/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:16:57,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:16:57,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:16:57,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 14:16:57,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 14:16:57,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 14:16:57,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 14:16:57,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 14:16:57,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 14:16:57,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 14:16:57,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 14:16:57,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 14:16:57,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 14:16:57,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 14:16:57,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 14:16:57,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 14:16:57,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 14:16:57,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 14:16:57,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 14:16:57,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 14:16:57,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 14:16:57,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 14:16:57,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 14:16:57,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 14:16:57,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 14:16:57,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 14:16:57,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 14:16:57,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 14:16:57,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 14:16:57,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 14:16:57,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 14:16:57,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 14:16:57,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 14:16:57,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 14:16:57,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 14:16:57,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 14:16:57,935 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 14:16:57,964 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:16:57,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:16:57,964 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:16:57,964 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:16:57,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:16:57,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:16:57,967 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:16:57,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:16:57,967 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:16:57,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:16:57,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:16:57,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:16:57,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:16:57,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:16:57,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:16:57,969 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:16:57,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:16:57,969 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:16:57,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:16:57,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:16:57,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:16:57,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:16:57,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:16:57,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:16:57,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:16:57,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:16:57,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:16:57,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:16:57,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:16:57,970 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:16:57,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:16:57,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:16:58,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:16:58,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:16:58,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:16:58,312 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:16:58,313 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:16:58,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl [2021-05-03 14:16:58,314 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl' [2021-05-03 14:16:58,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:16:58,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:16:58,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:16:58,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:16:58,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:16:58,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:16:58" (1/1) ... [2021-05-03 14:16:58,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:16:58" (1/1) ... [2021-05-03 14:16:58,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:16:58,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:16:58,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:16:58,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:16:58,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:16:58" (1/1) ... [2021-05-03 14:16:58,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:16:58" (1/1) ... [2021-05-03 14:16:58,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:16:58" (1/1) ... [2021-05-03 14:16:58,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:16:58" (1/1) ... [2021-05-03 14:16:58,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:16:58" (1/1) ... [2021-05-03 14:16:58,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:16:58" (1/1) ... [2021-05-03 14:16:58,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:16:58" (1/1) ... [2021-05-03 14:16:58,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:16:58,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:16:58,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:16:58,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:16:58,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:16:58" (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 14:16:58,631 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:16:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:16:58,631 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:16:58,631 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:16:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:16:58,631 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:16:58,632 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:16:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:16:58,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:16:58,632 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 14:16:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 14:16:58,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 14:16:58,632 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 14:16:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 14:16:58,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 14:16:58,633 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 14:16:58,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:16:58,869 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 14:16:58,870 INFO L202 PluginConnector]: Adding new model exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:16:58 BoogieIcfgContainer [2021-05-03 14:16:58,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:16:58,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:16:58,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:16:58,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:16:58,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:16:58" (1/2) ... [2021-05-03 14:16:58,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a04b7 and model type exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:16:58, skipping insertion in model container [2021-05-03 14:16:58,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:16:58" (2/2) ... [2021-05-03 14:16:58,888 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x3.wvr.bpl [2021-05-03 14:16:58,892 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:16:58,892 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:16:58,895 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:16:58,896 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:16:59,022 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-03 14:16:59,034 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-03 14:16:59,047 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:16:59,047 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:16:59,047 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:16:59,048 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:16:59,048 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:16:59,048 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:16:59,048 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:16:59,059 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:16:59,065 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-05-03 14:16:59,145 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states 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 14:16:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states 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 14:16:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:16:59,162 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:59,162 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:59,162 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:59,166 INFO L82 PathProgramCache]: Analyzing trace with hash 458845607, now seen corresponding path program 1 times [2021-05-03 14:16:59,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:59,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440393395] [2021-05-03 14:16:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:59,382 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 14:16:59,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440393395] [2021-05-03 14:16:59,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:16:59,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 14:16:59,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108189158] [2021-05-03 14:16:59,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 14:16:59,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:59,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 14:16:59,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:16:59,421 INFO L87 Difference]: Start difference. First operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 14:16:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:59,512 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-05-03 14:16:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 14:16:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:16:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:59,553 INFO L225 Difference]: With dead ends: 854 [2021-05-03 14:16:59,553 INFO L226 Difference]: Without dead ends: 823 [2021-05-03 14:16:59,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:16:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-05-03 14:16:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-05-03 14:16:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states 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 14:16:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-05-03 14:16:59,648 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-05-03 14:16:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:59,650 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-05-03 14:16:59,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 14:16:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-05-03 14:16:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:16:59,657 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:59,658 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] [2021-05-03 14:16:59,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:16:59,658 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:59,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:59,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1952747655, now seen corresponding path program 1 times [2021-05-03 14:16:59,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:59,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321798001] [2021-05-03 14:16:59,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:59,737 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 14:16:59,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321798001] [2021-05-03 14:16:59,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778826552] [2021-05-03 14:16:59,738 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 14:16:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 14:16:59,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:59,889 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 14:16:59,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:59,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-03 14:16:59,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87268309] [2021-05-03 14:16:59,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:16:59,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:59,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:16:59,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:16:59,898 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:00,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:00,019 INFO L93 Difference]: Finished difference Result 1354 states and 5079 transitions. [2021-05-03 14:17:00,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:17:00,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:17:00,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:00,027 INFO L225 Difference]: With dead ends: 1354 [2021-05-03 14:17:00,028 INFO L226 Difference]: Without dead ends: 1354 [2021-05-03 14:17:00,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-05-03 14:17:00,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 687. [2021-05-03 14:17:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.956268221574344) internal successors, (2714), 686 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states 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 14:17:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2714 transitions. [2021-05-03 14:17:00,070 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2714 transitions. Word has length 21 [2021-05-03 14:17:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:00,070 INFO L480 AbstractCegarLoop]: Abstraction has 687 states and 2714 transitions. [2021-05-03 14:17:00,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2714 transitions. [2021-05-03 14:17:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:17:00,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:00,072 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] [2021-05-03 14:17:00,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 14:17:00,274 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:00,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:00,275 INFO L82 PathProgramCache]: Analyzing trace with hash -338545309, now seen corresponding path program 1 times [2021-05-03 14:17:00,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:00,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906556865] [2021-05-03 14:17:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:00,342 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 14:17:00,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906556865] [2021-05-03 14:17:00,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:17:00,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:17:00,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831692918] [2021-05-03 14:17:00,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:17:00,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:00,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:17:00,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:17:00,346 INFO L87 Difference]: Start difference. First operand 687 states and 2714 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:00,386 INFO L93 Difference]: Finished difference Result 973 states and 3608 transitions. [2021-05-03 14:17:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:17:00,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:17:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:00,392 INFO L225 Difference]: With dead ends: 973 [2021-05-03 14:17:00,392 INFO L226 Difference]: Without dead ends: 953 [2021-05-03 14:17:00,397 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:17:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-05-03 14:17:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 775. [2021-05-03 14:17:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.8359173126614987) internal successors, (2969), 774 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states 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 14:17:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2969 transitions. [2021-05-03 14:17:00,424 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2969 transitions. Word has length 21 [2021-05-03 14:17:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:00,424 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 2969 transitions. [2021-05-03 14:17:00,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2969 transitions. [2021-05-03 14:17:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:17:00,426 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:00,427 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] [2021-05-03 14:17:00,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 14:17:00,427 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:00,428 INFO L82 PathProgramCache]: Analyzing trace with hash 230830505, now seen corresponding path program 1 times [2021-05-03 14:17:00,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:00,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921334663] [2021-05-03 14:17:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:00,456 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 14:17:00,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921334663] [2021-05-03 14:17:00,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439955671] [2021-05-03 14:17:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:00,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 14:17:00,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:00,559 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 14:17:00,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:00,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-05-03 14:17:00,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903214150] [2021-05-03 14:17:00,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:17:00,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:00,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:17:00,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:17:00,560 INFO L87 Difference]: Start difference. First operand 775 states and 2969 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:00,659 INFO L93 Difference]: Finished difference Result 1748 states and 6634 transitions. [2021-05-03 14:17:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:17:00,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:17:00,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:00,669 INFO L225 Difference]: With dead ends: 1748 [2021-05-03 14:17:00,669 INFO L226 Difference]: Without dead ends: 1748 [2021-05-03 14:17:00,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:00,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-05-03 14:17:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 931. [2021-05-03 14:17:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.968817204301075) internal successors, (3691), 930 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states 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 14:17:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3691 transitions. [2021-05-03 14:17:00,707 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3691 transitions. Word has length 21 [2021-05-03 14:17:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:00,707 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3691 transitions. [2021-05-03 14:17:00,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3691 transitions. [2021-05-03 14:17:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:17:00,710 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:00,710 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] [2021-05-03 14:17:00,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:00,926 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:00,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:00,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1827020503, now seen corresponding path program 1 times [2021-05-03 14:17:00,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:00,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872430980] [2021-05-03 14:17:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:01,066 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 14:17:01,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872430980] [2021-05-03 14:17:01,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:17:01,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:17:01,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680651526] [2021-05-03 14:17:01,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:17:01,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:01,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:17:01,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:17:01,067 INFO L87 Difference]: Start difference. First operand 931 states and 3691 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:01,522 INFO L93 Difference]: Finished difference Result 1477 states and 5627 transitions. [2021-05-03 14:17:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:17:01,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:17:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:01,532 INFO L225 Difference]: With dead ends: 1477 [2021-05-03 14:17:01,535 INFO L226 Difference]: Without dead ends: 1453 [2021-05-03 14:17:01,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-05-03 14:17:01,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 985. [2021-05-03 14:17:01,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.9227642276422765) internal successors, (3860), 984 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states 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 14:17:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3860 transitions. [2021-05-03 14:17:01,570 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3860 transitions. Word has length 21 [2021-05-03 14:17:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:01,570 INFO L480 AbstractCegarLoop]: Abstraction has 985 states and 3860 transitions. [2021-05-03 14:17:01,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3860 transitions. [2021-05-03 14:17:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:17:01,574 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:01,574 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] [2021-05-03 14:17:01,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 14:17:01,574 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:01,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:01,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1868838615, now seen corresponding path program 2 times [2021-05-03 14:17:01,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:01,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698437460] [2021-05-03 14:17:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:01,618 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 14:17:01,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698437460] [2021-05-03 14:17:01,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:17:01,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:17:01,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119835630] [2021-05-03 14:17:01,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:17:01,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:01,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:17:01,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:17:01,619 INFO L87 Difference]: Start difference. First operand 985 states and 3860 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:02,277 INFO L93 Difference]: Finished difference Result 1520 states and 5831 transitions. [2021-05-03 14:17:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:17:02,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:17:02,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:02,285 INFO L225 Difference]: With dead ends: 1520 [2021-05-03 14:17:02,285 INFO L226 Difference]: Without dead ends: 1520 [2021-05-03 14:17:02,285 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-05-03 14:17:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1119. [2021-05-03 14:17:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.952593917710197) internal successors, (4419), 1118 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states 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 14:17:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 4419 transitions. [2021-05-03 14:17:02,364 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 4419 transitions. Word has length 21 [2021-05-03 14:17:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:02,375 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 4419 transitions. [2021-05-03 14:17:02,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 4419 transitions. [2021-05-03 14:17:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:17:02,390 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:02,390 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] [2021-05-03 14:17:02,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 14:17:02,390 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:02,391 INFO L82 PathProgramCache]: Analyzing trace with hash -879371935, now seen corresponding path program 2 times [2021-05-03 14:17:02,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:02,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174663682] [2021-05-03 14:17:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:02,561 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 14:17:02,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174663682] [2021-05-03 14:17:02,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:17:02,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:17:02,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994338608] [2021-05-03 14:17:02,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:17:02,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:02,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:17:02,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:17:02,562 INFO L87 Difference]: Start difference. First operand 1119 states and 4419 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:03,054 INFO L93 Difference]: Finished difference Result 1519 states and 5747 transitions. [2021-05-03 14:17:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:17:03,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:17:03,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:03,063 INFO L225 Difference]: With dead ends: 1519 [2021-05-03 14:17:03,064 INFO L226 Difference]: Without dead ends: 1478 [2021-05-03 14:17:03,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-05-03 14:17:03,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1174. [2021-05-03 14:17:03,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.9028132992327365) internal successors, (4578), 1173 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states 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 14:17:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 4578 transitions. [2021-05-03 14:17:03,116 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 4578 transitions. Word has length 21 [2021-05-03 14:17:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:03,116 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 4578 transitions. [2021-05-03 14:17:03,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 4578 transitions. [2021-05-03 14:17:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:17:03,121 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:03,121 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] [2021-05-03 14:17:03,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 14:17:03,121 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1863098109, now seen corresponding path program 2 times [2021-05-03 14:17:03,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:03,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399436838] [2021-05-03 14:17:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:03,176 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 14:17:03,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399436838] [2021-05-03 14:17:03,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:17:03,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:17:03,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280212599] [2021-05-03 14:17:03,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:17:03,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:03,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:17:03,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:03,177 INFO L87 Difference]: Start difference. First operand 1174 states and 4578 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:03,616 INFO L93 Difference]: Finished difference Result 1589 states and 6051 transitions. [2021-05-03 14:17:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:17:03,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:17:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:03,625 INFO L225 Difference]: With dead ends: 1589 [2021-05-03 14:17:03,625 INFO L226 Difference]: Without dead ends: 1589 [2021-05-03 14:17:03,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-05-03 14:17:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1285. [2021-05-03 14:17:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.9088785046728973) internal successors, (5019), 1284 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states 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 14:17:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 5019 transitions. [2021-05-03 14:17:03,681 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 5019 transitions. Word has length 21 [2021-05-03 14:17:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:03,682 INFO L480 AbstractCegarLoop]: Abstraction has 1285 states and 5019 transitions. [2021-05-03 14:17:03,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 5019 transitions. [2021-05-03 14:17:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 14:17:03,687 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:03,687 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 14:17:03,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 14:17:03,687 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:03,688 INFO L82 PathProgramCache]: Analyzing trace with hash 782245955, now seen corresponding path program 1 times [2021-05-03 14:17:03,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:03,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785705639] [2021-05-03 14:17:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:03,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785705639] [2021-05-03 14:17:03,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038375871] [2021-05-03 14:17:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:03,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:17:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:04,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:04,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-05-03 14:17:04,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886355916] [2021-05-03 14:17:04,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:17:04,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:04,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:17:04,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:04,105 INFO L87 Difference]: Start difference. First operand 1285 states and 5019 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:04,189 INFO L93 Difference]: Finished difference Result 2143 states and 8130 transitions. [2021-05-03 14:17:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:17:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 14:17:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:04,214 INFO L225 Difference]: With dead ends: 2143 [2021-05-03 14:17:04,214 INFO L226 Difference]: Without dead ends: 2075 [2021-05-03 14:17:04,214 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-05-03 14:17:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1564. [2021-05-03 14:17:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.9366602687140113) internal successors, (6153), 1563 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states 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 14:17:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 6153 transitions. [2021-05-03 14:17:04,258 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 6153 transitions. Word has length 23 [2021-05-03 14:17:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:04,259 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 6153 transitions. [2021-05-03 14:17:04,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 6153 transitions. [2021-05-03 14:17:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 14:17:04,264 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:04,265 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 14:17:04,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:04,481 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1114307901, now seen corresponding path program 2 times [2021-05-03 14:17:04,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:04,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023243357] [2021-05-03 14:17:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:17:04,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023243357] [2021-05-03 14:17:04,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:17:04,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:17:04,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228152455] [2021-05-03 14:17:04,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:17:04,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:04,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:17:04,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:17:04,559 INFO L87 Difference]: Start difference. First operand 1564 states and 6153 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 14:17:04,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:04,614 INFO L93 Difference]: Finished difference Result 2365 states and 9064 transitions. [2021-05-03 14:17:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:17:04,614 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 14:17:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:04,622 INFO L225 Difference]: With dead ends: 2365 [2021-05-03 14:17:04,622 INFO L226 Difference]: Without dead ends: 2297 [2021-05-03 14:17:04,623 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:17:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-05-03 14:17:04,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1785. [2021-05-03 14:17:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.9551569506726456) internal successors, (7056), 1784 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states 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 14:17:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 7056 transitions. [2021-05-03 14:17:04,670 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 7056 transitions. Word has length 23 [2021-05-03 14:17:04,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:04,670 INFO L480 AbstractCegarLoop]: Abstraction has 1785 states and 7056 transitions. [2021-05-03 14:17:04,670 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 14:17:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 7056 transitions. [2021-05-03 14:17:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 14:17:04,674 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:04,675 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 14:17:04,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 14:17:04,675 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:04,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:04,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1906201429, now seen corresponding path program 1 times [2021-05-03 14:17:04,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:04,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93140743] [2021-05-03 14:17:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:04,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93140743] [2021-05-03 14:17:04,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745226366] [2021-05-03 14:17:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:04,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:17:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:04,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:04,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-05-03 14:17:04,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120672586] [2021-05-03 14:17:04,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:17:04,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:04,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:17:04,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:04,858 INFO L87 Difference]: Start difference. First operand 1785 states and 7056 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:04,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:04,957 INFO L93 Difference]: Finished difference Result 2448 states and 9424 transitions. [2021-05-03 14:17:04,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:17:04,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 14:17:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:04,966 INFO L225 Difference]: With dead ends: 2448 [2021-05-03 14:17:04,966 INFO L226 Difference]: Without dead ends: 2397 [2021-05-03 14:17:04,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-05-03 14:17:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2051. [2021-05-03 14:17:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.951219512195122) internal successors, (8100), 2050 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states 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 14:17:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 8100 transitions. [2021-05-03 14:17:05,048 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 8100 transitions. Word has length 23 [2021-05-03 14:17:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:05,049 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 8100 transitions. [2021-05-03 14:17:05,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:05,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 8100 transitions. [2021-05-03 14:17:05,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 14:17:05,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:05,054 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 14:17:05,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:05,269 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:05,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2019657699, now seen corresponding path program 2 times [2021-05-03 14:17:05,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:05,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323233873] [2021-05-03 14:17:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:17:05,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323233873] [2021-05-03 14:17:05,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:17:05,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:17:05,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826662177] [2021-05-03 14:17:05,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:17:05,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:17:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:17:05,339 INFO L87 Difference]: Start difference. First operand 2051 states and 8100 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 14:17:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:05,483 INFO L93 Difference]: Finished difference Result 2710 states and 10468 transitions. [2021-05-03 14:17:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:17:05,483 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 14:17:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:05,492 INFO L225 Difference]: With dead ends: 2710 [2021-05-03 14:17:05,492 INFO L226 Difference]: Without dead ends: 2659 [2021-05-03 14:17:05,493 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:17:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-05-03 14:17:05,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2311. [2021-05-03 14:17:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 3.9484848484848483) internal successors, (9121), 2310 states have internal predecessors, (9121), 0 states have call successors, (0), 0 states 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 14:17:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 9121 transitions. [2021-05-03 14:17:05,618 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 9121 transitions. Word has length 23 [2021-05-03 14:17:05,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:05,619 INFO L480 AbstractCegarLoop]: Abstraction has 2311 states and 9121 transitions. [2021-05-03 14:17:05,619 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 14:17:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 9121 transitions. [2021-05-03 14:17:05,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:05,625 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:05,625 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] [2021-05-03 14:17:05,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 14:17:05,625 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:05,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:05,626 INFO L82 PathProgramCache]: Analyzing trace with hash 446034501, now seen corresponding path program 3 times [2021-05-03 14:17:05,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:05,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876829597] [2021-05-03 14:17:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:05,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876829597] [2021-05-03 14:17:05,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388206422] [2021-05-03 14:17:05,691 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 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 14:17:05,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:17:05,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:05,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:05,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:05,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:05,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 14:17:05,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240486571] [2021-05-03 14:17:05,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:05,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:05,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:05,799 INFO L87 Difference]: Start difference. First operand 2311 states and 9121 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:06,238 INFO L93 Difference]: Finished difference Result 6038 states and 23046 transitions. [2021-05-03 14:17:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:17:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:06,267 INFO L225 Difference]: With dead ends: 6038 [2021-05-03 14:17:06,267 INFO L226 Difference]: Without dead ends: 6038 [2021-05-03 14:17:06,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:17:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2021-05-03 14:17:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 2800. [2021-05-03 14:17:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 4.00821722043587) internal successors, (11219), 2799 states have internal predecessors, (11219), 0 states have call successors, (0), 0 states 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 14:17:06,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 11219 transitions. [2021-05-03 14:17:06,394 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 11219 transitions. Word has length 25 [2021-05-03 14:17:06,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:06,394 INFO L480 AbstractCegarLoop]: Abstraction has 2800 states and 11219 transitions. [2021-05-03 14:17:06,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 11219 transitions. [2021-05-03 14:17:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:06,401 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:06,401 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] [2021-05-03 14:17:06,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-03 14:17:06,619 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:06,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1187093435, now seen corresponding path program 4 times [2021-05-03 14:17:06,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:06,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991633241] [2021-05-03 14:17:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:06,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991633241] [2021-05-03 14:17:06,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865053342] [2021-05-03 14:17:06,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:06,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:17:06,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:06,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:06,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:06,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:06,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 14:17:06,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548363969] [2021-05-03 14:17:06,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:06,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:06,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:06,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:06,861 INFO L87 Difference]: Start difference. First operand 2800 states and 11219 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:07,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:07,066 INFO L93 Difference]: Finished difference Result 5607 states and 21463 transitions. [2021-05-03 14:17:07,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:17:07,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:07,092 INFO L225 Difference]: With dead ends: 5607 [2021-05-03 14:17:07,093 INFO L226 Difference]: Without dead ends: 5495 [2021-05-03 14:17:07,093 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:17:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2021-05-03 14:17:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 3696. [2021-05-03 14:17:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 3695 states have (on average 4.088227334235453) internal successors, (15106), 3695 states have internal predecessors, (15106), 0 states have call successors, (0), 0 states 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 14:17:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 15106 transitions. [2021-05-03 14:17:07,243 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 15106 transitions. Word has length 25 [2021-05-03 14:17:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:07,243 INFO L480 AbstractCegarLoop]: Abstraction has 3696 states and 15106 transitions. [2021-05-03 14:17:07,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 15106 transitions. [2021-05-03 14:17:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:07,252 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:07,252 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] [2021-05-03 14:17:07,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:07,471 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:07,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:07,472 INFO L82 PathProgramCache]: Analyzing trace with hash 204660801, now seen corresponding path program 5 times [2021-05-03 14:17:07,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:07,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951262222] [2021-05-03 14:17:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:07,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951262222] [2021-05-03 14:17:07,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125031842] [2021-05-03 14:17:07,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:17:07,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:17:07,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:07,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:07,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:07,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:07,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 14:17:07,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409984256] [2021-05-03 14:17:07,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:07,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:07,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:07,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:07,685 INFO L87 Difference]: Start difference. First operand 3696 states and 15106 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:07,889 INFO L93 Difference]: Finished difference Result 5302 states and 20641 transitions. [2021-05-03 14:17:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:17:07,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:07,904 INFO L225 Difference]: With dead ends: 5302 [2021-05-03 14:17:07,905 INFO L226 Difference]: Without dead ends: 5302 [2021-05-03 14:17:07,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:17:07,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2021-05-03 14:17:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 3659. [2021-05-03 14:17:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 4.064516129032258) internal successors, (14868), 3658 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states 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 14:17:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 14868 transitions. [2021-05-03 14:17:08,004 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 14868 transitions. Word has length 25 [2021-05-03 14:17:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:08,004 INFO L480 AbstractCegarLoop]: Abstraction has 3659 states and 14868 transitions. [2021-05-03 14:17:08,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 14868 transitions. [2021-05-03 14:17:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:08,013 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:08,013 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] [2021-05-03 14:17:08,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 14:17:08,229 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:08,229 INFO L82 PathProgramCache]: Analyzing trace with hash 651271677, now seen corresponding path program 6 times [2021-05-03 14:17:08,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:08,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490772441] [2021-05-03 14:17:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:08,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490772441] [2021-05-03 14:17:08,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738194674] [2021-05-03 14:17:08,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:08,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:17:08,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:08,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:08,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:08,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:08,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 14:17:08,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835690584] [2021-05-03 14:17:08,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:08,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:08,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:08,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:08,422 INFO L87 Difference]: Start difference. First operand 3659 states and 14868 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:08,624 INFO L93 Difference]: Finished difference Result 4788 states and 18687 transitions. [2021-05-03 14:17:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:17:08,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:08,637 INFO L225 Difference]: With dead ends: 4788 [2021-05-03 14:17:08,637 INFO L226 Difference]: Without dead ends: 4768 [2021-05-03 14:17:08,638 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:17:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-05-03 14:17:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 3665. [2021-05-03 14:17:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 4.060316593886463) internal successors, (14877), 3664 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states 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 14:17:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 14877 transitions. [2021-05-03 14:17:08,730 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 14877 transitions. Word has length 25 [2021-05-03 14:17:08,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:08,730 INFO L480 AbstractCegarLoop]: Abstraction has 3665 states and 14877 transitions. [2021-05-03 14:17:08,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 14877 transitions. [2021-05-03 14:17:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:08,739 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:08,739 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] [2021-05-03 14:17:08,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 14:17:08,958 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:08,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1201615291, now seen corresponding path program 7 times [2021-05-03 14:17:08,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:08,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067036304] [2021-05-03 14:17:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:09,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067036304] [2021-05-03 14:17:09,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354395426] [2021-05-03 14:17:09,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:09,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:09,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:09,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:09,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 14:17:09,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452074503] [2021-05-03 14:17:09,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:09,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:09,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:09,157 INFO L87 Difference]: Start difference. First operand 3665 states and 14877 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 14:17:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:09,336 INFO L93 Difference]: Finished difference Result 7954 states and 31437 transitions. [2021-05-03 14:17:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:17:09,337 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 25 [2021-05-03 14:17:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:09,356 INFO L225 Difference]: With dead ends: 7954 [2021-05-03 14:17:09,357 INFO L226 Difference]: Without dead ends: 7954 [2021-05-03 14:17:09,357 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:17:09,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2021-05-03 14:17:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 4610. [2021-05-03 14:17:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 4.175092210891734) internal successors, (19243), 4609 states have internal predecessors, (19243), 0 states have call successors, (0), 0 states 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 14:17:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 19243 transitions. [2021-05-03 14:17:09,542 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 19243 transitions. Word has length 25 [2021-05-03 14:17:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:09,542 INFO L480 AbstractCegarLoop]: Abstraction has 4610 states and 19243 transitions. [2021-05-03 14:17:09,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 14:17:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 19243 transitions. [2021-05-03 14:17:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:09,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:09,555 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] [2021-05-03 14:17:09,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 14:17:09,784 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:09,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1585751749, now seen corresponding path program 8 times [2021-05-03 14:17:09,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:09,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614843367] [2021-05-03 14:17:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:09,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614843367] [2021-05-03 14:17:09,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440336669] [2021-05-03 14:17:09,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:09,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:17:09,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:09,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:09,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:09,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:09,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 14:17:09,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556866204] [2021-05-03 14:17:09,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:09,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:09,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:09,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:09,906 INFO L87 Difference]: Start difference. First operand 4610 states and 19243 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:10,122 INFO L93 Difference]: Finished difference Result 6087 states and 24217 transitions. [2021-05-03 14:17:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:17:10,123 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:10,140 INFO L225 Difference]: With dead ends: 6087 [2021-05-03 14:17:10,140 INFO L226 Difference]: Without dead ends: 6059 [2021-05-03 14:17:10,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:17:10,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-05-03 14:17:10,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 4587. [2021-05-03 14:17:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4586 states have (on average 4.174662014827737) internal successors, (19145), 4586 states have internal predecessors, (19145), 0 states have call successors, (0), 0 states 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 14:17:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 19145 transitions. [2021-05-03 14:17:10,310 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 19145 transitions. Word has length 25 [2021-05-03 14:17:10,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:10,317 INFO L480 AbstractCegarLoop]: Abstraction has 4587 states and 19145 transitions. [2021-05-03 14:17:10,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 19145 transitions. [2021-05-03 14:17:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:10,343 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:10,343 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] [2021-05-03 14:17:10,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 14:17:10,559 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:10,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:10,559 INFO L82 PathProgramCache]: Analyzing trace with hash 526799169, now seen corresponding path program 9 times [2021-05-03 14:17:10,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:10,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85890451] [2021-05-03 14:17:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:10,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85890451] [2021-05-03 14:17:10,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402370875] [2021-05-03 14:17:10,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:10,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:17:10,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:10,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:10,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:10,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:10,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 14:17:10,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007687190] [2021-05-03 14:17:10,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:10,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:10,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:10,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:10,756 INFO L87 Difference]: Start difference. First operand 4587 states and 19145 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:11,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:11,007 INFO L93 Difference]: Finished difference Result 6950 states and 27646 transitions. [2021-05-03 14:17:11,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:17:11,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:11,040 INFO L225 Difference]: With dead ends: 6950 [2021-05-03 14:17:11,040 INFO L226 Difference]: Without dead ends: 6950 [2021-05-03 14:17:11,040 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:17:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2021-05-03 14:17:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 4669. [2021-05-03 14:17:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4668 states have (on average 4.1782347900599826) internal successors, (19504), 4668 states have internal predecessors, (19504), 0 states have call successors, (0), 0 states 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 14:17:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19504 transitions. [2021-05-03 14:17:11,164 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 19504 transitions. Word has length 25 [2021-05-03 14:17:11,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:11,164 INFO L480 AbstractCegarLoop]: Abstraction has 4669 states and 19504 transitions. [2021-05-03 14:17:11,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 19504 transitions. [2021-05-03 14:17:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:11,174 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:11,174 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] [2021-05-03 14:17:11,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:11,389 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:11,390 INFO L82 PathProgramCache]: Analyzing trace with hash 973410045, now seen corresponding path program 10 times [2021-05-03 14:17:11,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:11,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804177697] [2021-05-03 14:17:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:11,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804177697] [2021-05-03 14:17:11,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465601047] [2021-05-03 14:17:11,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:11,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:17:11,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:11,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:11,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:11,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:11,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 14:17:11,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163818649] [2021-05-03 14:17:11,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:11,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:11,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:11,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:11,626 INFO L87 Difference]: Start difference. First operand 4669 states and 19504 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:12,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:12,052 INFO L93 Difference]: Finished difference Result 7627 states and 29903 transitions. [2021-05-03 14:17:12,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:17:12,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:12,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:12,084 INFO L225 Difference]: With dead ends: 7627 [2021-05-03 14:17:12,084 INFO L226 Difference]: Without dead ends: 7607 [2021-05-03 14:17:12,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:17:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2021-05-03 14:17:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 4687. [2021-05-03 14:17:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 4.173068715322237) internal successors, (19555), 4686 states have internal predecessors, (19555), 0 states have call successors, (0), 0 states 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 14:17:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 19555 transitions. [2021-05-03 14:17:12,287 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 19555 transitions. Word has length 25 [2021-05-03 14:17:12,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:12,288 INFO L480 AbstractCegarLoop]: Abstraction has 4687 states and 19555 transitions. [2021-05-03 14:17:12,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 19555 transitions. [2021-05-03 14:17:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:12,315 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:12,315 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] [2021-05-03 14:17:12,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:12,531 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:12,531 INFO L82 PathProgramCache]: Analyzing trace with hash 258052741, now seen corresponding path program 11 times [2021-05-03 14:17:12,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:12,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046981218] [2021-05-03 14:17:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:12,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046981218] [2021-05-03 14:17:12,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176668725] [2021-05-03 14:17:12,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:17:12,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:17:12,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:12,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:12,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:12,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:12,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 14:17:12,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208910108] [2021-05-03 14:17:12,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:12,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:12,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:12,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:12,660 INFO L87 Difference]: Start difference. First operand 4687 states and 19555 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:12,989 INFO L93 Difference]: Finished difference Result 7378 states and 29710 transitions. [2021-05-03 14:17:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:17:12,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:13,010 INFO L225 Difference]: With dead ends: 7378 [2021-05-03 14:17:13,010 INFO L226 Difference]: Without dead ends: 7378 [2021-05-03 14:17:13,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:17:13,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-05-03 14:17:13,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 5057. [2021-05-03 14:17:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 4.166139240506329) internal successors, (21064), 5056 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states 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 14:17:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 21064 transitions. [2021-05-03 14:17:13,197 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 21064 transitions. Word has length 25 [2021-05-03 14:17:13,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:13,197 INFO L480 AbstractCegarLoop]: Abstraction has 5057 states and 21064 transitions. [2021-05-03 14:17:13,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 21064 transitions. [2021-05-03 14:17:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:13,213 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:13,213 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] [2021-05-03 14:17:13,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 14:17:13,429 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:13,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1577193245, now seen corresponding path program 12 times [2021-05-03 14:17:13,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:13,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094685562] [2021-05-03 14:17:13,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:13,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094685562] [2021-05-03 14:17:13,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48150501] [2021-05-03 14:17:13,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:13,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:17:13,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:13,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:13,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:13,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:13,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 14:17:13,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010871654] [2021-05-03 14:17:13,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:13,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:13,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:13,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:13,637 INFO L87 Difference]: Start difference. First operand 5057 states and 21064 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:13,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:13,840 INFO L93 Difference]: Finished difference Result 7943 states and 31115 transitions. [2021-05-03 14:17:13,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:17:13,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:13,858 INFO L225 Difference]: With dead ends: 7943 [2021-05-03 14:17:13,858 INFO L226 Difference]: Without dead ends: 7883 [2021-05-03 14:17:13,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:17:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2021-05-03 14:17:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 5255. [2021-05-03 14:17:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5255 states, 5254 states have (on average 4.142558051008756) internal successors, (21765), 5254 states have internal predecessors, (21765), 0 states have call successors, (0), 0 states 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 14:17:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 21765 transitions. [2021-05-03 14:17:13,972 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 21765 transitions. Word has length 25 [2021-05-03 14:17:13,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:13,972 INFO L480 AbstractCegarLoop]: Abstraction has 5255 states and 21765 transitions. [2021-05-03 14:17:13,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:13,972 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 21765 transitions. [2021-05-03 14:17:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:13,982 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:13,982 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] [2021-05-03 14:17:14,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:14,198 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:14,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:14,198 INFO L82 PathProgramCache]: Analyzing trace with hash -689659987, now seen corresponding path program 3 times [2021-05-03 14:17:14,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:14,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57303153] [2021-05-03 14:17:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:14,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57303153] [2021-05-03 14:17:14,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830961046] [2021-05-03 14:17:14,245 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 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 14:17:14,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:17:14,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:14,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:14,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:14,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:14,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 14:17:14,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371747674] [2021-05-03 14:17:14,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:14,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:14,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:14,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:14,469 INFO L87 Difference]: Start difference. First operand 5255 states and 21765 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:14,888 INFO L93 Difference]: Finished difference Result 15644 states and 64448 transitions. [2021-05-03 14:17:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:17:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:14,950 INFO L225 Difference]: With dead ends: 15644 [2021-05-03 14:17:14,950 INFO L226 Difference]: Without dead ends: 15644 [2021-05-03 14:17:14,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:17:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15644 states. [2021-05-03 14:17:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15644 to 7401. [2021-05-03 14:17:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7401 states, 7400 states have (on average 4.2628378378378375) internal successors, (31545), 7400 states have internal predecessors, (31545), 0 states have call successors, (0), 0 states 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 14:17:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7401 states to 7401 states and 31545 transitions. [2021-05-03 14:17:15,182 INFO L78 Accepts]: Start accepts. Automaton has 7401 states and 31545 transitions. Word has length 25 [2021-05-03 14:17:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:15,182 INFO L480 AbstractCegarLoop]: Abstraction has 7401 states and 31545 transitions. [2021-05-03 14:17:15,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:15,182 INFO L276 IsEmpty]: Start isEmpty. Operand 7401 states and 31545 transitions. [2021-05-03 14:17:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:15,200 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:15,200 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] [2021-05-03 14:17:15,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 14:17:15,416 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:15,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:15,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1695444781, now seen corresponding path program 4 times [2021-05-03 14:17:15,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:15,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249380234] [2021-05-03 14:17:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:15,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249380234] [2021-05-03 14:17:15,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807397072] [2021-05-03 14:17:15,442 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 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 14:17:15,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:17:15,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:15,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:15,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:15,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:15,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 14:17:15,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477490996] [2021-05-03 14:17:15,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:15,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:15,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:15,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:15,591 INFO L87 Difference]: Start difference. First operand 7401 states and 31545 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 14:17:15,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:15,895 INFO L93 Difference]: Finished difference Result 14414 states and 59525 transitions. [2021-05-03 14:17:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:17:15,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 14:17:15,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:15,941 INFO L225 Difference]: With dead ends: 14414 [2021-05-03 14:17:15,941 INFO L226 Difference]: Without dead ends: 14318 [2021-05-03 14:17:15,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:17:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14318 states. [2021-05-03 14:17:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14318 to 9947. [2021-05-03 14:17:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 4.3626583551176354) internal successors, (43391), 9946 states have internal predecessors, (43391), 0 states have call successors, (0), 0 states 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 14:17:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 43391 transitions. [2021-05-03 14:17:16,303 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 43391 transitions. Word has length 25 [2021-05-03 14:17:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:16,303 INFO L480 AbstractCegarLoop]: Abstraction has 9947 states and 43391 transitions. [2021-05-03 14:17:16,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 14:17:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 43391 transitions. [2021-05-03 14:17:16,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:16,324 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:16,324 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] [2021-05-03 14:17:16,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:16,540 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:16,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1517551827, now seen corresponding path program 5 times [2021-05-03 14:17:16,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:16,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892230157] [2021-05-03 14:17:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:16,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892230157] [2021-05-03 14:17:16,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141499498] [2021-05-03 14:17:16,585 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 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 14:17:16,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:17:16,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:16,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:16,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:16,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:16,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-03 14:17:16,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25299289] [2021-05-03 14:17:16,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:16,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:16,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:16,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:16,697 INFO L87 Difference]: Start difference. First operand 9947 states and 43391 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:17,075 INFO L93 Difference]: Finished difference Result 14334 states and 59778 transitions. [2021-05-03 14:17:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:17:17,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:17,116 INFO L225 Difference]: With dead ends: 14334 [2021-05-03 14:17:17,116 INFO L226 Difference]: Without dead ends: 14334 [2021-05-03 14:17:17,116 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:17:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14334 states. [2021-05-03 14:17:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14334 to 9809. [2021-05-03 14:17:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9809 states, 9808 states have (on average 4.337173735725938) internal successors, (42539), 9808 states have internal predecessors, (42539), 0 states have call successors, (0), 0 states 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 14:17:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9809 states to 9809 states and 42539 transitions. [2021-05-03 14:17:17,328 INFO L78 Accepts]: Start accepts. Automaton has 9809 states and 42539 transitions. Word has length 25 [2021-05-03 14:17:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:17,328 INFO L480 AbstractCegarLoop]: Abstraction has 9809 states and 42539 transitions. [2021-05-03 14:17:17,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:17,328 INFO L276 IsEmpty]: Start isEmpty. Operand 9809 states and 42539 transitions. [2021-05-03 14:17:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:17,345 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:17,345 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] [2021-05-03 14:17:17,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 14:17:17,546 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:17,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:17,546 INFO L82 PathProgramCache]: Analyzing trace with hash -528085147, now seen corresponding path program 6 times [2021-05-03 14:17:17,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:17,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654064233] [2021-05-03 14:17:17,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:17,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654064233] [2021-05-03 14:17:17,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352938888] [2021-05-03 14:17:17,569 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 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 14:17:17,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:17:17,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:17,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:17,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:17,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:17,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-03 14:17:17,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633875261] [2021-05-03 14:17:17,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:17,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:17,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:17,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:17,642 INFO L87 Difference]: Start difference. First operand 9809 states and 42539 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:17,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:17,925 INFO L93 Difference]: Finished difference Result 12691 states and 52781 transitions. [2021-05-03 14:17:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:17:17,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:17,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:17,961 INFO L225 Difference]: With dead ends: 12691 [2021-05-03 14:17:17,961 INFO L226 Difference]: Without dead ends: 12666 [2021-05-03 14:17:17,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:17:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12666 states. [2021-05-03 14:17:18,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12666 to 9875. [2021-05-03 14:17:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.332388089933158) internal successors, (42778), 9874 states have internal predecessors, (42778), 0 states have call successors, (0), 0 states 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 14:17:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42778 transitions. [2021-05-03 14:17:18,270 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42778 transitions. Word has length 25 [2021-05-03 14:17:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:18,270 INFO L480 AbstractCegarLoop]: Abstraction has 9875 states and 42778 transitions. [2021-05-03 14:17:18,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42778 transitions. [2021-05-03 14:17:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:18,288 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:18,288 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] [2021-05-03 14:17:18,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 14:17:18,489 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:18,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:18,490 INFO L82 PathProgramCache]: Analyzing trace with hash -592223003, now seen corresponding path program 7 times [2021-05-03 14:17:18,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:18,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106566582] [2021-05-03 14:17:18,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:18,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106566582] [2021-05-03 14:17:18,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812646580] [2021-05-03 14:17:18,557 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:17:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:18,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:18,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:18,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:18,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-03 14:17:18,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392450819] [2021-05-03 14:17:18,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:18,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:18,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:18,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:18,654 INFO L87 Difference]: Start difference. First operand 9875 states and 42778 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:18,850 INFO L93 Difference]: Finished difference Result 16572 states and 68392 transitions. [2021-05-03 14:17:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:17:18,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:18,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:18,904 INFO L225 Difference]: With dead ends: 16572 [2021-05-03 14:17:18,904 INFO L226 Difference]: Without dead ends: 16572 [2021-05-03 14:17:18,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:17:18,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16572 states. [2021-05-03 14:17:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16572 to 9875. [2021-05-03 14:17:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.3184119910877055) internal successors, (42640), 9874 states have internal predecessors, (42640), 0 states have call successors, (0), 0 states 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 14:17:19,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42640 transitions. [2021-05-03 14:17:19,431 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42640 transitions. Word has length 25 [2021-05-03 14:17:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:19,431 INFO L480 AbstractCegarLoop]: Abstraction has 9875 states and 42640 transitions. [2021-05-03 14:17:19,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42640 transitions. [2021-05-03 14:17:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:19,481 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:19,481 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] [2021-05-03 14:17:19,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 14:17:19,712 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:19,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:19,712 INFO L82 PathProgramCache]: Analyzing trace with hash -830186395, now seen corresponding path program 8 times [2021-05-03 14:17:19,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:19,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746784114] [2021-05-03 14:17:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:19,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746784114] [2021-05-03 14:17:19,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981172332] [2021-05-03 14:17:19,731 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 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 14:17:19,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:17:19,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:19,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:19,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:19,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:19,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-03 14:17:19,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514908004] [2021-05-03 14:17:19,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:19,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:19,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:19,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:19,799 INFO L87 Difference]: Start difference. First operand 9875 states and 42640 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:20,028 INFO L93 Difference]: Finished difference Result 13953 states and 57309 transitions. [2021-05-03 14:17:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:17:20,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:20,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:20,072 INFO L225 Difference]: With dead ends: 13953 [2021-05-03 14:17:20,072 INFO L226 Difference]: Without dead ends: 13929 [2021-05-03 14:17:20,073 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:17:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13929 states. [2021-05-03 14:17:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13929 to 9623. [2021-05-03 14:17:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9623 states, 9622 states have (on average 4.305757638744543) internal successors, (41430), 9622 states have internal predecessors, (41430), 0 states have call successors, (0), 0 states 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 14:17:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9623 states to 9623 states and 41430 transitions. [2021-05-03 14:17:20,462 INFO L78 Accepts]: Start accepts. Automaton has 9623 states and 41430 transitions. Word has length 25 [2021-05-03 14:17:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:20,462 INFO L480 AbstractCegarLoop]: Abstraction has 9623 states and 41430 transitions. [2021-05-03 14:17:20,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 9623 states and 41430 transitions. [2021-05-03 14:17:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:20,480 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:20,480 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] [2021-05-03 14:17:20,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-03 14:17:20,695 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:20,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1784284261, now seen corresponding path program 9 times [2021-05-03 14:17:20,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:20,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810082933] [2021-05-03 14:17:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:20,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810082933] [2021-05-03 14:17:20,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889533777] [2021-05-03 14:17:20,715 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 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 14:17:20,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:17:20,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:20,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:20,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:20,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-03 14:17:20,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840448129] [2021-05-03 14:17:20,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:20,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:20,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:20,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:20,794 INFO L87 Difference]: Start difference. First operand 9623 states and 41430 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:21,240 INFO L93 Difference]: Finished difference Result 16966 states and 70031 transitions. [2021-05-03 14:17:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:17:21,241 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:21,314 INFO L225 Difference]: With dead ends: 16966 [2021-05-03 14:17:21,314 INFO L226 Difference]: Without dead ends: 16966 [2021-05-03 14:17:21,314 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:17:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2021-05-03 14:17:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 9761. [2021-05-03 14:17:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.303893442622951) internal successors, (42006), 9760 states have internal predecessors, (42006), 0 states have call successors, (0), 0 states 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 14:17:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 42006 transitions. [2021-05-03 14:17:21,695 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 42006 transitions. Word has length 25 [2021-05-03 14:17:21,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:21,695 INFO L480 AbstractCegarLoop]: Abstraction has 9761 states and 42006 transitions. [2021-05-03 14:17:21,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 42006 transitions. [2021-05-03 14:17:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:21,725 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:21,725 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] [2021-05-03 14:17:21,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 14:17:21,926 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:21,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1521216355, now seen corresponding path program 10 times [2021-05-03 14:17:21,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:21,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804292184] [2021-05-03 14:17:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:21,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804292184] [2021-05-03 14:17:21,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99829613] [2021-05-03 14:17:21,996 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 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 14:17:22,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:17:22,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:22,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:22,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:22,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:22,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-03 14:17:22,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262593318] [2021-05-03 14:17:22,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:22,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:22,361 INFO L87 Difference]: Start difference. First operand 9761 states and 42006 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:22,581 INFO L93 Difference]: Finished difference Result 15336 states and 62550 transitions. [2021-05-03 14:17:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:17:22,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:17:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:22,620 INFO L225 Difference]: With dead ends: 15336 [2021-05-03 14:17:22,621 INFO L226 Difference]: Without dead ends: 15311 [2021-05-03 14:17:22,621 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:17:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15311 states. [2021-05-03 14:17:22,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15311 to 9761. [2021-05-03 14:17:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.30266393442623) internal successors, (41994), 9760 states have internal predecessors, (41994), 0 states have call successors, (0), 0 states 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 14:17:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 41994 transitions. [2021-05-03 14:17:23,040 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 41994 transitions. Word has length 25 [2021-05-03 14:17:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:23,041 INFO L480 AbstractCegarLoop]: Abstraction has 9761 states and 41994 transitions. [2021-05-03 14:17:23,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 41994 transitions. [2021-05-03 14:17:23,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:23,204 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:23,205 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] [2021-05-03 14:17:23,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:23,417 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash 910029601, now seen corresponding path program 11 times [2021-05-03 14:17:23,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:23,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216320817] [2021-05-03 14:17:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:23,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216320817] [2021-05-03 14:17:23,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692693445] [2021-05-03 14:17:23,454 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 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 14:17:23,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:17:23,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:23,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:23,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:23,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:23,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 14:17:23,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230959100] [2021-05-03 14:17:23,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:23,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:23,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:23,550 INFO L87 Difference]: Start difference. First operand 9761 states and 41994 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 14:17:24,222 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-05-03 14:17:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:24,484 INFO L93 Difference]: Finished difference Result 16139 states and 67397 transitions. [2021-05-03 14:17:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:17:24,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 14:17:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:24,537 INFO L225 Difference]: With dead ends: 16139 [2021-05-03 14:17:24,537 INFO L226 Difference]: Without dead ends: 16139 [2021-05-03 14:17:24,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:17:24,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2021-05-03 14:17:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 10624. [2021-05-03 14:17:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10624 states, 10623 states have (on average 4.260284288807305) internal successors, (45257), 10623 states have internal predecessors, (45257), 0 states have call successors, (0), 0 states 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 14:17:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10624 states to 10624 states and 45257 transitions. [2021-05-03 14:17:24,922 INFO L78 Accepts]: Start accepts. Automaton has 10624 states and 45257 transitions. Word has length 25 [2021-05-03 14:17:24,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:24,923 INFO L480 AbstractCegarLoop]: Abstraction has 10624 states and 45257 transitions. [2021-05-03 14:17:24,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 14:17:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 10624 states and 45257 transitions. [2021-05-03 14:17:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:17:24,946 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:24,946 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] [2021-05-03 14:17:25,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-03 14:17:25,161 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1776293839, now seen corresponding path program 12 times [2021-05-03 14:17:25,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:25,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587848419] [2021-05-03 14:17:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:25,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587848419] [2021-05-03 14:17:25,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63190276] [2021-05-03 14:17:25,200 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 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 14:17:25,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:17:25,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:17:25,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:25,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:25,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 14:17:25,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379051091] [2021-05-03 14:17:25,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:25,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:25,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:25,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:25,361 INFO L87 Difference]: Start difference. First operand 10624 states and 45257 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 14:17:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:25,575 INFO L93 Difference]: Finished difference Result 15510 states and 62671 transitions. [2021-05-03 14:17:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:17:25,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 14:17:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:25,617 INFO L225 Difference]: With dead ends: 15510 [2021-05-03 14:17:25,617 INFO L226 Difference]: Without dead ends: 15419 [2021-05-03 14:17:25,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:17:25,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15419 states. [2021-05-03 14:17:25,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15419 to 11124. [2021-05-03 14:17:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11124 states, 11123 states have (on average 4.2321316191674905) internal successors, (47074), 11123 states have internal predecessors, (47074), 0 states have call successors, (0), 0 states 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 14:17:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11124 states to 11124 states and 47074 transitions. [2021-05-03 14:17:25,970 INFO L78 Accepts]: Start accepts. Automaton has 11124 states and 47074 transitions. Word has length 25 [2021-05-03 14:17:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:25,971 INFO L480 AbstractCegarLoop]: Abstraction has 11124 states and 47074 transitions. [2021-05-03 14:17:25,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 14:17:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 11124 states and 47074 transitions. [2021-05-03 14:17:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:25,993 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:25,993 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] [2021-05-03 14:17:26,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:26,201 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:26,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:26,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2131213767, now seen corresponding path program 13 times [2021-05-03 14:17:26,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:26,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417496587] [2021-05-03 14:17:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:26,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417496587] [2021-05-03 14:17:26,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051621771] [2021-05-03 14:17:26,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:17:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:26,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:26,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:26,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:26,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-05-03 14:17:26,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619417350] [2021-05-03 14:17:26,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:26,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:26,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:26,496 INFO L87 Difference]: Start difference. First operand 11124 states and 47074 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:26,735 INFO L93 Difference]: Finished difference Result 12725 states and 52883 transitions. [2021-05-03 14:17:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:17:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 14:17:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:26,772 INFO L225 Difference]: With dead ends: 12725 [2021-05-03 14:17:26,773 INFO L226 Difference]: Without dead ends: 12657 [2021-05-03 14:17:26,773 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12657 states. [2021-05-03 14:17:27,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12657 to 11743. [2021-05-03 14:17:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 4.222619655935956) internal successors, (49582), 11742 states have internal predecessors, (49582), 0 states have call successors, (0), 0 states 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 14:17:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 49582 transitions. [2021-05-03 14:17:27,100 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 49582 transitions. Word has length 27 [2021-05-03 14:17:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:27,100 INFO L480 AbstractCegarLoop]: Abstraction has 11743 states and 49582 transitions. [2021-05-03 14:17:27,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 49582 transitions. [2021-05-03 14:17:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:27,121 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:27,121 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] [2021-05-03 14:17:27,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-03 14:17:27,322 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:27,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2098443779, now seen corresponding path program 14 times [2021-05-03 14:17:27,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:27,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072884770] [2021-05-03 14:17:27,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:17:27,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072884770] [2021-05-03 14:17:27,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134933150] [2021-05-03 14:17:27,391 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 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 14:17:27,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:17:27,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:27,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:27,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:27,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:27,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-05-03 14:17:27,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354179920] [2021-05-03 14:17:27,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:27,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:27,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:27,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:27,536 INFO L87 Difference]: Start difference. First operand 11743 states and 49582 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:27,830 INFO L93 Difference]: Finished difference Result 13435 states and 55712 transitions. [2021-05-03 14:17:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:17:27,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 14:17:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:27,866 INFO L225 Difference]: With dead ends: 13435 [2021-05-03 14:17:27,867 INFO L226 Difference]: Without dead ends: 13299 [2021-05-03 14:17:27,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:27,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2021-05-03 14:17:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 11989. [2021-05-03 14:17:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11989 states, 11988 states have (on average 4.226976976976977) internal successors, (50673), 11988 states have internal predecessors, (50673), 0 states have call successors, (0), 0 states 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 14:17:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11989 states to 11989 states and 50673 transitions. [2021-05-03 14:17:28,217 INFO L78 Accepts]: Start accepts. Automaton has 11989 states and 50673 transitions. Word has length 27 [2021-05-03 14:17:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:28,218 INFO L480 AbstractCegarLoop]: Abstraction has 11989 states and 50673 transitions. [2021-05-03 14:17:28,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 11989 states and 50673 transitions. [2021-05-03 14:17:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:28,240 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:28,240 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] [2021-05-03 14:17:28,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-03 14:17:28,441 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:28,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1122467331, now seen corresponding path program 1 times [2021-05-03 14:17:28,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:28,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776862939] [2021-05-03 14:17:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:28,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776862939] [2021-05-03 14:17:28,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358602994] [2021-05-03 14:17:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:28,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:28,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:28,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:28,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-05-03 14:17:28,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33943803] [2021-05-03 14:17:28,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:28,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:28,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:28,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:28,742 INFO L87 Difference]: Start difference. First operand 11989 states and 50673 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:29,063 INFO L93 Difference]: Finished difference Result 12852 states and 53545 transitions. [2021-05-03 14:17:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:17:29,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 14:17:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:29,101 INFO L225 Difference]: With dead ends: 12852 [2021-05-03 14:17:29,101 INFO L226 Difference]: Without dead ends: 12484 [2021-05-03 14:17:29,101 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:29,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-05-03 14:17:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12212. [2021-05-03 14:17:29,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12212 states, 12211 states have (on average 4.207108344934895) internal successors, (51373), 12211 states have internal predecessors, (51373), 0 states have call successors, (0), 0 states 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 14:17:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12212 states to 12212 states and 51373 transitions. [2021-05-03 14:17:29,428 INFO L78 Accepts]: Start accepts. Automaton has 12212 states and 51373 transitions. Word has length 27 [2021-05-03 14:17:29,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:29,428 INFO L480 AbstractCegarLoop]: Abstraction has 12212 states and 51373 transitions. [2021-05-03 14:17:29,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 12212 states and 51373 transitions. [2021-05-03 14:17:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:29,450 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:29,450 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] [2021-05-03 14:17:29,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 14:17:29,653 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:29,653 INFO L82 PathProgramCache]: Analyzing trace with hash 420707279, now seen corresponding path program 2 times [2021-05-03 14:17:29,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:29,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884893110] [2021-05-03 14:17:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:29,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884893110] [2021-05-03 14:17:29,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945223133] [2021-05-03 14:17:29,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:29,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:17:29,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:29,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:29,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:29,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-05-03 14:17:29,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541135754] [2021-05-03 14:17:29,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:29,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:29,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:29,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:29,858 INFO L87 Difference]: Start difference. First operand 12212 states and 51373 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:30,106 INFO L93 Difference]: Finished difference Result 12962 states and 53969 transitions. [2021-05-03 14:17:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:17:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 14:17:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:30,139 INFO L225 Difference]: With dead ends: 12962 [2021-05-03 14:17:30,139 INFO L226 Difference]: Without dead ends: 12648 [2021-05-03 14:17:30,139 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:30,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12648 states. [2021-05-03 14:17:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12648 to 12240. [2021-05-03 14:17:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12240 states, 12239 states have (on average 4.2166026636163085) internal successors, (51607), 12239 states have internal predecessors, (51607), 0 states have call successors, (0), 0 states 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 14:17:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12240 states to 12240 states and 51607 transitions. [2021-05-03 14:17:30,521 INFO L78 Accepts]: Start accepts. Automaton has 12240 states and 51607 transitions. Word has length 27 [2021-05-03 14:17:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:30,521 INFO L480 AbstractCegarLoop]: Abstraction has 12240 states and 51607 transitions. [2021-05-03 14:17:30,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 12240 states and 51607 transitions. [2021-05-03 14:17:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:30,546 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:30,546 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] [2021-05-03 14:17:30,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 14:17:30,746 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1375497597, now seen corresponding path program 3 times [2021-05-03 14:17:30,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:30,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772176125] [2021-05-03 14:17:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:30,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772176125] [2021-05-03 14:17:30,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452154273] [2021-05-03 14:17:30,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:30,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:17:30,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:30,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:30,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:30,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:30,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-05-03 14:17:30,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046025066] [2021-05-03 14:17:30,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:30,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:30,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:30,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:30,921 INFO L87 Difference]: Start difference. First operand 12240 states and 51607 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 14:17:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:31,131 INFO L93 Difference]: Finished difference Result 12764 states and 53549 transitions. [2021-05-03 14:17:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:17:31,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 27 [2021-05-03 14:17:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:31,164 INFO L225 Difference]: With dead ends: 12764 [2021-05-03 14:17:31,165 INFO L226 Difference]: Without dead ends: 12616 [2021-05-03 14:17:31,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12616 states. [2021-05-03 14:17:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12616 to 12484. [2021-05-03 14:17:31,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12484 states, 12483 states have (on average 4.215893615316831) internal successors, (52627), 12483 states have internal predecessors, (52627), 0 states have call successors, (0), 0 states 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 14:17:31,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12484 states to 12484 states and 52627 transitions. [2021-05-03 14:17:31,525 INFO L78 Accepts]: Start accepts. Automaton has 12484 states and 52627 transitions. Word has length 27 [2021-05-03 14:17:31,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:31,525 INFO L480 AbstractCegarLoop]: Abstraction has 12484 states and 52627 transitions. [2021-05-03 14:17:31,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 14:17:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 12484 states and 52627 transitions. [2021-05-03 14:17:31,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:31,550 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:31,550 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] [2021-05-03 14:17:31,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 14:17:31,750 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:31,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:31,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1170257385, now seen corresponding path program 4 times [2021-05-03 14:17:31,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:31,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653172941] [2021-05-03 14:17:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:31,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653172941] [2021-05-03 14:17:31,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292509372] [2021-05-03 14:17:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:31,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:17:31,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:31,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:31,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:31,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:31,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-05-03 14:17:31,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816375828] [2021-05-03 14:17:31,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:31,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:31,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:31,949 INFO L87 Difference]: Start difference. First operand 12484 states and 52627 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:17:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:32,227 INFO L93 Difference]: Finished difference Result 13344 states and 55451 transitions. [2021-05-03 14:17:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:17:32,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2021-05-03 14:17:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:32,263 INFO L225 Difference]: With dead ends: 13344 [2021-05-03 14:17:32,264 INFO L226 Difference]: Without dead ends: 12916 [2021-05-03 14:17:32,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12916 states. [2021-05-03 14:17:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12916 to 12072. [2021-05-03 14:17:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12072 states, 12071 states have (on average 4.212327064866209) internal successors, (50847), 12071 states have internal predecessors, (50847), 0 states have call successors, (0), 0 states 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 14:17:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12072 states to 12072 states and 50847 transitions. [2021-05-03 14:17:32,649 INFO L78 Accepts]: Start accepts. Automaton has 12072 states and 50847 transitions. Word has length 27 [2021-05-03 14:17:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:32,649 INFO L480 AbstractCegarLoop]: Abstraction has 12072 states and 50847 transitions. [2021-05-03 14:17:32,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:17:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 12072 states and 50847 transitions. [2021-05-03 14:17:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:32,673 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:32,673 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] [2021-05-03 14:17:32,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:32,874 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:32,874 INFO L82 PathProgramCache]: Analyzing trace with hash 411566663, now seen corresponding path program 5 times [2021-05-03 14:17:32,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:32,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547876116] [2021-05-03 14:17:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:32,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547876116] [2021-05-03 14:17:32,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144693548] [2021-05-03 14:17:32,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:17:32,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:17:32,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:32,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:32,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:33,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:33,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-05-03 14:17:33,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483554256] [2021-05-03 14:17:33,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:33,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:33,042 INFO L87 Difference]: Start difference. First operand 12072 states and 50847 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 14:17:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:33,331 INFO L93 Difference]: Finished difference Result 12692 states and 53003 transitions. [2021-05-03 14:17:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:17:33,331 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 27 [2021-05-03 14:17:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:33,365 INFO L225 Difference]: With dead ends: 12692 [2021-05-03 14:17:33,365 INFO L226 Difference]: Without dead ends: 12544 [2021-05-03 14:17:33,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:33,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12544 states. [2021-05-03 14:17:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12544 to 12224. [2021-05-03 14:17:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12224 states, 12223 states have (on average 4.211813793667676) internal successors, (51481), 12223 states have internal predecessors, (51481), 0 states have call successors, (0), 0 states 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 14:17:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12224 states to 12224 states and 51481 transitions. [2021-05-03 14:17:33,594 INFO L78 Accepts]: Start accepts. Automaton has 12224 states and 51481 transitions. Word has length 27 [2021-05-03 14:17:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:33,594 INFO L480 AbstractCegarLoop]: Abstraction has 12224 states and 51481 transitions. [2021-05-03 14:17:33,594 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 14:17:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 12224 states and 51481 transitions. [2021-05-03 14:17:33,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:33,617 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:33,617 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] [2021-05-03 14:17:33,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 14:17:33,818 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1678002305, now seen corresponding path program 6 times [2021-05-03 14:17:33,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:33,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188034388] [2021-05-03 14:17:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:33,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188034388] [2021-05-03 14:17:33,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19211861] [2021-05-03 14:17:33,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:33,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:17:33,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:33,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:33,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:34,039 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-05-03 14:17:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:34,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:34,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-05-03 14:17:34,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511364909] [2021-05-03 14:17:34,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:34,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:34,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:34,101 INFO L87 Difference]: Start difference. First operand 12224 states and 51481 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:34,376 INFO L93 Difference]: Finished difference Result 13227 states and 54835 transitions. [2021-05-03 14:17:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:17:34,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 14:17:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:34,413 INFO L225 Difference]: With dead ends: 13227 [2021-05-03 14:17:34,413 INFO L226 Difference]: Without dead ends: 12883 [2021-05-03 14:17:34,413 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12883 states. [2021-05-03 14:17:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12883 to 12275. [2021-05-03 14:17:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12275 states, 12274 states have (on average 4.194150236271794) internal successors, (51479), 12274 states have internal predecessors, (51479), 0 states have call successors, (0), 0 states 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 14:17:34,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12275 states to 12275 states and 51479 transitions. [2021-05-03 14:17:34,642 INFO L78 Accepts]: Start accepts. Automaton has 12275 states and 51479 transitions. Word has length 27 [2021-05-03 14:17:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:34,642 INFO L480 AbstractCegarLoop]: Abstraction has 12275 states and 51479 transitions. [2021-05-03 14:17:34,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 12275 states and 51479 transitions. [2021-05-03 14:17:34,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:34,666 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:34,666 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] [2021-05-03 14:17:34,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 14:17:34,866 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:34,867 INFO L82 PathProgramCache]: Analyzing trace with hash 264443651, now seen corresponding path program 7 times [2021-05-03 14:17:34,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:34,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193424026] [2021-05-03 14:17:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:17:34,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193424026] [2021-05-03 14:17:34,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:17:34,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:17:34,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312999741] [2021-05-03 14:17:34,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:17:34,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:17:34,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:34,906 INFO L87 Difference]: Start difference. First operand 12275 states and 51479 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 14:17:35,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:35,021 INFO L93 Difference]: Finished difference Result 12977 states and 53915 transitions. [2021-05-03 14:17:35,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:17:35,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 14:17:35,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:35,133 INFO L225 Difference]: With dead ends: 12977 [2021-05-03 14:17:35,134 INFO L226 Difference]: Without dead ends: 12779 [2021-05-03 14:17:35,134 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:17:35,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12779 states. [2021-05-03 14:17:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12779 to 12283. [2021-05-03 14:17:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12283 states, 12282 states have (on average 4.204934049829018) internal successors, (51645), 12282 states have internal predecessors, (51645), 0 states have call successors, (0), 0 states 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 14:17:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12283 states to 12283 states and 51645 transitions. [2021-05-03 14:17:35,396 INFO L78 Accepts]: Start accepts. Automaton has 12283 states and 51645 transitions. Word has length 27 [2021-05-03 14:17:35,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:35,396 INFO L480 AbstractCegarLoop]: Abstraction has 12283 states and 51645 transitions. [2021-05-03 14:17:35,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 14:17:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 12283 states and 51645 transitions. [2021-05-03 14:17:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:35,421 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:35,422 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] [2021-05-03 14:17:35,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-03 14:17:35,422 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:35,422 INFO L82 PathProgramCache]: Analyzing trace with hash 89085491, now seen corresponding path program 8 times [2021-05-03 14:17:35,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:35,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991482112] [2021-05-03 14:17:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:35,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991482112] [2021-05-03 14:17:35,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369740938] [2021-05-03 14:17:35,464 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 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 14:17:35,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:17:35,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:35,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:35,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-05-03 14:17:35,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307288445] [2021-05-03 14:17:35,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:35,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:35,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:35,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:35,615 INFO L87 Difference]: Start difference. First operand 12283 states and 51645 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 14:17:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:35,843 INFO L93 Difference]: Finished difference Result 12839 states and 53665 transitions. [2021-05-03 14:17:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:17:35,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 27 [2021-05-03 14:17:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:35,883 INFO L225 Difference]: With dead ends: 12839 [2021-05-03 14:17:35,884 INFO L226 Difference]: Without dead ends: 12707 [2021-05-03 14:17:35,884 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-05-03 14:17:36,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 12503. [2021-05-03 14:17:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12503 states, 12502 states have (on average 4.2051671732522795) internal successors, (52573), 12502 states have internal predecessors, (52573), 0 states have call successors, (0), 0 states 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 14:17:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12503 states to 12503 states and 52573 transitions. [2021-05-03 14:17:36,335 INFO L78 Accepts]: Start accepts. Automaton has 12503 states and 52573 transitions. Word has length 27 [2021-05-03 14:17:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:36,335 INFO L480 AbstractCegarLoop]: Abstraction has 12503 states and 52573 transitions. [2021-05-03 14:17:36,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 14:17:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 12503 states and 52573 transitions. [2021-05-03 14:17:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:36,365 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:36,365 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] [2021-05-03 14:17:36,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:36,581 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:36,581 INFO L82 PathProgramCache]: Analyzing trace with hash -576277937, now seen corresponding path program 9 times [2021-05-03 14:17:36,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:36,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994092217] [2021-05-03 14:17:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:17:36,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994092217] [2021-05-03 14:17:36,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609172692] [2021-05-03 14:17:36,668 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 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 14:17:36,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:17:36,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:36,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:36,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:36,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:36,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-05-03 14:17:36,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137973731] [2021-05-03 14:17:36,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:36,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:36,926 INFO L87 Difference]: Start difference. First operand 12503 states and 52573 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:17:37,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:37,400 INFO L93 Difference]: Finished difference Result 13523 states and 55911 transitions. [2021-05-03 14:17:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:17:37,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2021-05-03 14:17:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:37,442 INFO L225 Difference]: With dead ends: 13523 [2021-05-03 14:17:37,442 INFO L226 Difference]: Without dead ends: 13127 [2021-05-03 14:17:37,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2021-05-03 14:17:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 12123. [2021-05-03 14:17:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12123 states, 12122 states have (on average 4.2003794753341035) internal successors, (50917), 12122 states have internal predecessors, (50917), 0 states have call successors, (0), 0 states 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 14:17:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 50917 transitions. [2021-05-03 14:17:37,720 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 50917 transitions. Word has length 27 [2021-05-03 14:17:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:37,722 INFO L480 AbstractCegarLoop]: Abstraction has 12123 states and 50917 transitions. [2021-05-03 14:17:37,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:17:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 50917 transitions. [2021-05-03 14:17:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:38,042 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:38,042 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] [2021-05-03 14:17:38,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-03 14:17:38,243 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:38,243 INFO L82 PathProgramCache]: Analyzing trace with hash 438743171, now seen corresponding path program 15 times [2021-05-03 14:17:38,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:38,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124380204] [2021-05-03 14:17:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:17:38,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124380204] [2021-05-03 14:17:38,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044289939] [2021-05-03 14:17:38,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:17:38,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:17:38,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:38,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:38,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:38,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:38,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-05-03 14:17:38,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946698818] [2021-05-03 14:17:38,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:38,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:38,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:38,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:38,549 INFO L87 Difference]: Start difference. First operand 12123 states and 50917 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 14:17:38,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:38,784 INFO L93 Difference]: Finished difference Result 13671 states and 56537 transitions. [2021-05-03 14:17:38,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:17:38,785 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 27 [2021-05-03 14:17:38,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:38,844 INFO L225 Difference]: With dead ends: 13671 [2021-05-03 14:17:38,844 INFO L226 Difference]: Without dead ends: 13603 [2021-05-03 14:17:38,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:38,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13603 states. [2021-05-03 14:17:39,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13603 to 12633. [2021-05-03 14:17:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12633 states, 12632 states have (on average 4.193635212159594) internal successors, (52974), 12632 states have internal predecessors, (52974), 0 states have call successors, (0), 0 states 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 14:17:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12633 states to 12633 states and 52974 transitions. [2021-05-03 14:17:39,185 INFO L78 Accepts]: Start accepts. Automaton has 12633 states and 52974 transitions. Word has length 27 [2021-05-03 14:17:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:39,185 INFO L480 AbstractCegarLoop]: Abstraction has 12633 states and 52974 transitions. [2021-05-03 14:17:39,185 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 14:17:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 12633 states and 52974 transitions. [2021-05-03 14:17:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:39,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:39,216 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] [2021-05-03 14:17:39,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:39,433 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:39,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1734301265, now seen corresponding path program 13 times [2021-05-03 14:17:39,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:39,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675532094] [2021-05-03 14:17:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:39,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675532094] [2021-05-03 14:17:39,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895665565] [2021-05-03 14:17:39,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:39,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:39,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:39,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:39,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-05-03 14:17:39,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839757983] [2021-05-03 14:17:39,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:39,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:39,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:39,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:39,596 INFO L87 Difference]: Start difference. First operand 12633 states and 52974 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:39,913 INFO L93 Difference]: Finished difference Result 13876 states and 57371 transitions. [2021-05-03 14:17:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:17:39,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 14:17:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:39,961 INFO L225 Difference]: With dead ends: 13876 [2021-05-03 14:17:39,962 INFO L226 Difference]: Without dead ends: 13825 [2021-05-03 14:17:39,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:39,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2021-05-03 14:17:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13229. [2021-05-03 14:17:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13229 states, 13228 states have (on average 4.175839129120049) internal successors, (55238), 13228 states have internal predecessors, (55238), 0 states have call successors, (0), 0 states 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 14:17:40,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13229 states to 13229 states and 55238 transitions. [2021-05-03 14:17:40,280 INFO L78 Accepts]: Start accepts. Automaton has 13229 states and 55238 transitions. Word has length 27 [2021-05-03 14:17:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:40,280 INFO L480 AbstractCegarLoop]: Abstraction has 13229 states and 55238 transitions. [2021-05-03 14:17:40,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:40,280 INFO L276 IsEmpty]: Start isEmpty. Operand 13229 states and 55238 transitions. [2021-05-03 14:17:40,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:40,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:40,311 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] [2021-05-03 14:17:40,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-03 14:17:40,526 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:40,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:40,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1775250851, now seen corresponding path program 14 times [2021-05-03 14:17:40,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:40,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677409785] [2021-05-03 14:17:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:17:40,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677409785] [2021-05-03 14:17:40,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109586454] [2021-05-03 14:17:40,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:40,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:17:40,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:40,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:40,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:40,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:40,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-05-03 14:17:40,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319235943] [2021-05-03 14:17:40,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:17:40,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:40,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:17:40,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:40,830 INFO L87 Difference]: Start difference. First operand 13229 states and 55238 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:17:41,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:41,170 INFO L93 Difference]: Finished difference Result 14694 states and 60468 transitions. [2021-05-03 14:17:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:17:41,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2021-05-03 14:17:41,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:41,208 INFO L225 Difference]: With dead ends: 14694 [2021-05-03 14:17:41,208 INFO L226 Difference]: Without dead ends: 14592 [2021-05-03 14:17:41,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:17:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14592 states. [2021-05-03 14:17:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14592 to 13580. [2021-05-03 14:17:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13580 states, 13579 states have (on average 4.172472199720156) internal successors, (56658), 13579 states have internal predecessors, (56658), 0 states have call successors, (0), 0 states 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 14:17:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13580 states to 13580 states and 56658 transitions. [2021-05-03 14:17:41,683 INFO L78 Accepts]: Start accepts. Automaton has 13580 states and 56658 transitions. Word has length 27 [2021-05-03 14:17:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:41,683 INFO L480 AbstractCegarLoop]: Abstraction has 13580 states and 56658 transitions. [2021-05-03 14:17:41,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:17:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 13580 states and 56658 transitions. [2021-05-03 14:17:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:17:41,715 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:41,715 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] [2021-05-03 14:17:41,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 14:17:41,932 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:41,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1792935773, now seen corresponding path program 15 times [2021-05-03 14:17:41,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:41,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076693795] [2021-05-03 14:17:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:17:42,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076693795] [2021-05-03 14:17:42,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215000395] [2021-05-03 14:17:42,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:42,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:17:42,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:42,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:17:42,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:42,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:42,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-05-03 14:17:42,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107150189] [2021-05-03 14:17:42,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:17:42,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:42,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:17:42,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:42,230 INFO L87 Difference]: Start difference. First operand 13580 states and 56658 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:42,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:42,460 INFO L93 Difference]: Finished difference Result 14707 states and 60689 transitions. [2021-05-03 14:17:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:17:42,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 14:17:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:42,507 INFO L225 Difference]: With dead ends: 14707 [2021-05-03 14:17:42,508 INFO L226 Difference]: Without dead ends: 14656 [2021-05-03 14:17:42,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:17:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14656 states. [2021-05-03 14:17:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14656 to 14011. [2021-05-03 14:17:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14011 states, 14010 states have (on average 4.164596716630978) internal successors, (58346), 14010 states have internal predecessors, (58346), 0 states have call successors, (0), 0 states 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 14:17:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14011 states to 14011 states and 58346 transitions. [2021-05-03 14:17:42,996 INFO L78 Accepts]: Start accepts. Automaton has 14011 states and 58346 transitions. Word has length 27 [2021-05-03 14:17:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:42,998 INFO L480 AbstractCegarLoop]: Abstraction has 14011 states and 58346 transitions. [2021-05-03 14:17:42,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 14011 states and 58346 transitions. [2021-05-03 14:17:43,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:17:43,032 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:43,033 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:43,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-03 14:17:43,248 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash -136266039, now seen corresponding path program 16 times [2021-05-03 14:17:43,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:43,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923896682] [2021-05-03 14:17:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:43,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923896682] [2021-05-03 14:17:43,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045036968] [2021-05-03 14:17:43,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:43,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:17:43,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:43,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:17:43,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:43,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:43,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:17:43,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064534783] [2021-05-03 14:17:43,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:17:43,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:43,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:17:43,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:17:43,515 INFO L87 Difference]: Start difference. First operand 14011 states and 58346 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:45,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:45,072 INFO L93 Difference]: Finished difference Result 35846 states and 143690 transitions. [2021-05-03 14:17:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 14:17:45,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:17:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:45,240 INFO L225 Difference]: With dead ends: 35846 [2021-05-03 14:17:45,240 INFO L226 Difference]: Without dead ends: 35846 [2021-05-03 14:17:45,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 567.3ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:17:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35846 states. [2021-05-03 14:17:45,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35846 to 13413. [2021-05-03 14:17:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13413 states, 13412 states have (on average 4.137339695794811) internal successors, (55490), 13412 states have internal predecessors, (55490), 0 states have call successors, (0), 0 states 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 14:17:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 55490 transitions. [2021-05-03 14:17:45,764 INFO L78 Accepts]: Start accepts. Automaton has 13413 states and 55490 transitions. Word has length 29 [2021-05-03 14:17:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:45,765 INFO L480 AbstractCegarLoop]: Abstraction has 13413 states and 55490 transitions. [2021-05-03 14:17:45,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 13413 states and 55490 transitions. [2021-05-03 14:17:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:17:45,796 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:45,796 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:46,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 14:17:46,012 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:46,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1909149495, now seen corresponding path program 17 times [2021-05-03 14:17:46,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:46,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892530937] [2021-05-03 14:17:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:46,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892530937] [2021-05-03 14:17:46,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340607529] [2021-05-03 14:17:46,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:46,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:17:46,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:46,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:17:46,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:46,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:46,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:17:46,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776116032] [2021-05-03 14:17:46,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:17:46,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:46,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:17:46,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:17:46,175 INFO L87 Difference]: Start difference. First operand 13413 states and 55490 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:47,022 INFO L93 Difference]: Finished difference Result 29402 states and 114209 transitions. [2021-05-03 14:17:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:17:47,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:17:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:47,125 INFO L225 Difference]: With dead ends: 29402 [2021-05-03 14:17:47,125 INFO L226 Difference]: Without dead ends: 29122 [2021-05-03 14:17:47,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:17:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-05-03 14:17:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 16597. [2021-05-03 14:17:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16597 states, 16596 states have (on average 4.1867317425885755) internal successors, (69483), 16596 states have internal predecessors, (69483), 0 states have call successors, (0), 0 states 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 14:17:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16597 states to 16597 states and 69483 transitions. [2021-05-03 14:17:47,619 INFO L78 Accepts]: Start accepts. Automaton has 16597 states and 69483 transitions. Word has length 29 [2021-05-03 14:17:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:47,619 INFO L480 AbstractCegarLoop]: Abstraction has 16597 states and 69483 transitions. [2021-05-03 14:17:47,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 16597 states and 69483 transitions. [2021-05-03 14:17:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:17:47,655 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:47,655 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:47,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:47,869 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:47,874 INFO L82 PathProgramCache]: Analyzing trace with hash -387959611, now seen corresponding path program 18 times [2021-05-03 14:17:47,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:47,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722395139] [2021-05-03 14:17:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:47,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722395139] [2021-05-03 14:17:47,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108413749] [2021-05-03 14:17:47,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:47,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:17:47,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:47,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:17:47,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:48,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:48,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-03 14:17:48,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832704007] [2021-05-03 14:17:48,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:17:48,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:48,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:17:48,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:17:48,058 INFO L87 Difference]: Start difference. First operand 16597 states and 69483 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:48,731 INFO L93 Difference]: Finished difference Result 29479 states and 115492 transitions. [2021-05-03 14:17:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:17:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:17:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:48,837 INFO L225 Difference]: With dead ends: 29479 [2021-05-03 14:17:48,838 INFO L226 Difference]: Without dead ends: 29479 [2021-05-03 14:17:48,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:17:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29479 states. [2021-05-03 14:17:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29479 to 16486. [2021-05-03 14:17:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16486 states, 16485 states have (on average 4.176038823172581) internal successors, (68842), 16485 states have internal predecessors, (68842), 0 states have call successors, (0), 0 states 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 14:17:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16486 states to 16486 states and 68842 transitions. [2021-05-03 14:17:49,356 INFO L78 Accepts]: Start accepts. Automaton has 16486 states and 68842 transitions. Word has length 29 [2021-05-03 14:17:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:49,356 INFO L480 AbstractCegarLoop]: Abstraction has 16486 states and 68842 transitions. [2021-05-03 14:17:49,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 16486 states and 68842 transitions. [2021-05-03 14:17:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:17:49,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:49,396 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:49,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 14:17:49,613 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash 58651265, now seen corresponding path program 19 times [2021-05-03 14:17:49,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:49,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140468868] [2021-05-03 14:17:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:49,797 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-05-03 14:17:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:49,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140468868] [2021-05-03 14:17:49,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789671108] [2021-05-03 14:17:49,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:49,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:17:49,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:50,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:50,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-03 14:17:50,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507601038] [2021-05-03 14:17:50,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:17:50,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:50,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:17:50,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:17:50,081 INFO L87 Difference]: Start difference. First operand 16486 states and 68842 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:50,576 INFO L93 Difference]: Finished difference Result 21742 states and 87217 transitions. [2021-05-03 14:17:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:17:50,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:17:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:50,648 INFO L225 Difference]: With dead ends: 21742 [2021-05-03 14:17:50,648 INFO L226 Difference]: Without dead ends: 21722 [2021-05-03 14:17:50,648 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 322.9ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:17:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21722 states. [2021-05-03 14:17:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21722 to 16564. [2021-05-03 14:17:51,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16564 states, 16563 states have (on average 4.172372154802874) internal successors, (69107), 16563 states have internal predecessors, (69107), 0 states have call successors, (0), 0 states 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 14:17:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16564 states to 16564 states and 69107 transitions. [2021-05-03 14:17:51,089 INFO L78 Accepts]: Start accepts. Automaton has 16564 states and 69107 transitions. Word has length 29 [2021-05-03 14:17:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:51,090 INFO L480 AbstractCegarLoop]: Abstraction has 16564 states and 69107 transitions. [2021-05-03 14:17:51,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 16564 states and 69107 transitions. [2021-05-03 14:17:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:17:51,294 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:51,294 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:51,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:51,506 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:51,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:51,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1828736635, now seen corresponding path program 20 times [2021-05-03 14:17:51,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:51,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882796022] [2021-05-03 14:17:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:51,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882796022] [2021-05-03 14:17:51,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699658244] [2021-05-03 14:17:51,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:51,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:17:51,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:51,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:17:51,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:51,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:51,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 14:17:51,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494997464] [2021-05-03 14:17:51,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:17:51,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:51,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:17:51,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:17:51,694 INFO L87 Difference]: Start difference. First operand 16564 states and 69107 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 14:17:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:52,548 INFO L93 Difference]: Finished difference Result 55537 states and 222253 transitions. [2021-05-03 14:17:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:17:52,549 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 29 [2021-05-03 14:17:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:52,780 INFO L225 Difference]: With dead ends: 55537 [2021-05-03 14:17:52,781 INFO L226 Difference]: Without dead ends: 55537 [2021-05-03 14:17:52,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 258.7ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:17:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55537 states. [2021-05-03 14:17:53,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55537 to 21381. [2021-05-03 14:17:53,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286623012160898) internal successors, (91648), 21380 states have internal predecessors, (91648), 0 states have call successors, (0), 0 states 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 14:17:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91648 transitions. [2021-05-03 14:17:53,989 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91648 transitions. Word has length 29 [2021-05-03 14:17:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:53,989 INFO L480 AbstractCegarLoop]: Abstraction has 21381 states and 91648 transitions. [2021-05-03 14:17:53,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 14:17:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91648 transitions. [2021-05-03 14:17:54,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:17:54,039 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:54,040 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:54,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:54,256 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash 958630405, now seen corresponding path program 21 times [2021-05-03 14:17:54,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:54,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320411597] [2021-05-03 14:17:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:54,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320411597] [2021-05-03 14:17:54,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868350560] [2021-05-03 14:17:54,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:54,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:17:54,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:54,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:17:54,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:54,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:54,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 14:17:54,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344108687] [2021-05-03 14:17:54,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:17:54,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:54,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:17:54,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:17:54,537 INFO L87 Difference]: Start difference. First operand 21381 states and 91648 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:55,332 INFO L93 Difference]: Finished difference Result 35555 states and 142585 transitions. [2021-05-03 14:17:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:17:55,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:17:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:55,451 INFO L225 Difference]: With dead ends: 35555 [2021-05-03 14:17:55,452 INFO L226 Difference]: Without dead ends: 35499 [2021-05-03 14:17:55,452 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:17:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35499 states. [2021-05-03 14:17:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35499 to 21381. [2021-05-03 14:17:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286155285313377) internal successors, (91638), 21380 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states 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 14:17:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91638 transitions. [2021-05-03 14:17:56,275 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91638 transitions. Word has length 29 [2021-05-03 14:17:56,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:56,275 INFO L480 AbstractCegarLoop]: Abstraction has 21381 states and 91638 transitions. [2021-05-03 14:17:56,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:56,275 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91638 transitions. [2021-05-03 14:17:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:17:56,330 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:56,330 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:56,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-03 14:17:56,533 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:56,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:56,534 INFO L82 PathProgramCache]: Analyzing trace with hash -100322175, now seen corresponding path program 22 times [2021-05-03 14:17:56,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:56,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024815283] [2021-05-03 14:17:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:56,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024815283] [2021-05-03 14:17:56,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028657159] [2021-05-03 14:17:56,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:56,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:17:56,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:17:56,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:56,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:56,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 14:17:56,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745128518] [2021-05-03 14:17:56,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:17:56,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:56,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:17:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:17:56,726 INFO L87 Difference]: Start difference. First operand 21381 states and 91638 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:17:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:57,501 INFO L93 Difference]: Finished difference Result 42043 states and 168835 transitions. [2021-05-03 14:17:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:17:57,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:17:57,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:57,639 INFO L225 Difference]: With dead ends: 42043 [2021-05-03 14:17:57,639 INFO L226 Difference]: Without dead ends: 42043 [2021-05-03 14:17:57,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:17:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42043 states. [2021-05-03 14:17:58,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42043 to 21474. [2021-05-03 14:17:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21474 states, 21473 states have (on average 4.284776230615191) internal successors, (92007), 21473 states have internal predecessors, (92007), 0 states have call successors, (0), 0 states 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 14:17:58,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21474 states to 21474 states and 92007 transitions. [2021-05-03 14:17:58,520 INFO L78 Accepts]: Start accepts. Automaton has 21474 states and 92007 transitions. Word has length 29 [2021-05-03 14:17:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:58,520 INFO L480 AbstractCegarLoop]: Abstraction has 21474 states and 92007 transitions. [2021-05-03 14:17:58,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:17:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 21474 states and 92007 transitions. [2021-05-03 14:17:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:17:58,575 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:58,575 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:58,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:58,775 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:58,776 INFO L82 PathProgramCache]: Analyzing trace with hash 346288701, now seen corresponding path program 23 times [2021-05-03 14:17:58,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:58,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058317434] [2021-05-03 14:17:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:58,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058317434] [2021-05-03 14:17:58,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740570679] [2021-05-03 14:17:58,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:58,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:17:58,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:58,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:17:58,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:58,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:58,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 14:17:58,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883215465] [2021-05-03 14:17:58,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:17:58,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:58,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:17:58,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:17:58,918 INFO L87 Difference]: Start difference. First operand 21474 states and 92007 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:17:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:59,725 INFO L93 Difference]: Finished difference Result 42315 states and 169746 transitions. [2021-05-03 14:17:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:17:59,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:17:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:59,864 INFO L225 Difference]: With dead ends: 42315 [2021-05-03 14:17:59,865 INFO L226 Difference]: Without dead ends: 42275 [2021-05-03 14:17:59,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:17:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42275 states. [2021-05-03 14:18:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42275 to 21484. [2021-05-03 14:18:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21484 states, 21483 states have (on average 4.284038542103058) internal successors, (92034), 21483 states have internal predecessors, (92034), 0 states have call successors, (0), 0 states 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 14:18:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 92034 transitions. [2021-05-03 14:18:00,460 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 92034 transitions. Word has length 29 [2021-05-03 14:18:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:00,460 INFO L480 AbstractCegarLoop]: Abstraction has 21484 states and 92034 transitions. [2021-05-03 14:18:00,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:18:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 92034 transitions. [2021-05-03 14:18:00,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:00,503 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:00,503 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:00,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-03 14:18:00,704 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:00,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:00,704 INFO L82 PathProgramCache]: Analyzing trace with hash -369068603, now seen corresponding path program 24 times [2021-05-03 14:18:00,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:00,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102167989] [2021-05-03 14:18:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:00,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102167989] [2021-05-03 14:18:00,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960095699] [2021-05-03 14:18:00,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:00,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:18:00,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:00,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:00,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:00,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:00,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:18:00,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430156274] [2021-05-03 14:18:00,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:18:00,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:00,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:18:00,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:18:00,849 INFO L87 Difference]: Start difference. First operand 21484 states and 92034 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 14:18:01,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:01,779 INFO L93 Difference]: Finished difference Result 36111 states and 146587 transitions. [2021-05-03 14:18:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:18:01,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:01,888 INFO L225 Difference]: With dead ends: 36111 [2021-05-03 14:18:01,888 INFO L226 Difference]: Without dead ends: 36111 [2021-05-03 14:18:01,888 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 468.6ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:18:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36111 states. [2021-05-03 14:18:02,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36111 to 20508. [2021-05-03 14:18:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20508 states, 20507 states have (on average 4.257131711123031) internal successors, (87301), 20507 states have internal predecessors, (87301), 0 states have call successors, (0), 0 states 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 14:18:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20508 states to 20508 states and 87301 transitions. [2021-05-03 14:18:02,580 INFO L78 Accepts]: Start accepts. Automaton has 20508 states and 87301 transitions. Word has length 29 [2021-05-03 14:18:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:02,580 INFO L480 AbstractCegarLoop]: Abstraction has 20508 states and 87301 transitions. [2021-05-03 14:18:02,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 14:18:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 20508 states and 87301 transitions. [2021-05-03 14:18:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:02,623 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:02,623 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:02,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:02,824 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:02,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2090652707, now seen corresponding path program 25 times [2021-05-03 14:18:02,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:02,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658342468] [2021-05-03 14:18:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658342468] [2021-05-03 14:18:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177269725] [2021-05-03 14:18:02,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:02,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:02,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:02,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:02,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:18:02,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466331138] [2021-05-03 14:18:02,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:18:02,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:18:02,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:18:02,978 INFO L87 Difference]: Start difference. First operand 20508 states and 87301 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 14:18:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:03,546 INFO L93 Difference]: Finished difference Result 36261 states and 145187 transitions. [2021-05-03 14:18:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:18:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:03,662 INFO L225 Difference]: With dead ends: 36261 [2021-05-03 14:18:03,662 INFO L226 Difference]: Without dead ends: 36201 [2021-05-03 14:18:03,662 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:18:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36201 states. [2021-05-03 14:18:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36201 to 20844. [2021-05-03 14:18:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20844 states, 20843 states have (on average 4.25269874778103) internal successors, (88639), 20843 states have internal predecessors, (88639), 0 states have call successors, (0), 0 states 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 14:18:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20844 states to 20844 states and 88639 transitions. [2021-05-03 14:18:04,432 INFO L78 Accepts]: Start accepts. Automaton has 20844 states and 88639 transitions. Word has length 29 [2021-05-03 14:18:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:04,432 INFO L480 AbstractCegarLoop]: Abstraction has 20844 states and 88639 transitions. [2021-05-03 14:18:04,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 14:18:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 20844 states and 88639 transitions. [2021-05-03 14:18:04,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:04,472 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:04,472 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:04,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-03 14:18:04,673 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:04,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:04,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1499343799, now seen corresponding path program 26 times [2021-05-03 14:18:04,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:04,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997753354] [2021-05-03 14:18:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:04,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997753354] [2021-05-03 14:18:04,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600284999] [2021-05-03 14:18:04,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:04,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:18:04,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:04,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:04,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:04,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:04,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:18:04,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132371594] [2021-05-03 14:18:04,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:18:04,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:04,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:18:04,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:18:04,839 INFO L87 Difference]: Start difference. First operand 20844 states and 88639 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:05,877 INFO L93 Difference]: Finished difference Result 44495 states and 179467 transitions. [2021-05-03 14:18:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:18:05,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:06,032 INFO L225 Difference]: With dead ends: 44495 [2021-05-03 14:18:06,033 INFO L226 Difference]: Without dead ends: 44495 [2021-05-03 14:18:06,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:18:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44495 states. [2021-05-03 14:18:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44495 to 20105. [2021-05-03 14:18:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20105 states, 20104 states have (on average 4.225875447672105) internal successors, (84957), 20104 states have internal predecessors, (84957), 0 states have call successors, (0), 0 states 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 14:18:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20105 states to 20105 states and 84957 transitions. [2021-05-03 14:18:06,618 INFO L78 Accepts]: Start accepts. Automaton has 20105 states and 84957 transitions. Word has length 29 [2021-05-03 14:18:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:06,619 INFO L480 AbstractCegarLoop]: Abstraction has 20105 states and 84957 transitions. [2021-05-03 14:18:06,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:06,619 INFO L276 IsEmpty]: Start isEmpty. Operand 20105 states and 84957 transitions. [2021-05-03 14:18:06,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:06,660 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:06,660 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:06,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-03 14:18:06,861 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:06,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1395756233, now seen corresponding path program 27 times [2021-05-03 14:18:06,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:06,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222561280] [2021-05-03 14:18:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:06,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222561280] [2021-05-03 14:18:06,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101165170] [2021-05-03 14:18:06,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:06,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:18:06,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:06,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:06,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:07,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:07,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:18:07,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908931118] [2021-05-03 14:18:07,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:18:07,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:07,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:18:07,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:18:07,039 INFO L87 Difference]: Start difference. First operand 20105 states and 84957 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 14:18:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:07,797 INFO L93 Difference]: Finished difference Result 29398 states and 116855 transitions. [2021-05-03 14:18:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:18:07,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:07,878 INFO L225 Difference]: With dead ends: 29398 [2021-05-03 14:18:07,878 INFO L226 Difference]: Without dead ends: 29314 [2021-05-03 14:18:07,878 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:18:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29314 states. [2021-05-03 14:18:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29314 to 19357. [2021-05-03 14:18:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19357 states, 19356 states have (on average 4.232434387270097) internal successors, (81923), 19356 states have internal predecessors, (81923), 0 states have call successors, (0), 0 states 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 14:18:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19357 states to 19357 states and 81923 transitions. [2021-05-03 14:18:08,314 INFO L78 Accepts]: Start accepts. Automaton has 19357 states and 81923 transitions. Word has length 29 [2021-05-03 14:18:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:08,314 INFO L480 AbstractCegarLoop]: Abstraction has 19357 states and 81923 transitions. [2021-05-03 14:18:08,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 14:18:08,314 INFO L276 IsEmpty]: Start isEmpty. Operand 19357 states and 81923 transitions. [2021-05-03 14:18:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:08,351 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:08,351 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:08,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-03 14:18:08,557 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:08,558 INFO L82 PathProgramCache]: Analyzing trace with hash 926813189, now seen corresponding path program 28 times [2021-05-03 14:18:08,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:08,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460071603] [2021-05-03 14:18:08,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:08,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460071603] [2021-05-03 14:18:08,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996914428] [2021-05-03 14:18:08,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:08,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:18:08,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:08,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:08,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:08,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:08,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-03 14:18:08,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459293207] [2021-05-03 14:18:08,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:18:08,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:08,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:18:08,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:18:08,677 INFO L87 Difference]: Start difference. First operand 19357 states and 81923 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:18:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:09,395 INFO L93 Difference]: Finished difference Result 39779 states and 158195 transitions. [2021-05-03 14:18:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:18:09,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:18:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:09,496 INFO L225 Difference]: With dead ends: 39779 [2021-05-03 14:18:09,496 INFO L226 Difference]: Without dead ends: 39779 [2021-05-03 14:18:09,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:18:09,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39779 states. [2021-05-03 14:18:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39779 to 20557. [2021-05-03 14:18:10,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20557 states, 20556 states have (on average 4.262502432379841) internal successors, (87620), 20556 states have internal predecessors, (87620), 0 states have call successors, (0), 0 states 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 14:18:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20557 states to 20557 states and 87620 transitions. [2021-05-03 14:18:10,234 INFO L78 Accepts]: Start accepts. Automaton has 20557 states and 87620 transitions. Word has length 29 [2021-05-03 14:18:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:10,234 INFO L480 AbstractCegarLoop]: Abstraction has 20557 states and 87620 transitions. [2021-05-03 14:18:10,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:18:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 20557 states and 87620 transitions. [2021-05-03 14:18:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:10,274 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:10,274 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:10,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-03 14:18:10,475 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:10,475 INFO L82 PathProgramCache]: Analyzing trace with hash -580787067, now seen corresponding path program 29 times [2021-05-03 14:18:10,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:10,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477897912] [2021-05-03 14:18:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:10,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477897912] [2021-05-03 14:18:10,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429850066] [2021-05-03 14:18:10,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:10,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:18:10,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:10,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:10,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:10,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:10,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-03 14:18:10,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780672517] [2021-05-03 14:18:10,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:18:10,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:10,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:18:10,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:18:10,601 INFO L87 Difference]: Start difference. First operand 20557 states and 87620 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 14:18:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:11,078 INFO L93 Difference]: Finished difference Result 27775 states and 112554 transitions. [2021-05-03 14:18:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:18:11,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:11,161 INFO L225 Difference]: With dead ends: 27775 [2021-05-03 14:18:11,161 INFO L226 Difference]: Without dead ends: 27747 [2021-05-03 14:18:11,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:18:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27747 states. [2021-05-03 14:18:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27747 to 20546. [2021-05-03 14:18:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20546 states, 20545 states have (on average 4.26186420053541) internal successors, (87560), 20545 states have internal predecessors, (87560), 0 states have call successors, (0), 0 states 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 14:18:11,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20546 states to 20546 states and 87560 transitions. [2021-05-03 14:18:11,857 INFO L78 Accepts]: Start accepts. Automaton has 20546 states and 87560 transitions. Word has length 29 [2021-05-03 14:18:11,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:11,857 INFO L480 AbstractCegarLoop]: Abstraction has 20546 states and 87560 transitions. [2021-05-03 14:18:11,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 14:18:11,858 INFO L276 IsEmpty]: Start isEmpty. Operand 20546 states and 87560 transitions. [2021-05-03 14:18:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:11,891 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:11,891 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:12,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:12,092 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:12,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:12,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1639739647, now seen corresponding path program 30 times [2021-05-03 14:18:12,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:12,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145311614] [2021-05-03 14:18:12,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:12,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145311614] [2021-05-03 14:18:12,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592805817] [2021-05-03 14:18:12,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:18:12,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:18:12,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:12,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:12,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:12,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:12,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-03 14:18:12,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970908144] [2021-05-03 14:18:12,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:18:12,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:18:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:18:12,208 INFO L87 Difference]: Start difference. First operand 20546 states and 87560 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 14:18:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:12,834 INFO L93 Difference]: Finished difference Result 31505 states and 127549 transitions. [2021-05-03 14:18:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:18:12,834 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2021-05-03 14:18:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:12,939 INFO L225 Difference]: With dead ends: 31505 [2021-05-03 14:18:12,939 INFO L226 Difference]: Without dead ends: 31505 [2021-05-03 14:18:12,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:18:12,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31505 states. [2021-05-03 14:18:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31505 to 20639. [2021-05-03 14:18:13,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.2605388119003775) internal successors, (87929), 20638 states have internal predecessors, (87929), 0 states have call successors, (0), 0 states 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 14:18:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87929 transitions. [2021-05-03 14:18:13,601 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87929 transitions. Word has length 29 [2021-05-03 14:18:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:13,601 INFO L480 AbstractCegarLoop]: Abstraction has 20639 states and 87929 transitions. [2021-05-03 14:18:13,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 14:18:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87929 transitions. [2021-05-03 14:18:13,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:13,638 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:13,638 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:13,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-05-03 14:18:13,839 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:13,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1193128771, now seen corresponding path program 31 times [2021-05-03 14:18:13,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:13,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757052155] [2021-05-03 14:18:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:13,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757052155] [2021-05-03 14:18:13,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693011882] [2021-05-03 14:18:13,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:13,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:13,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:13,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:13,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-03 14:18:13,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214560792] [2021-05-03 14:18:13,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:18:13,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:13,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:18:13,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:18:13,949 INFO L87 Difference]: Start difference. First operand 20639 states and 87929 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 14:18:14,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:14,460 INFO L93 Difference]: Finished difference Result 38173 states and 150936 transitions. [2021-05-03 14:18:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:18:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2021-05-03 14:18:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:14,556 INFO L225 Difference]: With dead ends: 38173 [2021-05-03 14:18:14,556 INFO L226 Difference]: Without dead ends: 38153 [2021-05-03 14:18:14,556 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:18:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38153 states. [2021-05-03 14:18:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38153 to 20639. [2021-05-03 14:18:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.260054268824499) internal successors, (87919), 20638 states have internal predecessors, (87919), 0 states have call successors, (0), 0 states 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 14:18:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87919 transitions. [2021-05-03 14:18:15,236 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87919 transitions. Word has length 29 [2021-05-03 14:18:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:15,236 INFO L480 AbstractCegarLoop]: Abstraction has 20639 states and 87919 transitions. [2021-05-03 14:18:15,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 14:18:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87919 transitions. [2021-05-03 14:18:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:15,275 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:15,275 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:15,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:15,475 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:15,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:15,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1908486075, now seen corresponding path program 32 times [2021-05-03 14:18:15,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:15,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554255745] [2021-05-03 14:18:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:15,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554255745] [2021-05-03 14:18:15,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271357983] [2021-05-03 14:18:15,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:18:15,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:18:15,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:15,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:15,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:15,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:15,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 14:18:15,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478220844] [2021-05-03 14:18:15,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:18:15,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:15,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:18:15,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:18:15,605 INFO L87 Difference]: Start difference. First operand 20639 states and 87919 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 14:18:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:17,025 INFO L93 Difference]: Finished difference Result 44621 states and 181666 transitions. [2021-05-03 14:18:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 14:18:17,026 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 29 [2021-05-03 14:18:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:17,164 INFO L225 Difference]: With dead ends: 44621 [2021-05-03 14:18:17,164 INFO L226 Difference]: Without dead ends: 44621 [2021-05-03 14:18:17,164 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 473.5ms TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 14:18:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44621 states. [2021-05-03 14:18:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44621 to 21011. [2021-05-03 14:18:17,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21011 states, 21010 states have (on average 4.254878629224179) internal successors, (89395), 21010 states have internal predecessors, (89395), 0 states have call successors, (0), 0 states 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 14:18:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 89395 transitions. [2021-05-03 14:18:17,885 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 89395 transitions. Word has length 29 [2021-05-03 14:18:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:17,885 INFO L480 AbstractCegarLoop]: Abstraction has 21011 states and 89395 transitions. [2021-05-03 14:18:17,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 14:18:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 89395 transitions. [2021-05-03 14:18:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:17,927 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:17,927 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:18,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:18,127 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:18,128 INFO L82 PathProgramCache]: Analyzing trace with hash 551235235, now seen corresponding path program 33 times [2021-05-03 14:18:18,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:18,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54575290] [2021-05-03 14:18:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:18,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54575290] [2021-05-03 14:18:18,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944535277] [2021-05-03 14:18:18,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:18,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:18:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:18,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:18,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:18,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:18,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 14:18:18,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233016611] [2021-05-03 14:18:18,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:18:18,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:18,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:18:18,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:18:18,410 INFO L87 Difference]: Start difference. First operand 21011 states and 89395 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 14:18:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:19,084 INFO L93 Difference]: Finished difference Result 44719 states and 175059 transitions. [2021-05-03 14:18:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:18:19,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 29 [2021-05-03 14:18:19,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:19,206 INFO L225 Difference]: With dead ends: 44719 [2021-05-03 14:18:19,207 INFO L226 Difference]: Without dead ends: 44519 [2021-05-03 14:18:19,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:18:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44519 states. [2021-05-03 14:18:19,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44519 to 21017. [2021-05-03 14:18:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21017 states, 21016 states have (on average 4.253235629996193) internal successors, (89386), 21016 states have internal predecessors, (89386), 0 states have call successors, (0), 0 states 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 14:18:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21017 states to 21017 states and 89386 transitions. [2021-05-03 14:18:19,925 INFO L78 Accepts]: Start accepts. Automaton has 21017 states and 89386 transitions. Word has length 29 [2021-05-03 14:18:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:19,925 INFO L480 AbstractCegarLoop]: Abstraction has 21017 states and 89386 transitions. [2021-05-03 14:18:19,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 14:18:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 21017 states and 89386 transitions. [2021-05-03 14:18:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:19,962 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:19,963 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:20,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:20,163 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:20,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1958174975, now seen corresponding path program 34 times [2021-05-03 14:18:20,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:20,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451978488] [2021-05-03 14:18:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:20,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451978488] [2021-05-03 14:18:20,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055776872] [2021-05-03 14:18:20,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:20,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:18:20,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:20,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:20,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:20,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:20,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:18:20,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976887317] [2021-05-03 14:18:20,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:18:20,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:20,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:18:20,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:18:20,305 INFO L87 Difference]: Start difference. First operand 21017 states and 89386 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 14:18:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:21,470 INFO L93 Difference]: Finished difference Result 38364 states and 158236 transitions. [2021-05-03 14:18:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 14:18:21,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 29 [2021-05-03 14:18:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:21,577 INFO L225 Difference]: With dead ends: 38364 [2021-05-03 14:18:21,577 INFO L226 Difference]: Without dead ends: 38344 [2021-05-03 14:18:21,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:18:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38344 states. [2021-05-03 14:18:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38344 to 21400. [2021-05-03 14:18:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21400 states, 21399 states have (on average 4.237441001915977) internal successors, (90677), 21399 states have internal predecessors, (90677), 0 states have call successors, (0), 0 states 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 14:18:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21400 states to 21400 states and 90677 transitions. [2021-05-03 14:18:22,276 INFO L78 Accepts]: Start accepts. Automaton has 21400 states and 90677 transitions. Word has length 29 [2021-05-03 14:18:22,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:22,276 INFO L480 AbstractCegarLoop]: Abstraction has 21400 states and 90677 transitions. [2021-05-03 14:18:22,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 14:18:22,276 INFO L276 IsEmpty]: Start isEmpty. Operand 21400 states and 90677 transitions. [2021-05-03 14:18:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:22,315 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:22,315 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:22,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:22,531 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:22,539 INFO L82 PathProgramCache]: Analyzing trace with hash 347304223, now seen corresponding path program 35 times [2021-05-03 14:18:22,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:22,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725356708] [2021-05-03 14:18:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:22,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725356708] [2021-05-03 14:18:22,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352971781] [2021-05-03 14:18:22,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:18:22,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:18:22,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:22,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:22,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:22,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:22,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:18:22,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809448280] [2021-05-03 14:18:22,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:18:22,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:22,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:18:22,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:18:22,751 INFO L87 Difference]: Start difference. First operand 21400 states and 90677 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 14:18:23,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:23,597 INFO L93 Difference]: Finished difference Result 37284 states and 146566 transitions. [2021-05-03 14:18:23,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:18:23,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 29 [2021-05-03 14:18:23,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:23,701 INFO L225 Difference]: With dead ends: 37284 [2021-05-03 14:18:23,701 INFO L226 Difference]: Without dead ends: 37184 [2021-05-03 14:18:23,701 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:18:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37184 states. [2021-05-03 14:18:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37184 to 21702. [2021-05-03 14:18:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21702 states, 21701 states have (on average 4.22432145984056) internal successors, (91672), 21701 states have internal predecessors, (91672), 0 states have call successors, (0), 0 states 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 14:18:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21702 states to 21702 states and 91672 transitions. [2021-05-03 14:18:24,239 INFO L78 Accepts]: Start accepts. Automaton has 21702 states and 91672 transitions. Word has length 29 [2021-05-03 14:18:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:24,239 INFO L480 AbstractCegarLoop]: Abstraction has 21702 states and 91672 transitions. [2021-05-03 14:18:24,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 14:18:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 21702 states and 91672 transitions. [2021-05-03 14:18:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:24,286 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:24,286 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:24,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 14:18:24,501 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:24,509 INFO L82 PathProgramCache]: Analyzing trace with hash 814631857, now seen corresponding path program 16 times [2021-05-03 14:18:24,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:24,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82821730] [2021-05-03 14:18:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:24,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82821730] [2021-05-03 14:18:24,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227972571] [2021-05-03 14:18:24,558 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:24,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:18:24,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:24,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:24,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:24,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:24,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:18:24,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830060546] [2021-05-03 14:18:24,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:18:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:18:24,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:18:24,750 INFO L87 Difference]: Start difference. First operand 21702 states and 91672 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:26,378 INFO L93 Difference]: Finished difference Result 62502 states and 262210 transitions. [2021-05-03 14:18:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:18:26,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:26,612 INFO L225 Difference]: With dead ends: 62502 [2021-05-03 14:18:26,612 INFO L226 Difference]: Without dead ends: 62502 [2021-05-03 14:18:26,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 510.9ms TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:18:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62502 states. [2021-05-03 14:18:27,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62502 to 25980. [2021-05-03 14:18:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25980 states, 25979 states have (on average 4.299280187844028) internal successors, (111691), 25979 states have internal predecessors, (111691), 0 states have call successors, (0), 0 states 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 14:18:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25980 states to 25980 states and 111691 transitions. [2021-05-03 14:18:27,737 INFO L78 Accepts]: Start accepts. Automaton has 25980 states and 111691 transitions. Word has length 29 [2021-05-03 14:18:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:27,737 INFO L480 AbstractCegarLoop]: Abstraction has 25980 states and 111691 transitions. [2021-05-03 14:18:27,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 25980 states and 111691 transitions. [2021-05-03 14:18:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:27,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:27,800 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:28,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:28,016 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash -612222159, now seen corresponding path program 17 times [2021-05-03 14:18:28,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:28,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978489251] [2021-05-03 14:18:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:28,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978489251] [2021-05-03 14:18:28,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301516744] [2021-05-03 14:18:28,088 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:28,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:18:28,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:28,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:28,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:28,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:28,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:18:28,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804356397] [2021-05-03 14:18:28,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:18:28,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:28,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:18:28,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:18:28,183 INFO L87 Difference]: Start difference. First operand 25980 states and 111691 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:29,344 INFO L93 Difference]: Finished difference Result 55112 states and 227311 transitions. [2021-05-03 14:18:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:18:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:29,657 INFO L225 Difference]: With dead ends: 55112 [2021-05-03 14:18:29,658 INFO L226 Difference]: Without dead ends: 54872 [2021-05-03 14:18:29,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:18:29,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54872 states. [2021-05-03 14:18:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54872 to 34226. [2021-05-03 14:18:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34226 states, 34225 states have (on average 4.397428780131483) internal successors, (150502), 34225 states have internal predecessors, (150502), 0 states have call successors, (0), 0 states 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 14:18:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34226 states to 34226 states and 150502 transitions. [2021-05-03 14:18:31,116 INFO L78 Accepts]: Start accepts. Automaton has 34226 states and 150502 transitions. Word has length 29 [2021-05-03 14:18:31,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:31,133 INFO L480 AbstractCegarLoop]: Abstraction has 34226 states and 150502 transitions. [2021-05-03 14:18:31,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:31,133 INFO L276 IsEmpty]: Start isEmpty. Operand 34226 states and 150502 transitions. [2021-05-03 14:18:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:31,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:31,243 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:31,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 14:18:31,465 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1900973263, now seen corresponding path program 18 times [2021-05-03 14:18:31,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:31,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857996937] [2021-05-03 14:18:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:31,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857996937] [2021-05-03 14:18:31,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633474189] [2021-05-03 14:18:31,517 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:18:31,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:18:31,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:31,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:31,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:31,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-03 14:18:31,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072883123] [2021-05-03 14:18:31,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:18:31,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:31,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:18:31,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:18:31,637 INFO L87 Difference]: Start difference. First operand 34226 states and 150502 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:32,390 INFO L93 Difference]: Finished difference Result 55218 states and 230451 transitions. [2021-05-03 14:18:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:18:32,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:32,628 INFO L225 Difference]: With dead ends: 55218 [2021-05-03 14:18:32,628 INFO L226 Difference]: Without dead ends: 55218 [2021-05-03 14:18:32,628 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:18:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55218 states. [2021-05-03 14:18:33,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55218 to 33975. [2021-05-03 14:18:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33975 states, 33974 states have (on average 4.384441043150645) internal successors, (148957), 33974 states have internal predecessors, (148957), 0 states have call successors, (0), 0 states 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 14:18:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33975 states to 33975 states and 148957 transitions. [2021-05-03 14:18:34,007 INFO L78 Accepts]: Start accepts. Automaton has 33975 states and 148957 transitions. Word has length 29 [2021-05-03 14:18:34,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:34,007 INFO L480 AbstractCegarLoop]: Abstraction has 33975 states and 148957 transitions. [2021-05-03 14:18:34,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:34,007 INFO L276 IsEmpty]: Start isEmpty. Operand 33975 states and 148957 transitions. [2021-05-03 14:18:34,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:34,095 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:34,095 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:34,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:34,311 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:34,311 INFO L82 PathProgramCache]: Analyzing trace with hash -911506583, now seen corresponding path program 19 times [2021-05-03 14:18:34,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:34,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766322541] [2021-05-03 14:18:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:34,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766322541] [2021-05-03 14:18:34,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280358183] [2021-05-03 14:18:34,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:18:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:34,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:34,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:34,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:34,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-03 14:18:34,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418196369] [2021-05-03 14:18:34,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:18:34,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:34,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:18:34,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:18:34,560 INFO L87 Difference]: Start difference. First operand 33975 states and 148957 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:35,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:35,523 INFO L93 Difference]: Finished difference Result 43486 states and 183757 transitions. [2021-05-03 14:18:35,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:18:35,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:35,693 INFO L225 Difference]: With dead ends: 43486 [2021-05-03 14:18:35,693 INFO L226 Difference]: Without dead ends: 43461 [2021-05-03 14:18:35,694 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:18:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43461 states. [2021-05-03 14:18:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43461 to 34031. [2021-05-03 14:18:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34031 states, 34030 states have (on average 4.383338230972671) internal successors, (149165), 34030 states have internal predecessors, (149165), 0 states have call successors, (0), 0 states 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 14:18:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34031 states to 34031 states and 149165 transitions. [2021-05-03 14:18:36,963 INFO L78 Accepts]: Start accepts. Automaton has 34031 states and 149165 transitions. Word has length 29 [2021-05-03 14:18:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:36,963 INFO L480 AbstractCegarLoop]: Abstraction has 34031 states and 149165 transitions. [2021-05-03 14:18:36,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 34031 states and 149165 transitions. [2021-05-03 14:18:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:37,105 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:37,105 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:37,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:37,321 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:37,321 INFO L82 PathProgramCache]: Analyzing trace with hash 755997349, now seen corresponding path program 20 times [2021-05-03 14:18:37,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:37,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294385751] [2021-05-03 14:18:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:37,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294385751] [2021-05-03 14:18:37,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26050379] [2021-05-03 14:18:37,362 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:37,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:18:37,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:37,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:37,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:37,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:37,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-03 14:18:37,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327849130] [2021-05-03 14:18:37,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:18:37,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:37,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:18:37,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:18:37,537 INFO L87 Difference]: Start difference. First operand 34031 states and 149165 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:38,578 INFO L93 Difference]: Finished difference Result 91021 states and 382461 transitions. [2021-05-03 14:18:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:18:38,579 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:38,926 INFO L225 Difference]: With dead ends: 91021 [2021-05-03 14:18:38,926 INFO L226 Difference]: Without dead ends: 91021 [2021-05-03 14:18:38,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:18:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91021 states. [2021-05-03 14:18:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91021 to 37194. [2021-05-03 14:18:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.447261581480386) internal successors, (165407), 37193 states have internal predecessors, (165407), 0 states have call successors, (0), 0 states 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 14:18:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165407 transitions. [2021-05-03 14:18:41,169 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165407 transitions. Word has length 29 [2021-05-03 14:18:41,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:41,169 INFO L480 AbstractCegarLoop]: Abstraction has 37194 states and 165407 transitions. [2021-05-03 14:18:41,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165407 transitions. [2021-05-03 14:18:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:41,252 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:41,252 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:41,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:41,465 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:41,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:41,465 INFO L82 PathProgramCache]: Analyzing trace with hash 518033957, now seen corresponding path program 21 times [2021-05-03 14:18:41,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:41,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328973168] [2021-05-03 14:18:41,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:41,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328973168] [2021-05-03 14:18:41,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365175459] [2021-05-03 14:18:41,512 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:41,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:18:41,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:41,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:41,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:41,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-03 14:18:41,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897173073] [2021-05-03 14:18:41,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:18:41,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:41,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:18:41,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:18:41,692 INFO L87 Difference]: Start difference. First operand 37194 states and 165407 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:18:42,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:42,479 INFO L93 Difference]: Finished difference Result 65131 states and 273960 transitions. [2021-05-03 14:18:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:18:42,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:18:42,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:42,679 INFO L225 Difference]: With dead ends: 65131 [2021-05-03 14:18:42,680 INFO L226 Difference]: Without dead ends: 65083 [2021-05-03 14:18:42,680 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:18:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2021-05-03 14:18:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 37194. [2021-05-03 14:18:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.446938940123141) internal successors, (165395), 37193 states have internal predecessors, (165395), 0 states have call successors, (0), 0 states 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 14:18:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165395 transitions. [2021-05-03 14:18:43,927 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165395 transitions. Word has length 29 [2021-05-03 14:18:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:43,927 INFO L480 AbstractCegarLoop]: Abstraction has 37194 states and 165395 transitions. [2021-05-03 14:18:43,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:18:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165395 transitions. [2021-05-03 14:18:44,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:44,001 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:44,001 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:44,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:44,201 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:44,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:44,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1162462683, now seen corresponding path program 22 times [2021-05-03 14:18:44,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:44,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101560597] [2021-05-03 14:18:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:44,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101560597] [2021-05-03 14:18:44,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989861343] [2021-05-03 14:18:44,243 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:44,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:18:44,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:44,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:44,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:44,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:44,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-03 14:18:44,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864483055] [2021-05-03 14:18:44,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:18:44,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:44,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:18:44,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:18:44,647 INFO L87 Difference]: Start difference. First operand 37194 states and 165395 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:18:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:45,575 INFO L93 Difference]: Finished difference Result 80813 states and 340534 transitions. [2021-05-03 14:18:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:18:45,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:18:45,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:45,832 INFO L225 Difference]: With dead ends: 80813 [2021-05-03 14:18:45,832 INFO L226 Difference]: Without dead ends: 80813 [2021-05-03 14:18:45,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:18:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80813 states. [2021-05-03 14:18:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80813 to 37432. [2021-05-03 14:18:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 4.445646656514653) internal successors, (166405), 37431 states have internal predecessors, (166405), 0 states have call successors, (0), 0 states 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 14:18:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 166405 transitions. [2021-05-03 14:18:47,303 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 166405 transitions. Word has length 29 [2021-05-03 14:18:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:47,304 INFO L480 AbstractCegarLoop]: Abstraction has 37432 states and 166405 transitions. [2021-05-03 14:18:47,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:18:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 166405 transitions. [2021-05-03 14:18:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:47,379 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:47,379 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:47,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-03 14:18:47,580 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash -172996003, now seen corresponding path program 23 times [2021-05-03 14:18:47,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:47,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320490900] [2021-05-03 14:18:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:47,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320490900] [2021-05-03 14:18:47,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455056985] [2021-05-03 14:18:47,600 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:47,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:18:47,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:47,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:47,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:47,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:47,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-03 14:18:47,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640872248] [2021-05-03 14:18:47,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:18:47,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:47,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:18:47,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:18:47,706 INFO L87 Difference]: Start difference. First operand 37432 states and 166405 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:48,627 INFO L93 Difference]: Finished difference Result 70173 states and 294528 transitions. [2021-05-03 14:18:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:18:48,628 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:48,860 INFO L225 Difference]: With dead ends: 70173 [2021-05-03 14:18:48,861 INFO L226 Difference]: Without dead ends: 70123 [2021-05-03 14:18:48,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:18:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70123 states. [2021-05-03 14:18:49,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70123 to 37432. [2021-05-03 14:18:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 4.445326066629264) internal successors, (166393), 37431 states have internal predecessors, (166393), 0 states have call successors, (0), 0 states 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 14:18:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 166393 transitions. [2021-05-03 14:18:50,032 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 166393 transitions. Word has length 29 [2021-05-03 14:18:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:50,032 INFO L480 AbstractCegarLoop]: Abstraction has 37432 states and 166393 transitions. [2021-05-03 14:18:50,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 166393 transitions. [2021-05-03 14:18:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:50,104 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:50,104 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:50,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:50,305 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:50,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2036717343, now seen corresponding path program 24 times [2021-05-03 14:18:50,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:50,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290674434] [2021-05-03 14:18:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:50,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290674434] [2021-05-03 14:18:50,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795316616] [2021-05-03 14:18:50,333 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:50,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:18:50,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:50,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:50,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:50,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:50,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 14:18:50,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612828923] [2021-05-03 14:18:50,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:18:50,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:18:50,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:18:50,463 INFO L87 Difference]: Start difference. First operand 37432 states and 166393 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 14:18:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:51,814 INFO L93 Difference]: Finished difference Result 71774 states and 303967 transitions. [2021-05-03 14:18:51,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:18:51,818 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 14:18:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:52,045 INFO L225 Difference]: With dead ends: 71774 [2021-05-03 14:18:52,046 INFO L226 Difference]: Without dead ends: 71774 [2021-05-03 14:18:52,046 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:18:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71774 states. [2021-05-03 14:18:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71774 to 35977. [2021-05-03 14:18:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35977 states, 35976 states have (on average 4.413970424727596) internal successors, (158797), 35976 states have internal predecessors, (158797), 0 states have call successors, (0), 0 states 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 14:18:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35977 states to 35977 states and 158797 transitions. [2021-05-03 14:18:53,296 INFO L78 Accepts]: Start accepts. Automaton has 35977 states and 158797 transitions. Word has length 29 [2021-05-03 14:18:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:53,296 INFO L480 AbstractCegarLoop]: Abstraction has 35977 states and 158797 transitions. [2021-05-03 14:18:53,296 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 14:18:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 35977 states and 158797 transitions. [2021-05-03 14:18:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:53,365 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:53,365 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:53,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:53,566 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:53,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:53,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1170453105, now seen corresponding path program 25 times [2021-05-03 14:18:53,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:53,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357074925] [2021-05-03 14:18:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:53,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357074925] [2021-05-03 14:18:53,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492405720] [2021-05-03 14:18:53,590 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:53,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:53,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:53,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:53,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 14:18:53,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680969096] [2021-05-03 14:18:53,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:18:53,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:53,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:18:53,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:18:53,698 INFO L87 Difference]: Start difference. First operand 35977 states and 158797 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:54,716 INFO L93 Difference]: Finished difference Result 58206 states and 243463 transitions. [2021-05-03 14:18:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:18:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:54,941 INFO L225 Difference]: With dead ends: 58206 [2021-05-03 14:18:54,941 INFO L226 Difference]: Without dead ends: 58131 [2021-05-03 14:18:54,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:18:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58131 states. [2021-05-03 14:18:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58131 to 36089. [2021-05-03 14:18:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36089 states, 36088 states have (on average 4.4117989359343825) internal successors, (159213), 36088 states have internal predecessors, (159213), 0 states have call successors, (0), 0 states 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 14:18:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36089 states to 36089 states and 159213 transitions. [2021-05-03 14:18:56,164 INFO L78 Accepts]: Start accepts. Automaton has 36089 states and 159213 transitions. Word has length 29 [2021-05-03 14:18:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:56,164 INFO L480 AbstractCegarLoop]: Abstraction has 36089 states and 159213 transitions. [2021-05-03 14:18:56,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 36089 states and 159213 transitions. [2021-05-03 14:18:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:56,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:56,243 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:56,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-03 14:18:56,447 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:56,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1678413033, now seen corresponding path program 26 times [2021-05-03 14:18:56,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:56,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806129845] [2021-05-03 14:18:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:56,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806129845] [2021-05-03 14:18:56,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369279121] [2021-05-03 14:18:56,481 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:18:56,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:18:56,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:56,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:56,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:56,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:56,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 14:18:56,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749723968] [2021-05-03 14:18:56,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:18:56,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:56,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:18:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:18:56,604 INFO L87 Difference]: Start difference. First operand 36089 states and 159213 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:18:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:57,603 INFO L93 Difference]: Finished difference Result 73446 states and 309536 transitions. [2021-05-03 14:18:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:18:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:18:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:57,830 INFO L225 Difference]: With dead ends: 73446 [2021-05-03 14:18:57,831 INFO L226 Difference]: Without dead ends: 73446 [2021-05-03 14:18:57,831 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:18:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73446 states. [2021-05-03 14:18:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73446 to 35349. [2021-05-03 14:18:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35349 states, 35348 states have (on average 4.388536833767115) internal successors, (155126), 35348 states have internal predecessors, (155126), 0 states have call successors, (0), 0 states 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 14:18:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35349 states to 35349 states and 155126 transitions. [2021-05-03 14:18:59,120 INFO L78 Accepts]: Start accepts. Automaton has 35349 states and 155126 transitions. Word has length 29 [2021-05-03 14:18:59,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:59,120 INFO L480 AbstractCegarLoop]: Abstraction has 35349 states and 155126 transitions. [2021-05-03 14:18:59,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:18:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 35349 states and 155126 transitions. [2021-05-03 14:18:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:18:59,198 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:59,198 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:59,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:59,399 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:59,399 INFO L82 PathProgramCache]: Analyzing trace with hash 628860009, now seen corresponding path program 27 times [2021-05-03 14:18:59,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:59,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882285563] [2021-05-03 14:18:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:59,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882285563] [2021-05-03 14:18:59,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364892595] [2021-05-03 14:18:59,423 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:59,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:18:59,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:18:59,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:59,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:59,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 14:18:59,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975065506] [2021-05-03 14:18:59,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:18:59,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:59,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:18:59,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:18:59,523 INFO L87 Difference]: Start difference. First operand 35349 states and 155126 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 14:19:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:00,468 INFO L93 Difference]: Finished difference Result 54059 states and 225007 transitions. [2021-05-03 14:19:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:19:00,468 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 14:19:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:00,630 INFO L225 Difference]: With dead ends: 54059 [2021-05-03 14:19:00,631 INFO L226 Difference]: Without dead ends: 53987 [2021-05-03 14:19:00,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:19:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53987 states. [2021-05-03 14:19:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53987 to 33989. [2021-05-03 14:19:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33989 states, 33988 states have (on average 4.398140520183595) internal successors, (149484), 33988 states have internal predecessors, (149484), 0 states have call successors, (0), 0 states 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 14:19:01,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33989 states to 33989 states and 149484 transitions. [2021-05-03 14:19:01,602 INFO L78 Accepts]: Start accepts. Automaton has 33989 states and 149484 transitions. Word has length 29 [2021-05-03 14:19:01,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:01,602 INFO L480 AbstractCegarLoop]: Abstraction has 33989 states and 149484 transitions. [2021-05-03 14:19:01,602 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 14:19:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 33989 states and 149484 transitions. [2021-05-03 14:19:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:19:01,666 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:01,666 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:01,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-03 14:19:01,866 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:01,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:01,867 INFO L82 PathProgramCache]: Analyzing trace with hash -887446107, now seen corresponding path program 28 times [2021-05-03 14:19:01,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:01,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737457187] [2021-05-03 14:19:01,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:19:01,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737457187] [2021-05-03 14:19:01,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629080244] [2021-05-03 14:19:01,891 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:01,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:19:01,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:01,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:19:01,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:01,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:01,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-03 14:19:01,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207641780] [2021-05-03 14:19:01,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:19:01,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:01,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:19:01,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:19:01,988 INFO L87 Difference]: Start difference. First operand 33989 states and 149484 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:02,555 INFO L93 Difference]: Finished difference Result 63659 states and 263324 transitions. [2021-05-03 14:19:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:19:02,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:19:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:02,741 INFO L225 Difference]: With dead ends: 63659 [2021-05-03 14:19:02,741 INFO L226 Difference]: Without dead ends: 63659 [2021-05-03 14:19:02,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:19:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63659 states. [2021-05-03 14:19:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63659 to 33989. [2021-05-03 14:19:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33989 states, 33988 states have (on average 4.391138048723079) internal successors, (149246), 33988 states have internal predecessors, (149246), 0 states have call successors, (0), 0 states 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 14:19:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33989 states to 33989 states and 149246 transitions. [2021-05-03 14:19:03,875 INFO L78 Accepts]: Start accepts. Automaton has 33989 states and 149246 transitions. Word has length 29 [2021-05-03 14:19:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:03,875 INFO L480 AbstractCegarLoop]: Abstraction has 33989 states and 149246 transitions. [2021-05-03 14:19:03,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 33989 states and 149246 transitions. [2021-05-03 14:19:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:19:03,941 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:03,941 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:04,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-03 14:19:04,142 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:04,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1125409499, now seen corresponding path program 29 times [2021-05-03 14:19:04,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:04,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823709930] [2021-05-03 14:19:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:19:04,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823709930] [2021-05-03 14:19:04,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524255192] [2021-05-03 14:19:04,172 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:04,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:19:04,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:04,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:19:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:04,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:04,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-03 14:19:04,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953659920] [2021-05-03 14:19:04,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:19:04,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:04,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:19:04,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:19:04,270 INFO L87 Difference]: Start difference. First operand 33989 states and 149246 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:05,083 INFO L93 Difference]: Finished difference Result 49482 states and 206551 transitions. [2021-05-03 14:19:05,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:19:05,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:19:05,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:05,225 INFO L225 Difference]: With dead ends: 49482 [2021-05-03 14:19:05,225 INFO L226 Difference]: Without dead ends: 49458 [2021-05-03 14:19:05,225 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:19:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49458 states. [2021-05-03 14:19:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49458 to 33537. [2021-05-03 14:19:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33537 states, 33536 states have (on average 4.385376908396947) internal successors, (147068), 33536 states have internal predecessors, (147068), 0 states have call successors, (0), 0 states 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 14:19:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33537 states to 33537 states and 147068 transitions. [2021-05-03 14:19:06,353 INFO L78 Accepts]: Start accepts. Automaton has 33537 states and 147068 transitions. Word has length 29 [2021-05-03 14:19:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:06,353 INFO L480 AbstractCegarLoop]: Abstraction has 33537 states and 147068 transitions. [2021-05-03 14:19:06,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 33537 states and 147068 transitions. [2021-05-03 14:19:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:19:06,437 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:06,437 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:06,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:06,658 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:06,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1489061157, now seen corresponding path program 30 times [2021-05-03 14:19:06,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:06,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285349577] [2021-05-03 14:19:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:19:06,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285349577] [2021-05-03 14:19:06,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117899437] [2021-05-03 14:19:06,685 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:06,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:19:06,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:06,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:19:06,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:06,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:06,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-03 14:19:06,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181672498] [2021-05-03 14:19:06,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:19:06,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:06,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:19:06,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:19:06,824 INFO L87 Difference]: Start difference. First operand 33537 states and 147068 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:07,645 INFO L93 Difference]: Finished difference Result 58652 states and 245549 transitions. [2021-05-03 14:19:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:19:07,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:19:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:07,829 INFO L225 Difference]: With dead ends: 58652 [2021-05-03 14:19:07,829 INFO L226 Difference]: Without dead ends: 58652 [2021-05-03 14:19:07,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:19:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58652 states. [2021-05-03 14:19:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58652 to 33775. [2021-05-03 14:19:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33775 states, 33774 states have (on average 4.384378516018239) internal successors, (148078), 33774 states have internal predecessors, (148078), 0 states have call successors, (0), 0 states 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 14:19:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33775 states to 33775 states and 148078 transitions. [2021-05-03 14:19:08,945 INFO L78 Accepts]: Start accepts. Automaton has 33775 states and 148078 transitions. Word has length 29 [2021-05-03 14:19:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:08,945 INFO L480 AbstractCegarLoop]: Abstraction has 33775 states and 148078 transitions. [2021-05-03 14:19:08,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 33775 states and 148078 transitions. [2021-05-03 14:19:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:19:09,013 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:09,013 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:09,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:09,228 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:09,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:09,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1816439459, now seen corresponding path program 31 times [2021-05-03 14:19:09,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:09,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871180985] [2021-05-03 14:19:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:19:09,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871180985] [2021-05-03 14:19:09,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612428063] [2021-05-03 14:19:09,253 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:09,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:19:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:09,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:09,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-03 14:19:09,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649795549] [2021-05-03 14:19:09,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:19:09,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:09,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:19:09,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:19:09,348 INFO L87 Difference]: Start difference. First operand 33775 states and 148078 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:10,289 INFO L93 Difference]: Finished difference Result 57310 states and 235132 transitions. [2021-05-03 14:19:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:19:10,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:19:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:10,460 INFO L225 Difference]: With dead ends: 57310 [2021-05-03 14:19:10,460 INFO L226 Difference]: Without dead ends: 57285 [2021-05-03 14:19:10,460 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:19:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57285 states. [2021-05-03 14:19:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57285 to 33775. [2021-05-03 14:19:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33775 states, 33774 states have (on average 4.3840232131225205) internal successors, (148066), 33774 states have internal predecessors, (148066), 0 states have call successors, (0), 0 states 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 14:19:11,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33775 states to 33775 states and 148066 transitions. [2021-05-03 14:19:11,243 INFO L78 Accepts]: Start accepts. Automaton has 33775 states and 148066 transitions. Word has length 29 [2021-05-03 14:19:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:11,243 INFO L480 AbstractCegarLoop]: Abstraction has 33775 states and 148066 transitions. [2021-05-03 14:19:11,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 33775 states and 148066 transitions. [2021-05-03 14:19:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:19:11,571 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:11,571 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:11,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:11,772 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash 614806497, now seen corresponding path program 32 times [2021-05-03 14:19:11,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:11,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548251640] [2021-05-03 14:19:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:19:11,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548251640] [2021-05-03 14:19:11,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500979] [2021-05-03 14:19:11,796 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:11,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:19:11,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:11,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:19:11,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:11,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:11,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-03 14:19:11,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144220363] [2021-05-03 14:19:11,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:19:11,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:19:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:19:11,889 INFO L87 Difference]: Start difference. First operand 33775 states and 148066 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:13,184 INFO L93 Difference]: Finished difference Result 79431 states and 334909 transitions. [2021-05-03 14:19:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 14:19:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:19:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:13,434 INFO L225 Difference]: With dead ends: 79431 [2021-05-03 14:19:13,434 INFO L226 Difference]: Without dead ends: 79431 [2021-05-03 14:19:13,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 459.0ms TimeCoverageRelationStatistics Valid=556, Invalid=1994, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:19:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79431 states. [2021-05-03 14:19:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79431 to 34251. [2021-05-03 14:19:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34251 states, 34250 states have (on average 4.38207299270073) internal successors, (150086), 34250 states have internal predecessors, (150086), 0 states have call successors, (0), 0 states 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 14:19:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34251 states to 34251 states and 150086 transitions. [2021-05-03 14:19:14,683 INFO L78 Accepts]: Start accepts. Automaton has 34251 states and 150086 transitions. Word has length 29 [2021-05-03 14:19:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:14,683 INFO L480 AbstractCegarLoop]: Abstraction has 34251 states and 150086 transitions. [2021-05-03 14:19:14,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 34251 states and 150086 transitions. [2021-05-03 14:19:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:19:14,746 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:14,747 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:14,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:14,947 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:14,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1481070735, now seen corresponding path program 33 times [2021-05-03 14:19:14,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:14,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698047036] [2021-05-03 14:19:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:19:14,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698047036] [2021-05-03 14:19:14,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247270069] [2021-05-03 14:19:14,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:14,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:19:14,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:14,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:19:14,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:15,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:15,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-03 14:19:15,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923385666] [2021-05-03 14:19:15,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:19:15,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:15,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:19:15,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:19:15,068 INFO L87 Difference]: Start difference. First operand 34251 states and 150086 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:15,408 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-05-03 14:19:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:16,063 INFO L93 Difference]: Finished difference Result 73063 states and 296904 transitions. [2021-05-03 14:19:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:19:16,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:19:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:16,309 INFO L225 Difference]: With dead ends: 73063 [2021-05-03 14:19:16,310 INFO L226 Difference]: Without dead ends: 72813 [2021-05-03 14:19:16,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:19:16,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72813 states. [2021-05-03 14:19:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72813 to 34704. [2021-05-03 14:19:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34704 states, 34703 states have (on average 4.386681266749273) internal successors, (152231), 34703 states have internal predecessors, (152231), 0 states have call successors, (0), 0 states 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 14:19:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34704 states to 34704 states and 152231 transitions. [2021-05-03 14:19:17,583 INFO L78 Accepts]: Start accepts. Automaton has 34704 states and 152231 transitions. Word has length 29 [2021-05-03 14:19:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:17,583 INFO L480 AbstractCegarLoop]: Abstraction has 34704 states and 152231 transitions. [2021-05-03 14:19:17,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 34704 states and 152231 transitions. [2021-05-03 14:19:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:19:17,662 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:17,662 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:17,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:17,878 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash -331705119, now seen corresponding path program 34 times [2021-05-03 14:19:17,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:17,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457191510] [2021-05-03 14:19:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:17,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457191510] [2021-05-03 14:19:17,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78790491] [2021-05-03 14:19:17,942 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:17,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:19:17,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:17,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:19:17,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:18,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:18,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:19:18,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151382094] [2021-05-03 14:19:18,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:19:18,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:18,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:19:18,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:19:18,093 INFO L87 Difference]: Start difference. First operand 34704 states and 152231 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:19,927 INFO L93 Difference]: Finished difference Result 60164 states and 255426 transitions. [2021-05-03 14:19:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:19:19,928 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:19:19,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:20,176 INFO L225 Difference]: With dead ends: 60164 [2021-05-03 14:19:20,176 INFO L226 Difference]: Without dead ends: 60139 [2021-05-03 14:19:20,176 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:19:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60139 states. [2021-05-03 14:19:20,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60139 to 34900. [2021-05-03 14:19:21,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34900 states, 34899 states have (on average 4.346571535001003) internal successors, (151691), 34899 states have internal predecessors, (151691), 0 states have call successors, (0), 0 states 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 14:19:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34900 states to 34900 states and 151691 transitions. [2021-05-03 14:19:21,518 INFO L78 Accepts]: Start accepts. Automaton has 34900 states and 151691 transitions. Word has length 29 [2021-05-03 14:19:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:21,518 INFO L480 AbstractCegarLoop]: Abstraction has 34900 states and 151691 transitions. [2021-05-03 14:19:21,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 34900 states and 151691 transitions. [2021-05-03 14:19:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 14:19:21,586 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:21,586 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:21,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-05-03 14:19:21,787 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:21,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1845071989, now seen corresponding path program 35 times [2021-05-03 14:19:21,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:21,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181355577] [2021-05-03 14:19:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:21,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181355577] [2021-05-03 14:19:21,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407101727] [2021-05-03 14:19:21,830 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:21,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:19:21,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:21,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:19:21,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:19:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:21,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:21,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:19:21,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436252141] [2021-05-03 14:19:21,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:19:21,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:21,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:19:21,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:19:21,931 INFO L87 Difference]: Start difference. First operand 34900 states and 151691 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:22,739 INFO L93 Difference]: Finished difference Result 58744 states and 238407 transitions. [2021-05-03 14:19:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:19:22,740 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 14:19:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:22,940 INFO L225 Difference]: With dead ends: 58744 [2021-05-03 14:19:22,941 INFO L226 Difference]: Without dead ends: 58603 [2021-05-03 14:19:22,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:19:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58603 states. [2021-05-03 14:19:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58603 to 35796. [2021-05-03 14:19:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35796 states, 35795 states have (on average 4.330828327978768) internal successors, (155022), 35795 states have internal predecessors, (155022), 0 states have call successors, (0), 0 states 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 14:19:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35796 states to 35796 states and 155022 transitions. [2021-05-03 14:19:24,109 INFO L78 Accepts]: Start accepts. Automaton has 35796 states and 155022 transitions. Word has length 29 [2021-05-03 14:19:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:24,109 INFO L480 AbstractCegarLoop]: Abstraction has 35796 states and 155022 transitions. [2021-05-03 14:19:24,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:19:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 35796 states and 155022 transitions. [2021-05-03 14:19:24,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 14:19:24,174 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:24,174 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:24,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:24,375 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:24,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:24,375 INFO L82 PathProgramCache]: Analyzing trace with hash 886143307, now seen corresponding path program 36 times [2021-05-03 14:19:24,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:24,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119388602] [2021-05-03 14:19:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:24,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119388602] [2021-05-03 14:19:24,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115055292] [2021-05-03 14:19:24,415 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:19:24,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:19:24,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:19:24,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:19:24,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:19:24,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:19:24,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-05-03 14:19:24,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944593580] [2021-05-03 14:19:24,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:19:24,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:19:24,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:19:24,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:19:24,574 INFO L87 Difference]: Start difference. First operand 35796 states and 155022 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 14:19:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:19:25,281 INFO L93 Difference]: Finished difference Result 38312 states and 164159 transitions. [2021-05-03 14:19:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:19:25,282 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 31 [2021-05-03 14:19:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:19:25,388 INFO L225 Difference]: With dead ends: 38312 [2021-05-03 14:19:25,388 INFO L226 Difference]: Without dead ends: 38244 [2021-05-03 14:19:25,388 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:19:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38244 states. [2021-05-03 14:19:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38244 to 36866. [2021-05-03 14:19:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36866 states, 36865 states have (on average 4.320493693204937) internal successors, (159275), 36865 states have internal predecessors, (159275), 0 states have call successors, (0), 0 states 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 14:19:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36866 states to 36866 states and 159275 transitions. [2021-05-03 14:19:26,112 INFO L78 Accepts]: Start accepts. Automaton has 36866 states and 159275 transitions. Word has length 31 [2021-05-03 14:19:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:19:26,112 INFO L480 AbstractCegarLoop]: Abstraction has 36866 states and 159275 transitions. [2021-05-03 14:19:26,113 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 14:19:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 36866 states and 159275 transitions. [2021-05-03 14:19:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 14:19:26,184 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:19:26,184 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:19:26,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:26,385 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:19:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:19:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash 948308035, now seen corresponding path program 37 times [2021-05-03 14:19:26,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:19:26,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767248146] [2021-05-03 14:19:26,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:19:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:19:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767248146] [2021-05-03 14:19:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815466769] [2021-05-03 14:19:26,428 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:19:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:19:26,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:19:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:19:26,688 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 10