0 GB. [2021-05-03 15:36:29,377 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 367.0 MB. Free memory is still 346.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.00 ms. Allocated memory is still 367.0 MB. Free memory was 345.6 MB in the beginning and 344.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.18 ms. Allocated memory is still 367.0 MB. Free memory was 344.1 MB in the beginning and 343.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 221.40 ms. Allocated memory is still 367.0 MB. Free memory was 343.0 MB in the beginning and 329.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 403395.05 ms. Allocated memory was 367.0 MB in the beginning and 12.5 GB in the end (delta: 12.1 GB). Free memory was 329.0 MB in the beginning and 8.4 GB in the end (delta: -8.1 GB). Peak memory consumption was 4.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 77]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 403303.7ms, OverallIterations: 42, TraceHistogramMax: 4, EmptinessCheckTime: 1486.9ms, AutomataDifference: 350036.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 75.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2685 SDtfs, 11116 SDslu, 15832 SDs, 0 SdLazy, 17618 SolverSat, 1698 SolverUnsat, 41 SolverUnknown, 0 SolverNotchecked, 109998.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2590 GetRequests, 1388 SyntacticMatches, 35 SemanticMatches, 1167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37154 ImplicationChecksByTransitivity, 235716.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=63740occurred in iteration=41, InterpolantAutomatonStates: 1128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21449.2ms AutomataMinimizationTime, 42 MinimizatonAttempts, 350364 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 210.5ms SsaConstructionTime, 1225.6ms SatisfiabilityAnalysisTime, 20598.1ms InterpolantComputationTime, 2797 NumberOfCodeBlocks, 2781 NumberOfCodeBlocksAsserted, 138 NumberOfCheckSat, 2720 ConstructedInterpolants, 39 QuantifiedInterpolants, 13743 SizeOfPredicates, 84 NumberOfNonLiveVariables, 3556 ConjunctsInSsa, 387 ConjunctsInUnsatCore, 77 InterpolantComputations, 7 PerfectInterpolantSequences, 852/1509 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...