/usr/bin/java -Xmx8000000000 -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/exp2x4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:23:55,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:23:55,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:23:55,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 17:23:55,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 17:23:55,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 17:23:55,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 17:23:55,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 17:23:55,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 17:23:55,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 17:23:55,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 17:23:55,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 17:23:55,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 17:23:55,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 17:23:55,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 17:23:55,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 17:23:55,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 17:23:55,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 17:23:55,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 17:23:55,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 17:23:55,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 17:23:55,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 17:23:55,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 17:23:55,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 17:23:55,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 17:23:55,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 17:23:55,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 17:23:55,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 17:23:55,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 17:23:55,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 17:23:55,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 17:23:55,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 17:23:55,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 17:23:55,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 17:23:55,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 17:23:55,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 17:23:55,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 17:23:55,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 17:23:55,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 17:23:55,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 17:23:55,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 17:23:55,902 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 [2021-07-09 17:23:55,925 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:23:55,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:23:55,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:23:55,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:23:55,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:23:55,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:23:55,927 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:23:55,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:23:55,928 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:23:55,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:23:55,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:23:55,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:23:55,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:23:55,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:23:55,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:23:55,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:23:55,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:23:55,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:23:55,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:23:55,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:23:55,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:23:55,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:23:55,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:23:55,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:23:55,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:23:55,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:23:55,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:23:55,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:23:55,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:23:55,930 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:23:55,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:23:55,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:23:56,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:23:56,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:23:56,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:23:56,186 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:23:56,188 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:23:56,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl [2021-07-09 17:23:56,189 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl' [2021-07-09 17:23:56,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:23:56,226 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:23:56,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:23:56,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:23:56,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:23:56,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:56" (1/1) ... [2021-07-09 17:23:56,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:56" (1/1) ... [2021-07-09 17:23:56,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:23:56,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:23:56,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:23:56,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:23:56,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:56" (1/1) ... [2021-07-09 17:23:56,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:56" (1/1) ... [2021-07-09 17:23:56,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:56" (1/1) ... [2021-07-09 17:23:56,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:56" (1/1) ... [2021-07-09 17:23:56,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:56" (1/1) ... [2021-07-09 17:23:56,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:56" (1/1) ... [2021-07-09 17:23:56,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:56" (1/1) ... [2021-07-09 17:23:56,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:23:56,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:23:56,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:23:56,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:23:56,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:56" (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 [2021-07-09 17:23:56,322 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:23:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:23:56,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:23:56,322 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:23:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:23:56,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:23:56,322 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:23:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:23:56,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:23:56,323 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:23:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:23:56,323 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:23:56,323 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 17:23:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 17:23:56,323 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 17:23:56,324 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:23:56,460 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:23:56,460 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:23:56,461 INFO L202 PluginConnector]: Adding new model exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:23:56 BoogieIcfgContainer [2021-07-09 17:23:56,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:23:56,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:23:56,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:23:56,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:23:56,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:56" (1/2) ... [2021-07-09 17:23:56,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297b2bf2 and model type exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:23:56, skipping insertion in model container [2021-07-09 17:23:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:23:56" (2/2) ... [2021-07-09 17:23:56,466 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x4.wvr.bpl [2021-07-09 17:23:56,469 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:23:56,469 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:23:56,469 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:23:56,470 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:23:56,512 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 17:23:56,530 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 17:23:56,545 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:23:56,545 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:23:56,545 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:23:56,545 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:23:56,545 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:23:56,545 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:23:56,545 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:23:56,546 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:23:56,552 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 37 transitions, 106 flow [2021-07-09 17:23:56,633 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:56,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:56,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:56,658 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:56,658 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:56,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:56,662 INFO L82 PathProgramCache]: Analyzing trace with hash 500910984, now seen corresponding path program 1 times [2021-07-09 17:23:56,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:56,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489335939] [2021-07-09 17:23:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:56,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:56,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489335939] [2021-07-09 17:23:56,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489335939] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:56,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:56,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:23:56,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578210489] [2021-07-09 17:23:56,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:23:56,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:56,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:23:56,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:23:56,804 INFO L87 Difference]: Start difference. First operand has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 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) [2021-07-09 17:23:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:56,890 INFO L93 Difference]: Finished difference Result 1365 states and 5324 transitions. [2021-07-09 17:23:56,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:23:56,891 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 [2021-07-09 17:23:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:56,919 INFO L225 Difference]: With dead ends: 1365 [2021-07-09 17:23:56,919 INFO L226 Difference]: Without dead ends: 1334 [2021-07-09 17:23:56,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:23:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-07-09 17:23:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1069. [2021-07-09 17:23:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.903558052434457) internal successors, (4169), 1068 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4169 transitions. [2021-07-09 17:23:57,031 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4169 transitions. Word has length 19 [2021-07-09 17:23:57,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:57,031 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 4169 transitions. [2021-07-09 17:23:57,032 INFO L483 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) [2021-07-09 17:23:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4169 transitions. [2021-07-09 17:23:57,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:23:57,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:57,039 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:57,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:23:57,040 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:57,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1942329299, now seen corresponding path program 1 times [2021-07-09 17:23:57,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:57,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221096696] [2021-07-09 17:23:57,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:57,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:57,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221096696] [2021-07-09 17:23:57,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221096696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:57,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071607655] [2021-07-09 17:23:57,101 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 [2021-07-09 17:23:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:57,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:23:57,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:57,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071607655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:57,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:57,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-09 17:23:57,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29597865] [2021-07-09 17:23:57,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:57,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:57,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:57,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:57,251 INFO L87 Difference]: Start difference. First operand 1069 states and 4169 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:57,334 INFO L93 Difference]: Finished difference Result 2313 states and 8847 transitions. [2021-07-09 17:23:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:23:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:57,356 INFO L225 Difference]: With dead ends: 2313 [2021-07-09 17:23:57,356 INFO L226 Difference]: Without dead ends: 2313 [2021-07-09 17:23:57,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-07-09 17:23:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1246. [2021-07-09 17:23:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.9710843373493976) internal successors, (4944), 1245 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4944 transitions. [2021-07-09 17:23:57,418 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4944 transitions. Word has length 22 [2021-07-09 17:23:57,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:57,419 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4944 transitions. [2021-07-09 17:23:57,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4944 transitions. [2021-07-09 17:23:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:23:57,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:57,424 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:57,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:23:57,633 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:57,633 INFO L82 PathProgramCache]: Analyzing trace with hash -977644340, now seen corresponding path program 1 times [2021-07-09 17:23:57,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:57,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189101911] [2021-07-09 17:23:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:57,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:57,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189101911] [2021-07-09 17:23:57,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189101911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:57,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880529298] [2021-07-09 17:23:57,688 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 [2021-07-09 17:23:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:57,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:23:57,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:57,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880529298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:57,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:57,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-09 17:23:57,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514369172] [2021-07-09 17:23:57,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:57,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:57,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:57,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:57,802 INFO L87 Difference]: Start difference. First operand 1246 states and 4944 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:57,864 INFO L93 Difference]: Finished difference Result 2518 states and 9792 transitions. [2021-07-09 17:23:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:57,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:23:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:57,880 INFO L225 Difference]: With dead ends: 2518 [2021-07-09 17:23:57,880 INFO L226 Difference]: Without dead ends: 2518 [2021-07-09 17:23:57,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-07-09 17:23:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1535. [2021-07-09 17:23:57,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 4.046284224250326) internal successors, (6207), 1534 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6207 transitions. [2021-07-09 17:23:57,936 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6207 transitions. Word has length 22 [2021-07-09 17:23:57,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:57,936 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 6207 transitions. [2021-07-09 17:23:57,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6207 transitions. [2021-07-09 17:23:57,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:23:57,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:57,940 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:58,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:58,159 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:58,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1083698467, now seen corresponding path program 1 times [2021-07-09 17:23:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:58,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970304177] [2021-07-09 17:23:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:58,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:58,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970304177] [2021-07-09 17:23:58,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970304177] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:58,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:58,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:58,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895093238] [2021-07-09 17:23:58,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:58,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:58,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:58,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:58,196 INFO L87 Difference]: Start difference. First operand 1535 states and 6207 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:58,251 INFO L93 Difference]: Finished difference Result 2143 states and 8381 transitions. [2021-07-09 17:23:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:58,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:23:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:58,263 INFO L225 Difference]: With dead ends: 2143 [2021-07-09 17:23:58,263 INFO L226 Difference]: Without dead ends: 2120 [2021-07-09 17:23:58,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-07-09 17:23:58,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1600. [2021-07-09 17:23:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.9987492182614135) internal successors, (6394), 1599 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 6394 transitions. [2021-07-09 17:23:58,333 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 6394 transitions. Word has length 22 [2021-07-09 17:23:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:58,333 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 6394 transitions. [2021-07-09 17:23:58,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 6394 transitions. [2021-07-09 17:23:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:23:58,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:58,339 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:58,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:23:58,339 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:58,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:58,340 INFO L82 PathProgramCache]: Analyzing trace with hash 269710136, now seen corresponding path program 1 times [2021-07-09 17:23:58,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:58,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515184738] [2021-07-09 17:23:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:58,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:58,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515184738] [2021-07-09 17:23:58,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515184738] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:58,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:58,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:58,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861958991] [2021-07-09 17:23:58,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:58,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:58,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:58,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:58,360 INFO L87 Difference]: Start difference. First operand 1600 states and 6394 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:58,424 INFO L93 Difference]: Finished difference Result 2353 states and 9126 transitions. [2021-07-09 17:23:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:58,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:23:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:58,439 INFO L225 Difference]: With dead ends: 2353 [2021-07-09 17:23:58,439 INFO L226 Difference]: Without dead ends: 2337 [2021-07-09 17:23:58,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-07-09 17:23:58,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1670. [2021-07-09 17:23:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.9622528460155784) internal successors, (6613), 1669 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 6613 transitions. [2021-07-09 17:23:58,494 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 6613 transitions. Word has length 22 [2021-07-09 17:23:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:58,495 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 6613 transitions. [2021-07-09 17:23:58,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 6613 transitions. [2021-07-09 17:23:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:23:58,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:58,499 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:58,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:23:58,500 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:58,500 INFO L82 PathProgramCache]: Analyzing trace with hash 121894375, now seen corresponding path program 2 times [2021-07-09 17:23:58,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:58,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033303532] [2021-07-09 17:23:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:58,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:58,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033303532] [2021-07-09 17:23:58,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033303532] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:58,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:58,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:58,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325133713] [2021-07-09 17:23:58,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:58,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:58,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:58,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:58,518 INFO L87 Difference]: Start difference. First operand 1670 states and 6613 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:58,577 INFO L93 Difference]: Finished difference Result 2314 states and 9023 transitions. [2021-07-09 17:23:58,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:58,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:23:58,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:58,590 INFO L225 Difference]: With dead ends: 2314 [2021-07-09 17:23:58,590 INFO L226 Difference]: Without dead ends: 2314 [2021-07-09 17:23:58,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:58,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-07-09 17:23:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1847. [2021-07-09 17:23:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 3.978331527627302) internal successors, (7344), 1846 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 7344 transitions. [2021-07-09 17:23:58,639 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 7344 transitions. Word has length 22 [2021-07-09 17:23:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:58,639 INFO L482 AbstractCegarLoop]: Abstraction has 1847 states and 7344 transitions. [2021-07-09 17:23:58,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 7344 transitions. [2021-07-09 17:23:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:23:58,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:58,645 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:58,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:23:58,645 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:58,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:58,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1727272710, now seen corresponding path program 2 times [2021-07-09 17:23:58,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:58,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688853905] [2021-07-09 17:23:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:58,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:58,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688853905] [2021-07-09 17:23:58,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688853905] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:58,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:58,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:58,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413352619] [2021-07-09 17:23:58,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:58,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:58,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:58,696 INFO L87 Difference]: Start difference. First operand 1847 states and 7344 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:58,785 INFO L93 Difference]: Finished difference Result 2315 states and 8927 transitions. [2021-07-09 17:23:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:58,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:23:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:58,794 INFO L225 Difference]: With dead ends: 2315 [2021-07-09 17:23:58,795 INFO L226 Difference]: Without dead ends: 2297 [2021-07-09 17:23:58,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-07-09 17:23:58,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1919. [2021-07-09 17:23:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.946298227320125) internal successors, (7569), 1918 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 7569 transitions. [2021-07-09 17:23:58,852 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 7569 transitions. Word has length 22 [2021-07-09 17:23:58,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:58,853 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 7569 transitions. [2021-07-09 17:23:58,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 7569 transitions. [2021-07-09 17:23:58,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:23:58,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:58,860 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:58,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:23:58,860 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:58,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:58,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1751500668, now seen corresponding path program 2 times [2021-07-09 17:23:58,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:58,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324100600] [2021-07-09 17:23:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:58,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:58,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324100600] [2021-07-09 17:23:58,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324100600] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:58,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:58,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:58,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650144908] [2021-07-09 17:23:58,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:58,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:58,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:58,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:58,879 INFO L87 Difference]: Start difference. First operand 1919 states and 7569 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:58,936 INFO L93 Difference]: Finished difference Result 2879 states and 11172 transitions. [2021-07-09 17:23:58,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:58,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:23:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:58,950 INFO L225 Difference]: With dead ends: 2879 [2021-07-09 17:23:58,950 INFO L226 Difference]: Without dead ends: 2879 [2021-07-09 17:23:58,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-07-09 17:23:58,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2176. [2021-07-09 17:23:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.964137931034483) internal successors, (8622), 2175 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 8622 transitions. [2021-07-09 17:23:59,023 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 8622 transitions. Word has length 22 [2021-07-09 17:23:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:59,024 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 8622 transitions. [2021-07-09 17:23:59,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 8622 transitions. [2021-07-09 17:23:59,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:23:59,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:59,031 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:59,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:23:59,031 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:59,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1947070755, now seen corresponding path program 2 times [2021-07-09 17:23:59,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:59,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120650171] [2021-07-09 17:23:59,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:59,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:59,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120650171] [2021-07-09 17:23:59,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120650171] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:59,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:59,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:59,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325979102] [2021-07-09 17:23:59,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:59,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:59,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:59,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:59,071 INFO L87 Difference]: Start difference. First operand 2176 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:59,127 INFO L93 Difference]: Finished difference Result 2839 states and 10862 transitions. [2021-07-09 17:23:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:59,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:23:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:59,137 INFO L225 Difference]: With dead ends: 2839 [2021-07-09 17:23:59,137 INFO L226 Difference]: Without dead ends: 2811 [2021-07-09 17:23:59,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-07-09 17:23:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2291. [2021-07-09 17:23:59,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.9375545851528386) internal successors, (9017), 2290 states have internal predecessors, (9017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 9017 transitions. [2021-07-09 17:23:59,217 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 9017 transitions. Word has length 22 [2021-07-09 17:23:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:59,217 INFO L482 AbstractCegarLoop]: Abstraction has 2291 states and 9017 transitions. [2021-07-09 17:23:59,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 9017 transitions. [2021-07-09 17:23:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:59,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:59,225 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:59,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 17:23:59,225 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:59,225 INFO L82 PathProgramCache]: Analyzing trace with hash 509204595, now seen corresponding path program 1 times [2021-07-09 17:23:59,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:59,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919651872] [2021-07-09 17:23:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:59,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:59,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919651872] [2021-07-09 17:23:59,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919651872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:59,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696781310] [2021-07-09 17:23:59,298 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 [2021-07-09 17:23:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:59,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:59,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696781310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:59,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:59,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-09 17:23:59,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826073130] [2021-07-09 17:23:59,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:59,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:59,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:59,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:59,488 INFO L87 Difference]: Start difference. First operand 2291 states and 9017 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:59,655 INFO L93 Difference]: Finished difference Result 3791 states and 14505 transitions. [2021-07-09 17:23:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:23:59,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:59,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:59,667 INFO L225 Difference]: With dead ends: 3791 [2021-07-09 17:23:59,668 INFO L226 Difference]: Without dead ends: 3655 [2021-07-09 17:23:59,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2021-07-09 17:23:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2656. [2021-07-09 17:23:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 3.9450094161958567) internal successors, (10474), 2655 states have internal predecessors, (10474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 10474 transitions. [2021-07-09 17:23:59,737 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 10474 transitions. Word has length 25 [2021-07-09 17:23:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:59,737 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 10474 transitions. [2021-07-09 17:23:59,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 10474 transitions. [2021-07-09 17:23:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:59,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:59,744 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:59,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:23:59,957 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:59,957 INFO L82 PathProgramCache]: Analyzing trace with hash 805897905, now seen corresponding path program 2 times [2021-07-09 17:23:59,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:59,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858431182] [2021-07-09 17:23:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:00,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:00,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858431182] [2021-07-09 17:24:00,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858431182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:00,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451219618] [2021-07-09 17:24:00,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:00,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:00,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:00,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:24:00,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:00,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451219618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:00,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:00,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-07-09 17:24:00,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200472407] [2021-07-09 17:24:00,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:24:00,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:00,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:24:00,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:24:00,233 INFO L87 Difference]: Start difference. First operand 2656 states and 10474 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) [2021-07-09 17:24:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:00,435 INFO L93 Difference]: Finished difference Result 4004 states and 15422 transitions. [2021-07-09 17:24:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:24:00,436 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 [2021-07-09 17:24:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:00,448 INFO L225 Difference]: With dead ends: 4004 [2021-07-09 17:24:00,448 INFO L226 Difference]: Without dead ends: 3868 [2021-07-09 17:24:00,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:24:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-07-09 17:24:00,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 2991. [2021-07-09 17:24:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.9638795986622073) internal successors, (11852), 2990 states have internal predecessors, (11852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 11852 transitions. [2021-07-09 17:24:00,524 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 11852 transitions. Word has length 25 [2021-07-09 17:24:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:00,524 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 11852 transitions. [2021-07-09 17:24:00,524 INFO L483 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) [2021-07-09 17:24:00,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 11852 transitions. [2021-07-09 17:24:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:24:00,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:00,531 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:00,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:00,745 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1407841221, now seen corresponding path program 3 times [2021-07-09 17:24:00,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:00,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819832161] [2021-07-09 17:24:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:00,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:00,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819832161] [2021-07-09 17:24:00,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819832161] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:00,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:00,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:24:00,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368269476] [2021-07-09 17:24:00,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:24:00,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:00,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:24:00,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:00,807 INFO L87 Difference]: Start difference. First operand 2991 states and 11852 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:00,923 INFO L93 Difference]: Finished difference Result 4207 states and 16326 transitions. [2021-07-09 17:24:00,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:24:00,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:24:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:00,941 INFO L225 Difference]: With dead ends: 4207 [2021-07-09 17:24:00,941 INFO L226 Difference]: Without dead ends: 4139 [2021-07-09 17:24:00,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-07-09 17:24:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3438. [2021-07-09 17:24:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.9793424498108814) internal successors, (13677), 3437 states have internal predecessors, (13677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13677 transitions. [2021-07-09 17:24:01,048 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13677 transitions. Word has length 25 [2021-07-09 17:24:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:01,048 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 13677 transitions. [2021-07-09 17:24:01,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13677 transitions. [2021-07-09 17:24:01,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:24:01,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:01,057 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:01,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 17:24:01,058 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:01,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:01,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1668338337, now seen corresponding path program 1 times [2021-07-09 17:24:01,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:01,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75991323] [2021-07-09 17:24:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:01,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:01,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75991323] [2021-07-09 17:24:01,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75991323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:01,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339616678] [2021-07-09 17:24:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:24:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:01,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:24:01,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:01,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339616678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:01,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:01,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-09 17:24:01,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194246395] [2021-07-09 17:24:01,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:24:01,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:01,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:24:01,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:24:01,276 INFO L87 Difference]: Start difference. First operand 3438 states and 13677 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-07-09 17:24:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:01,501 INFO L93 Difference]: Finished difference Result 4729 states and 18310 transitions. [2021-07-09 17:24:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:24:01,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 25 [2021-07-09 17:24:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:01,517 INFO L225 Difference]: With dead ends: 4729 [2021-07-09 17:24:01,517 INFO L226 Difference]: Without dead ends: 4627 [2021-07-09 17:24:01,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:24:01,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-07-09 17:24:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3870. [2021-07-09 17:24:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 3.958904109589041) internal successors, (15317), 3869 states have internal predecessors, (15317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 15317 transitions. [2021-07-09 17:24:01,633 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 15317 transitions. Word has length 25 [2021-07-09 17:24:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:01,633 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 15317 transitions. [2021-07-09 17:24:01,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-07-09 17:24:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 15317 transitions. [2021-07-09 17:24:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:24:01,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:01,643 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:01,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 17:24:01,857 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:01,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2074425317, now seen corresponding path program 2 times [2021-07-09 17:24:01,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:01,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536029] [2021-07-09 17:24:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:01,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:01,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536029] [2021-07-09 17:24:01,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:01,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430841805] [2021-07-09 17:24:01,893 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 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 [2021-07-09 17:24:01,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:01,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:01,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:24:01,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:02,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430841805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:02,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:02,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-07-09 17:24:02,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832292015] [2021-07-09 17:24:02,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:24:02,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:02,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:24:02,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:24:02,036 INFO L87 Difference]: Start difference. First operand 3870 states and 15317 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:02,349 INFO L93 Difference]: Finished difference Result 4946 states and 19222 transitions. [2021-07-09 17:24:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:24:02,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:24:02,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:02,367 INFO L225 Difference]: With dead ends: 4946 [2021-07-09 17:24:02,367 INFO L226 Difference]: Without dead ends: 4844 [2021-07-09 17:24:02,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:24:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2021-07-09 17:24:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4195. [2021-07-09 17:24:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 3.966618979494516) internal successors, (16636), 4194 states have internal predecessors, (16636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 16636 transitions. [2021-07-09 17:24:02,464 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 16636 transitions. Word has length 25 [2021-07-09 17:24:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:02,464 INFO L482 AbstractCegarLoop]: Abstraction has 4195 states and 16636 transitions. [2021-07-09 17:24:02,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 16636 transitions. [2021-07-09 17:24:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:24:02,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:02,518 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:02,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:02,733 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:02,734 INFO L82 PathProgramCache]: Analyzing trace with hash -256616277, now seen corresponding path program 3 times [2021-07-09 17:24:02,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:02,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834369553] [2021-07-09 17:24:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:02,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:02,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834369553] [2021-07-09 17:24:02,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834369553] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:24:02,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:24:02,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:24:02,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955735938] [2021-07-09 17:24:02,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:24:02,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:02,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:24:02,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:02,778 INFO L87 Difference]: Start difference. First operand 4195 states and 16636 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:02,909 INFO L93 Difference]: Finished difference Result 5169 states and 20167 transitions. [2021-07-09 17:24:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:24:02,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:24:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:02,923 INFO L225 Difference]: With dead ends: 5169 [2021-07-09 17:24:02,924 INFO L226 Difference]: Without dead ends: 5118 [2021-07-09 17:24:02,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:24:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-07-09 17:24:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4611. [2021-07-09 17:24:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 3.9731019522776574) internal successors, (18316), 4610 states have internal predecessors, (18316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 18316 transitions. [2021-07-09 17:24:03,027 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 18316 transitions. Word has length 25 [2021-07-09 17:24:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:03,027 INFO L482 AbstractCegarLoop]: Abstraction has 4611 states and 18316 transitions. [2021-07-09 17:24:03,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 18316 transitions. [2021-07-09 17:24:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:03,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:03,039 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:03,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-09 17:24:03,039 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1347954008, now seen corresponding path program 4 times [2021-07-09 17:24:03,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:03,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973181856] [2021-07-09 17:24:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:03,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:03,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973181856] [2021-07-09 17:24:03,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973181856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:03,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021192292] [2021-07-09 17:24:03,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:03,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:03,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:03,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021192292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:03,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:03,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:24:03,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679468383] [2021-07-09 17:24:03,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:03,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:03,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:03,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:03,195 INFO L87 Difference]: Start difference. First operand 4611 states and 18316 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:04,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:04,022 INFO L93 Difference]: Finished difference Result 11402 states and 44327 transitions. [2021-07-09 17:24:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:24:04,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-07-09 17:24:04,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:04,058 INFO L225 Difference]: With dead ends: 11402 [2021-07-09 17:24:04,059 INFO L226 Difference]: Without dead ends: 11402 [2021-07-09 17:24:04,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:24:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-07-09 17:24:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 5821. [2021-07-09 17:24:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 4.016151202749141) internal successors, (23374), 5820 states have internal predecessors, (23374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 23374 transitions. [2021-07-09 17:24:04,312 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 23374 transitions. Word has length 28 [2021-07-09 17:24:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:04,312 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 23374 transitions. [2021-07-09 17:24:04,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:04,312 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 23374 transitions. [2021-07-09 17:24:04,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:04,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:04,326 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:04,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:24:04,536 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:04,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:04,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1763427731, now seen corresponding path program 5 times [2021-07-09 17:24:04,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:04,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067574525] [2021-07-09 17:24:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:04,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:04,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067574525] [2021-07-09 17:24:04,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067574525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:04,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424948155] [2021-07-09 17:24:04,585 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 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 [2021-07-09 17:24:04,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:24:04,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:04,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:04,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:04,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424948155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:04,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:04,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:24:04,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750318162] [2021-07-09 17:24:04,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:04,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:04,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:04,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:04,691 INFO L87 Difference]: Start difference. First operand 5821 states and 23374 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:05,336 INFO L93 Difference]: Finished difference Result 15383 states and 58771 transitions. [2021-07-09 17:24:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:24:05,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-07-09 17:24:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:05,385 INFO L225 Difference]: With dead ends: 15383 [2021-07-09 17:24:05,385 INFO L226 Difference]: Without dead ends: 15203 [2021-07-09 17:24:05,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:24:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15203 states. [2021-07-09 17:24:05,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15203 to 8319. [2021-07-09 17:24:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.118177446501563) internal successors, (34255), 8318 states have internal predecessors, (34255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:05,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34255 transitions. [2021-07-09 17:24:05,753 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34255 transitions. Word has length 28 [2021-07-09 17:24:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:05,754 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34255 transitions. [2021-07-09 17:24:05,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34255 transitions. [2021-07-09 17:24:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:05,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:05,773 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:05,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:24:05,996 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:05,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1546556397, now seen corresponding path program 6 times [2021-07-09 17:24:05,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:05,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223189262] [2021-07-09 17:24:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:06,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:06,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223189262] [2021-07-09 17:24:06,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223189262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:06,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896492078] [2021-07-09 17:24:06,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:06,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:24:06,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:06,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:06,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896492078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:06,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:06,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:06,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13031258] [2021-07-09 17:24:06,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:06,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:06,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:06,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:06,147 INFO L87 Difference]: Start difference. First operand 8319 states and 34255 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:06,546 INFO L93 Difference]: Finished difference Result 16184 states and 62633 transitions. [2021-07-09 17:24:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:06,546 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:06,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:06,667 INFO L225 Difference]: With dead ends: 16184 [2021-07-09 17:24:06,667 INFO L226 Difference]: Without dead ends: 16184 [2021-07-09 17:24:06,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2021-07-09 17:24:06,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 8319. [2021-07-09 17:24:06,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.099062274585237) internal successors, (34096), 8318 states have internal predecessors, (34096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34096 transitions. [2021-07-09 17:24:07,008 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34096 transitions. Word has length 28 [2021-07-09 17:24:07,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:07,009 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34096 transitions. [2021-07-09 17:24:07,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34096 transitions. [2021-07-09 17:24:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:07,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:07,029 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:07,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:24:07,245 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2142952270, now seen corresponding path program 7 times [2021-07-09 17:24:07,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:07,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235985294] [2021-07-09 17:24:07,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:07,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:07,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235985294] [2021-07-09 17:24:07,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235985294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:07,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072642841] [2021-07-09 17:24:07,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:07,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:07,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:07,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072642841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:07,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:07,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:07,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539294437] [2021-07-09 17:24:07,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:07,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:07,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:07,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:07,366 INFO L87 Difference]: Start difference. First operand 8319 states and 34096 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:07,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:07,817 INFO L93 Difference]: Finished difference Result 10083 states and 39959 transitions. [2021-07-09 17:24:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:24:07,818 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:07,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:07,847 INFO L225 Difference]: With dead ends: 10083 [2021-07-09 17:24:07,847 INFO L226 Difference]: Without dead ends: 10027 [2021-07-09 17:24:07,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:07,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10027 states. [2021-07-09 17:24:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10027 to 8326. [2021-07-09 17:24:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 4.095975975975976) internal successors, (34099), 8325 states have internal predecessors, (34099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 34099 transitions. [2021-07-09 17:24:08,150 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 34099 transitions. Word has length 28 [2021-07-09 17:24:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:08,150 INFO L482 AbstractCegarLoop]: Abstraction has 8326 states and 34099 transitions. [2021-07-09 17:24:08,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 34099 transitions. [2021-07-09 17:24:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:08,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:08,169 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:08,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:08,389 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:08,389 INFO L82 PathProgramCache]: Analyzing trace with hash -270034728, now seen corresponding path program 8 times [2021-07-09 17:24:08,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:08,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749727606] [2021-07-09 17:24:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:08,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:08,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749727606] [2021-07-09 17:24:08,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749727606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:08,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104117447] [2021-07-09 17:24:08,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:24:08,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:08,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:08,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:08,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:08,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104117447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:08,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:08,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:08,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018522961] [2021-07-09 17:24:08,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:08,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:08,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:08,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:08,547 INFO L87 Difference]: Start difference. First operand 8326 states and 34099 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-07-09 17:24:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:09,160 INFO L93 Difference]: Finished difference Result 17529 states and 67736 transitions. [2021-07-09 17:24:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:24:09,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 28 [2021-07-09 17:24:09,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:09,209 INFO L225 Difference]: With dead ends: 17529 [2021-07-09 17:24:09,209 INFO L226 Difference]: Without dead ends: 17529 [2021-07-09 17:24:09,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17529 states. [2021-07-09 17:24:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17529 to 8432. [2021-07-09 17:24:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.087296880559839) internal successors, (34460), 8431 states have internal predecessors, (34460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34460 transitions. [2021-07-09 17:24:09,566 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34460 transitions. Word has length 28 [2021-07-09 17:24:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:09,566 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34460 transitions. [2021-07-09 17:24:09,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-07-09 17:24:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34460 transitions. [2021-07-09 17:24:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:09,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:09,583 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:09,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:09,789 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:09,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:09,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2015724689, now seen corresponding path program 9 times [2021-07-09 17:24:09,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:09,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50683901] [2021-07-09 17:24:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:09,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:09,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50683901] [2021-07-09 17:24:09,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50683901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:09,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666080970] [2021-07-09 17:24:09,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:09,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:24:09,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:09,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:09,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:09,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666080970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:09,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:09,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:09,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400210905] [2021-07-09 17:24:09,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:09,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:09,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:09,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:09,936 INFO L87 Difference]: Start difference. First operand 8432 states and 34460 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:10,414 INFO L93 Difference]: Finished difference Result 15647 states and 60285 transitions. [2021-07-09 17:24:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:24:10,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:10,456 INFO L225 Difference]: With dead ends: 15647 [2021-07-09 17:24:10,456 INFO L226 Difference]: Without dead ends: 15587 [2021-07-09 17:24:10,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15587 states. [2021-07-09 17:24:10,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15587 to 8432. [2021-07-09 17:24:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.084924682718539) internal successors, (34440), 8431 states have internal predecessors, (34440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34440 transitions. [2021-07-09 17:24:10,808 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34440 transitions. Word has length 28 [2021-07-09 17:24:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:10,808 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34440 transitions. [2021-07-09 17:24:10,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34440 transitions. [2021-07-09 17:24:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:10,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:10,826 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:11,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:11,028 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:11,029 INFO L82 PathProgramCache]: Analyzing trace with hash 946388915, now seen corresponding path program 10 times [2021-07-09 17:24:11,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:11,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324191941] [2021-07-09 17:24:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:11,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:11,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324191941] [2021-07-09 17:24:11,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324191941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:11,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486668147] [2021-07-09 17:24:11,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:24:11,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:11,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:11,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:11,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:11,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486668147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:11,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:11,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:11,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672928483] [2021-07-09 17:24:11,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:11,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:11,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:11,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:11,209 INFO L87 Difference]: Start difference. First operand 8432 states and 34440 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) [2021-07-09 17:24:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:11,854 INFO L93 Difference]: Finished difference Result 18798 states and 72632 transitions. [2021-07-09 17:24:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:11,854 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 28 [2021-07-09 17:24:11,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:11,910 INFO L225 Difference]: With dead ends: 18798 [2021-07-09 17:24:11,910 INFO L226 Difference]: Without dead ends: 18798 [2021-07-09 17:24:11,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18798 states. [2021-07-09 17:24:12,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18798 to 8538. [2021-07-09 17:24:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.08269884034204) internal successors, (34854), 8537 states have internal predecessors, (34854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34854 transitions. [2021-07-09 17:24:12,317 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34854 transitions. Word has length 28 [2021-07-09 17:24:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:12,317 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34854 transitions. [2021-07-09 17:24:12,317 INFO L483 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) [2021-07-09 17:24:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34854 transitions. [2021-07-09 17:24:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:12,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:12,335 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:12,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 17:24:12,544 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:12,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1542784788, now seen corresponding path program 11 times [2021-07-09 17:24:12,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:12,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770039824] [2021-07-09 17:24:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:12,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:12,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770039824] [2021-07-09 17:24:12,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770039824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:12,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187168636] [2021-07-09 17:24:12,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:12,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:24:12,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:12,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:12,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:12,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187168636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:12,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:12,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:12,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215913925] [2021-07-09 17:24:12,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:12,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:12,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:12,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:12,681 INFO L87 Difference]: Start difference. First operand 8538 states and 34854 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:13,204 INFO L93 Difference]: Finished difference Result 14070 states and 54143 transitions. [2021-07-09 17:24:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:13,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:13,241 INFO L225 Difference]: With dead ends: 14070 [2021-07-09 17:24:13,241 INFO L226 Difference]: Without dead ends: 14014 [2021-07-09 17:24:13,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:13,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14014 states. [2021-07-09 17:24:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14014 to 8538. [2021-07-09 17:24:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.080356096989575) internal successors, (34834), 8537 states have internal predecessors, (34834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34834 transitions. [2021-07-09 17:24:13,479 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34834 transitions. Word has length 28 [2021-07-09 17:24:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:13,479 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34834 transitions. [2021-07-09 17:24:13,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34834 transitions. [2021-07-09 17:24:13,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:13,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:13,496 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:13,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:13,704 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:13,705 INFO L82 PathProgramCache]: Analyzing trace with hash 477986465, now seen corresponding path program 12 times [2021-07-09 17:24:13,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:13,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527588422] [2021-07-09 17:24:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:13,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:13,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527588422] [2021-07-09 17:24:13,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527588422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:13,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571813031] [2021-07-09 17:24:13,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:24:13,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:24:13,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:13,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:13,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:13,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571813031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:13,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:13,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:13,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158569038] [2021-07-09 17:24:13,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:13,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:13,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:13,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:13,850 INFO L87 Difference]: Start difference. First operand 8538 states and 34834 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-07-09 17:24:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:14,776 INFO L93 Difference]: Finished difference Result 18926 states and 73169 transitions. [2021-07-09 17:24:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:24:14,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 28 [2021-07-09 17:24:14,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:14,842 INFO L225 Difference]: With dead ends: 18926 [2021-07-09 17:24:14,842 INFO L226 Difference]: Without dead ends: 18926 [2021-07-09 17:24:14,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:24:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2021-07-09 17:24:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 8689. [2021-07-09 17:24:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 8688 states have (on average 4.058586556169429) internal successors, (35261), 8688 states have internal predecessors, (35261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 35261 transitions. [2021-07-09 17:24:15,325 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 35261 transitions. Word has length 28 [2021-07-09 17:24:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:15,325 INFO L482 AbstractCegarLoop]: Abstraction has 8689 states and 35261 transitions. [2021-07-09 17:24:15,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-07-09 17:24:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 35261 transitions. [2021-07-09 17:24:15,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:15,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:15,345 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:15,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 17:24:15,561 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:15,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1479976792, now seen corresponding path program 13 times [2021-07-09 17:24:15,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:15,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038277206] [2021-07-09 17:24:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:15,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:15,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038277206] [2021-07-09 17:24:15,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038277206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:15,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712047019] [2021-07-09 17:24:15,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:15,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:15,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:15,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712047019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:15,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:15,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:15,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306970525] [2021-07-09 17:24:15,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:15,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:15,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:15,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:15,711 INFO L87 Difference]: Start difference. First operand 8689 states and 35261 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:16,203 INFO L93 Difference]: Finished difference Result 12612 states and 48542 transitions. [2021-07-09 17:24:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:16,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:16,236 INFO L225 Difference]: With dead ends: 12612 [2021-07-09 17:24:16,237 INFO L226 Difference]: Without dead ends: 12556 [2021-07-09 17:24:16,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12556 states. [2021-07-09 17:24:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12556 to 8811. [2021-07-09 17:24:16,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.050397275822928) internal successors, (35684), 8810 states have internal predecessors, (35684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35684 transitions. [2021-07-09 17:24:16,496 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35684 transitions. Word has length 28 [2021-07-09 17:24:16,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:16,496 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35684 transitions. [2021-07-09 17:24:16,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35684 transitions. [2021-07-09 17:24:16,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:16,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:16,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:16,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:16,714 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:16,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:16,715 INFO L82 PathProgramCache]: Analyzing trace with hash -549507314, now seen corresponding path program 14 times [2021-07-09 17:24:16,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:16,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822730117] [2021-07-09 17:24:16,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:16,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:16,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822730117] [2021-07-09 17:24:16,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822730117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:16,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443938341] [2021-07-09 17:24:16,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:16,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:16,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:16,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:16,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443938341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:16,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:16,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:16,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009642151] [2021-07-09 17:24:16,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:16,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:16,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:16,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:16,861 INFO L87 Difference]: Start difference. First operand 8811 states and 35684 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:17,266 INFO L93 Difference]: Finished difference Result 16530 states and 63291 transitions. [2021-07-09 17:24:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:17,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:17,317 INFO L225 Difference]: With dead ends: 16530 [2021-07-09 17:24:17,318 INFO L226 Difference]: Without dead ends: 16530 [2021-07-09 17:24:17,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-07-09 17:24:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 8811. [2021-07-09 17:24:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.044381384790011) internal successors, (35631), 8810 states have internal predecessors, (35631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35631 transitions. [2021-07-09 17:24:17,628 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35631 transitions. Word has length 28 [2021-07-09 17:24:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:17,628 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35631 transitions. [2021-07-09 17:24:17,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35631 transitions. [2021-07-09 17:24:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:17,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:17,646 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:17,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:24:17,846 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:17,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:17,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1999770021, now seen corresponding path program 15 times [2021-07-09 17:24:17,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:17,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126333775] [2021-07-09 17:24:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:17,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:17,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126333775] [2021-07-09 17:24:17,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126333775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:17,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125419974] [2021-07-09 17:24:17,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:17,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:24:17,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:17,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:17,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125419974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:17,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:17,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:17,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362093015] [2021-07-09 17:24:17,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:17,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:17,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:17,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:17,961 INFO L87 Difference]: Start difference. First operand 8811 states and 35631 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:18,323 INFO L93 Difference]: Finished difference Result 11652 states and 45517 transitions. [2021-07-09 17:24:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:24:18,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:18,356 INFO L225 Difference]: With dead ends: 11652 [2021-07-09 17:24:18,357 INFO L226 Difference]: Without dead ends: 11632 [2021-07-09 17:24:18,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11632 states. [2021-07-09 17:24:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11632 to 8811. [2021-07-09 17:24:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.043246311010216) internal successors, (35621), 8810 states have internal predecessors, (35621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35621 transitions. [2021-07-09 17:24:18,674 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35621 transitions. Word has length 28 [2021-07-09 17:24:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:18,674 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35621 transitions. [2021-07-09 17:24:18,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35621 transitions. [2021-07-09 17:24:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:18,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:18,695 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:18,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:24:18,898 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:18,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:18,899 INFO L82 PathProgramCache]: Analyzing trace with hash 666916329, now seen corresponding path program 16 times [2021-07-09 17:24:18,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:18,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567260217] [2021-07-09 17:24:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:18,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:18,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567260217] [2021-07-09 17:24:18,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567260217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:18,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618360573] [2021-07-09 17:24:18,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:18,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:18,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:18,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:18,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:19,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618360573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:19,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:19,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:19,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927330537] [2021-07-09 17:24:19,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:19,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:19,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:19,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:19,031 INFO L87 Difference]: Start difference. First operand 8811 states and 35621 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:19,464 INFO L93 Difference]: Finished difference Result 13573 states and 53112 transitions. [2021-07-09 17:24:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:19,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:19,509 INFO L225 Difference]: With dead ends: 13573 [2021-07-09 17:24:19,509 INFO L226 Difference]: Without dead ends: 13573 [2021-07-09 17:24:19,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:24:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13573 states. [2021-07-09 17:24:19,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13573 to 8864. [2021-07-09 17:24:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.042423558614464) internal successors, (35828), 8863 states have internal predecessors, (35828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35828 transitions. [2021-07-09 17:24:19,767 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35828 transitions. Word has length 28 [2021-07-09 17:24:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:19,767 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35828 transitions. [2021-07-09 17:24:19,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35828 transitions. [2021-07-09 17:24:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:19,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:19,786 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:19,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:24:19,987 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1263312202, now seen corresponding path program 17 times [2021-07-09 17:24:19,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:19,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576022199] [2021-07-09 17:24:19,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:20,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:20,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:20,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576022199] [2021-07-09 17:24:20,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576022199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:20,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608106884] [2021-07-09 17:24:20,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:20,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:24:20,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:20,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:20,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608106884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:20,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:20,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:20,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143068876] [2021-07-09 17:24:20,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:20,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:20,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:20,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:20,113 INFO L87 Difference]: Start difference. First operand 8864 states and 35828 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:20,529 INFO L93 Difference]: Finished difference Result 14465 states and 55050 transitions. [2021-07-09 17:24:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:24:20,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:20,570 INFO L225 Difference]: With dead ends: 14465 [2021-07-09 17:24:20,570 INFO L226 Difference]: Without dead ends: 14437 [2021-07-09 17:24:20,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14437 states. [2021-07-09 17:24:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14437 to 8864. [2021-07-09 17:24:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.0412952724811015) internal successors, (35818), 8863 states have internal predecessors, (35818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35818 transitions. [2021-07-09 17:24:20,804 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35818 transitions. Word has length 28 [2021-07-09 17:24:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:20,804 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35818 transitions. [2021-07-09 17:24:20,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35818 transitions. [2021-07-09 17:24:20,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:20,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:20,821 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:21,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:24:21,022 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:21,022 INFO L82 PathProgramCache]: Analyzing trace with hash 198513879, now seen corresponding path program 18 times [2021-07-09 17:24:21,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:21,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001648521] [2021-07-09 17:24:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:21,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001648521] [2021-07-09 17:24:21,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001648521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313430992] [2021-07-09 17:24:21,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:21,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:24:21,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:21,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:21,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:21,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313430992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:21,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:21,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:24:21,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837780976] [2021-07-09 17:24:21,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:21,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:21,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:21,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:21,160 INFO L87 Difference]: Start difference. First operand 8864 states and 35818 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:21,929 INFO L93 Difference]: Finished difference Result 17059 states and 67264 transitions. [2021-07-09 17:24:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:24:21,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:21,985 INFO L225 Difference]: With dead ends: 17059 [2021-07-09 17:24:21,985 INFO L226 Difference]: Without dead ends: 17059 [2021-07-09 17:24:21,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:24:22,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17059 states. [2021-07-09 17:24:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17059 to 8917. [2021-07-09 17:24:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.040489008524002) internal successors, (36025), 8916 states have internal predecessors, (36025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36025 transitions. [2021-07-09 17:24:22,269 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36025 transitions. Word has length 28 [2021-07-09 17:24:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:22,269 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36025 transitions. [2021-07-09 17:24:22,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36025 transitions. [2021-07-09 17:24:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:22,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:22,288 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:22,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:22,489 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1200504206, now seen corresponding path program 19 times [2021-07-09 17:24:22,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:22,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217052301] [2021-07-09 17:24:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:22,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:22,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217052301] [2021-07-09 17:24:22,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217052301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:22,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925932921] [2021-07-09 17:24:22,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:22,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925932921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:22,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:22,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:24:22,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994136813] [2021-07-09 17:24:22,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:22,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:22,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:22,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:22,634 INFO L87 Difference]: Start difference. First operand 8917 states and 36025 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) [2021-07-09 17:24:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:23,206 INFO L93 Difference]: Finished difference Result 17336 states and 65142 transitions. [2021-07-09 17:24:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:24:23,207 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 28 [2021-07-09 17:24:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:23,256 INFO L225 Difference]: With dead ends: 17336 [2021-07-09 17:24:23,256 INFO L226 Difference]: Without dead ends: 17224 [2021-07-09 17:24:23,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:24:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17224 states. [2021-07-09 17:24:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17224 to 8917. [2021-07-09 17:24:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.039367429340511) internal successors, (36015), 8916 states have internal predecessors, (36015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36015 transitions. [2021-07-09 17:24:23,499 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36015 transitions. Word has length 28 [2021-07-09 17:24:23,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:23,499 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36015 transitions. [2021-07-09 17:24:23,499 INFO L483 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) [2021-07-09 17:24:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36015 transitions. [2021-07-09 17:24:23,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:23,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:23,516 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:23,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:23,718 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:23,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:23,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1319877997, now seen corresponding path program 20 times [2021-07-09 17:24:23,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:23,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331752044] [2021-07-09 17:24:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:23,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:23,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331752044] [2021-07-09 17:24:23,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331752044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:23,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492365288] [2021-07-09 17:24:23,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:23,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:23,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:23,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:23,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:23,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492365288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:23,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:23,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:24:23,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405915747] [2021-07-09 17:24:23,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:23,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:23,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:23,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:23,838 INFO L87 Difference]: Start difference. First operand 8917 states and 36015 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:24,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:24,676 INFO L93 Difference]: Finished difference Result 13676 states and 54158 transitions. [2021-07-09 17:24:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:24:24,677 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-07-09 17:24:24,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:24,729 INFO L225 Difference]: With dead ends: 13676 [2021-07-09 17:24:24,729 INFO L226 Difference]: Without dead ends: 13676 [2021-07-09 17:24:24,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 326.3ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:24:24,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13676 states. [2021-07-09 17:24:25,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13676 to 9131. [2021-07-09 17:24:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9130 states have (on average 4.022562979189485) internal successors, (36726), 9130 states have internal predecessors, (36726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 36726 transitions. [2021-07-09 17:24:25,094 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 36726 transitions. Word has length 28 [2021-07-09 17:24:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:25,094 INFO L482 AbstractCegarLoop]: Abstraction has 9131 states and 36726 transitions. [2021-07-09 17:24:25,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 36726 transitions. [2021-07-09 17:24:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:25,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:25,111 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:25,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 17:24:25,312 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1439601334, now seen corresponding path program 21 times [2021-07-09 17:24:25,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:25,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117560539] [2021-07-09 17:24:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:25,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:25,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117560539] [2021-07-09 17:24:25,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117560539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:25,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384397050] [2021-07-09 17:24:25,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:25,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:24:25,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:25,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:25,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384397050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:25,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:25,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:24:25,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539632959] [2021-07-09 17:24:25,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:25,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:25,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:25,437 INFO L87 Difference]: Start difference. First operand 9131 states and 36726 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:25,962 INFO L93 Difference]: Finished difference Result 15155 states and 56901 transitions. [2021-07-09 17:24:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:25,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-07-09 17:24:25,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:26,004 INFO L225 Difference]: With dead ends: 15155 [2021-07-09 17:24:26,004 INFO L226 Difference]: Without dead ends: 15043 [2021-07-09 17:24:26,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:24:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15043 states. [2021-07-09 17:24:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15043 to 9347. [2021-07-09 17:24:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9347 states, 9346 states have (on average 4.008238818745988) internal successors, (37461), 9346 states have internal predecessors, (37461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9347 states to 9347 states and 37461 transitions. [2021-07-09 17:24:26,252 INFO L78 Accepts]: Start accepts. Automaton has 9347 states and 37461 transitions. Word has length 28 [2021-07-09 17:24:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:26,252 INFO L482 AbstractCegarLoop]: Abstraction has 9347 states and 37461 transitions. [2021-07-09 17:24:26,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9347 states and 37461 transitions. [2021-07-09 17:24:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:26,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:26,272 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:26,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:26,473 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1045336016, now seen corresponding path program 22 times [2021-07-09 17:24:26,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:26,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553703150] [2021-07-09 17:24:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:26,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553703150] [2021-07-09 17:24:26,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553703150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493052314] [2021-07-09 17:24:26,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:26,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:26,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:26,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493052314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:26,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:26,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:26,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4132328] [2021-07-09 17:24:26,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:26,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:26,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:26,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:26,606 INFO L87 Difference]: Start difference. First operand 9347 states and 37461 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-07-09 17:24:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:27,257 INFO L93 Difference]: Finished difference Result 16354 states and 63144 transitions. [2021-07-09 17:24:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:24:27,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 28 [2021-07-09 17:24:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:27,303 INFO L225 Difference]: With dead ends: 16354 [2021-07-09 17:24:27,304 INFO L226 Difference]: Without dead ends: 16354 [2021-07-09 17:24:27,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:24:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16354 states. [2021-07-09 17:24:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16354 to 9241. [2021-07-09 17:24:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9240 states have (on average 3.997943722943723) internal successors, (36941), 9240 states have internal predecessors, (36941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 36941 transitions. [2021-07-09 17:24:27,545 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 36941 transitions. Word has length 28 [2021-07-09 17:24:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:27,545 INFO L482 AbstractCegarLoop]: Abstraction has 9241 states and 36941 transitions. [2021-07-09 17:24:27,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-07-09 17:24:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 36941 transitions. [2021-07-09 17:24:27,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:27,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:27,563 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:27,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 17:24:27,763 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:27,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1291785701, now seen corresponding path program 23 times [2021-07-09 17:24:27,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:27,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652188044] [2021-07-09 17:24:27,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:27,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:27,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652188044] [2021-07-09 17:24:27,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652188044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:27,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124355511] [2021-07-09 17:24:27,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:27,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:27,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:27,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:27,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:27,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124355511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:27,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:27,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:27,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987047344] [2021-07-09 17:24:27,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:27,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:27,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:27,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:27,893 INFO L87 Difference]: Start difference. First operand 9241 states and 36941 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:28,325 INFO L93 Difference]: Finished difference Result 12762 states and 48779 transitions. [2021-07-09 17:24:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:28,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:28,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:28,361 INFO L225 Difference]: With dead ends: 12762 [2021-07-09 17:24:28,361 INFO L226 Difference]: Without dead ends: 12722 [2021-07-09 17:24:28,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12722 states. [2021-07-09 17:24:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12722 to 8983. [2021-07-09 17:24:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8983 states, 8982 states have (on average 4.0035626809173905) internal successors, (35960), 8982 states have internal predecessors, (35960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 35960 transitions. [2021-07-09 17:24:28,566 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 35960 transitions. Word has length 28 [2021-07-09 17:24:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:28,566 INFO L482 AbstractCegarLoop]: Abstraction has 8983 states and 35960 transitions. [2021-07-09 17:24:28,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 35960 transitions. [2021-07-09 17:24:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:28,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:28,583 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:28,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:24:28,784 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1628155237, now seen corresponding path program 4 times [2021-07-09 17:24:28,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:28,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710256288] [2021-07-09 17:24:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:28,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:28,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710256288] [2021-07-09 17:24:28,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710256288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:28,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696632111] [2021-07-09 17:24:28,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:28,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:28,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:28,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:28,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:28,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696632111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:28,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:28,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:24:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492171622] [2021-07-09 17:24:28,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:28,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:28,912 INFO L87 Difference]: Start difference. First operand 8983 states and 35960 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:29,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:29,704 INFO L93 Difference]: Finished difference Result 30234 states and 120265 transitions. [2021-07-09 17:24:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:24:29,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-07-09 17:24:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:29,803 INFO L225 Difference]: With dead ends: 30234 [2021-07-09 17:24:29,804 INFO L226 Difference]: Without dead ends: 30234 [2021-07-09 17:24:29,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:24:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30234 states. [2021-07-09 17:24:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30234 to 14412. [2021-07-09 17:24:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14412 states, 14411 states have (on average 4.099715495107904) internal successors, (59081), 14411 states have internal predecessors, (59081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 59081 transitions. [2021-07-09 17:24:30,418 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 59081 transitions. Word has length 28 [2021-07-09 17:24:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:30,418 INFO L482 AbstractCegarLoop]: Abstraction has 14412 states and 59081 transitions. [2021-07-09 17:24:30,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 59081 transitions. [2021-07-09 17:24:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:30,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:30,449 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:30,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:24:30,649 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:30,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:30,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1254864512, now seen corresponding path program 5 times [2021-07-09 17:24:30,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:30,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336382731] [2021-07-09 17:24:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:30,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:30,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336382731] [2021-07-09 17:24:30,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336382731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:30,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807269163] [2021-07-09 17:24:30,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:30,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:24:30,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:30,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:30,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807269163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:30,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:30,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:24:30,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823723688] [2021-07-09 17:24:30,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:30,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:30,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:30,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:30,777 INFO L87 Difference]: Start difference. First operand 14412 states and 59081 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:31,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:31,577 INFO L93 Difference]: Finished difference Result 40819 states and 161536 transitions. [2021-07-09 17:24:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:24:31,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-07-09 17:24:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:31,710 INFO L225 Difference]: With dead ends: 40819 [2021-07-09 17:24:31,710 INFO L226 Difference]: Without dead ends: 40578 [2021-07-09 17:24:31,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:24:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40578 states. [2021-07-09 17:24:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40578 to 24036. [2021-07-09 17:24:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.249511129602663) internal successors, (102137), 24035 states have internal predecessors, (102137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 102137 transitions. [2021-07-09 17:24:32,467 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 102137 transitions. Word has length 28 [2021-07-09 17:24:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:32,467 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 102137 transitions. [2021-07-09 17:24:32,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:24:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 102137 transitions. [2021-07-09 17:24:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:32,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:32,519 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:32,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:24:32,720 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash 165103934, now seen corresponding path program 6 times [2021-07-09 17:24:32,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:32,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130605285] [2021-07-09 17:24:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:32,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:32,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130605285] [2021-07-09 17:24:32,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130605285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:32,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814737166] [2021-07-09 17:24:32,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:32,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:24:32,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:32,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:32,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:32,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814737166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:32,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:32,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:32,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143285183] [2021-07-09 17:24:32,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:32,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:32,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:32,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:32,834 INFO L87 Difference]: Start difference. First operand 24036 states and 102137 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2021-07-09 17:24:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:33,403 INFO L93 Difference]: Finished difference Result 42953 states and 171667 transitions. [2021-07-09 17:24:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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 28 [2021-07-09 17:24:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:33,560 INFO L225 Difference]: With dead ends: 42953 [2021-07-09 17:24:33,560 INFO L226 Difference]: Without dead ends: 42953 [2021-07-09 17:24:33,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:33,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42953 states. [2021-07-09 17:24:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42953 to 24036. [2021-07-09 17:24:34,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.228292074058665) internal successors, (101627), 24035 states have internal predecessors, (101627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 101627 transitions. [2021-07-09 17:24:34,505 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 101627 transitions. Word has length 28 [2021-07-09 17:24:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:34,505 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 101627 transitions. [2021-07-09 17:24:34,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2021-07-09 17:24:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 101627 transitions. [2021-07-09 17:24:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:34,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:34,565 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:34,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:24:34,769 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1784850851, now seen corresponding path program 7 times [2021-07-09 17:24:34,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:34,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657441666] [2021-07-09 17:24:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:34,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:34,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657441666] [2021-07-09 17:24:34,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657441666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:34,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938282838] [2021-07-09 17:24:34,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:24:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:34,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:34,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:34,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938282838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:34,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:34,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:34,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998514817] [2021-07-09 17:24:34,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:34,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:34,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:34,906 INFO L87 Difference]: Start difference. First operand 24036 states and 101627 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:35,288 INFO L93 Difference]: Finished difference Result 29179 states and 119232 transitions. [2021-07-09 17:24:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:24:35,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:35,394 INFO L225 Difference]: With dead ends: 29179 [2021-07-09 17:24:35,394 INFO L226 Difference]: Without dead ends: 29131 [2021-07-09 17:24:35,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:35,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29131 states. [2021-07-09 17:24:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29131 to 24202. [2021-07-09 17:24:36,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24202 states, 24201 states have (on average 4.223296557993471) internal successors, (102208), 24201 states have internal predecessors, (102208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:36,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24202 states to 24202 states and 102208 transitions. [2021-07-09 17:24:36,188 INFO L78 Accepts]: Start accepts. Automaton has 24202 states and 102208 transitions. Word has length 28 [2021-07-09 17:24:36,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:36,188 INFO L482 AbstractCegarLoop]: Abstraction has 24202 states and 102208 transitions. [2021-07-09 17:24:36,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 24202 states and 102208 transitions. [2021-07-09 17:24:36,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:36,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:36,245 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:36,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:36,446 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:36,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:36,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1672080553, now seen corresponding path program 8 times [2021-07-09 17:24:36,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:36,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894370677] [2021-07-09 17:24:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:36,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:36,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894370677] [2021-07-09 17:24:36,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894370677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:36,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876364320] [2021-07-09 17:24:36,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:36,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:36,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:36,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:36,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:36,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876364320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:36,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:36,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:36,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134377749] [2021-07-09 17:24:36,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:36,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:36,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:36,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:36,570 INFO L87 Difference]: Start difference. First operand 24202 states and 102208 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) [2021-07-09 17:24:36,829 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-09 17:24:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:37,456 INFO L93 Difference]: Finished difference Result 49310 states and 196485 transitions. [2021-07-09 17:24:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:24:37,457 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 28 [2021-07-09 17:24:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:37,651 INFO L225 Difference]: With dead ends: 49310 [2021-07-09 17:24:37,651 INFO L226 Difference]: Without dead ends: 49310 [2021-07-09 17:24:37,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49310 states. [2021-07-09 17:24:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49310 to 24542. [2021-07-09 17:24:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.213683223992502) internal successors, (103408), 24541 states have internal predecessors, (103408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103408 transitions. [2021-07-09 17:24:38,699 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103408 transitions. Word has length 28 [2021-07-09 17:24:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:38,700 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103408 transitions. [2021-07-09 17:24:38,700 INFO L483 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) [2021-07-09 17:24:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103408 transitions. [2021-07-09 17:24:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:38,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:38,760 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:38,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:24:38,961 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:38,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1854451132, now seen corresponding path program 9 times [2021-07-09 17:24:38,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:38,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352571596] [2021-07-09 17:24:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:38,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:38,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352571596] [2021-07-09 17:24:38,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352571596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:38,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763459176] [2021-07-09 17:24:38,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:39,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:24:39,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:39,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:39,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:39,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763459176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:39,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:39,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:39,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915241783] [2021-07-09 17:24:39,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:39,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:39,092 INFO L87 Difference]: Start difference. First operand 24542 states and 103408 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) [2021-07-09 17:24:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:40,056 INFO L93 Difference]: Finished difference Result 43190 states and 171488 transitions. [2021-07-09 17:24:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:24:40,056 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 28 [2021-07-09 17:24:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:40,214 INFO L225 Difference]: With dead ends: 43190 [2021-07-09 17:24:40,214 INFO L226 Difference]: Without dead ends: 43115 [2021-07-09 17:24:40,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43115 states. [2021-07-09 17:24:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43115 to 24542. [2021-07-09 17:24:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.212705268733956) internal successors, (103384), 24541 states have internal predecessors, (103384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103384 transitions. [2021-07-09 17:24:41,136 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103384 transitions. Word has length 28 [2021-07-09 17:24:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:41,136 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103384 transitions. [2021-07-09 17:24:41,137 INFO L483 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) [2021-07-09 17:24:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103384 transitions. [2021-07-09 17:24:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:41,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:41,188 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:41,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-09 17:24:41,389 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:41,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:41,389 INFO L82 PathProgramCache]: Analyzing trace with hash 975011082, now seen corresponding path program 10 times [2021-07-09 17:24:41,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:41,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310136337] [2021-07-09 17:24:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:41,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:41,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310136337] [2021-07-09 17:24:41,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310136337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592322463] [2021-07-09 17:24:41,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:41,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:41,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:41,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:41,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:41,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592322463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:41,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:41,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170850366] [2021-07-09 17:24:41,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:41,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:41,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:41,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:41,523 INFO L87 Difference]: Start difference. First operand 24542 states and 103384 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) [2021-07-09 17:24:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:42,501 INFO L93 Difference]: Finished difference Result 51588 states and 205543 transitions. [2021-07-09 17:24:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:42,501 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 28 [2021-07-09 17:24:42,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:42,874 INFO L225 Difference]: With dead ends: 51588 [2021-07-09 17:24:42,874 INFO L226 Difference]: Without dead ends: 51588 [2021-07-09 17:24:42,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51588 states. [2021-07-09 17:24:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51588 to 24882. [2021-07-09 17:24:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.210200554640087) internal successors, (104754), 24881 states have internal predecessors, (104754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104754 transitions. [2021-07-09 17:24:43,926 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104754 transitions. Word has length 28 [2021-07-09 17:24:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:43,926 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104754 transitions. [2021-07-09 17:24:43,926 INFO L483 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) [2021-07-09 17:24:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104754 transitions. [2021-07-09 17:24:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:43,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:43,989 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:44,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:44,201 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:44,201 INFO L82 PathProgramCache]: Analyzing trace with hash -974943703, now seen corresponding path program 11 times [2021-07-09 17:24:44,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:44,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612084099] [2021-07-09 17:24:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:44,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:44,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612084099] [2021-07-09 17:24:44,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612084099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:44,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032240829] [2021-07-09 17:24:44,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:44,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:24:44,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:44,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:44,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:44,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032240829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:44,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:44,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:44,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744764322] [2021-07-09 17:24:44,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:44,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:44,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:44,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:44,333 INFO L87 Difference]: Start difference. First operand 24882 states and 104754 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:45,076 INFO L93 Difference]: Finished difference Result 39744 states and 158044 transitions. [2021-07-09 17:24:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:45,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:45,229 INFO L225 Difference]: With dead ends: 39744 [2021-07-09 17:24:45,229 INFO L226 Difference]: Without dead ends: 39696 [2021-07-09 17:24:45,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:45,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39696 states. [2021-07-09 17:24:45,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39696 to 24882. [2021-07-09 17:24:45,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.209235963184759) internal successors, (104730), 24881 states have internal predecessors, (104730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104730 transitions. [2021-07-09 17:24:46,092 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104730 transitions. Word has length 28 [2021-07-09 17:24:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:46,092 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104730 transitions. [2021-07-09 17:24:46,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104730 transitions. [2021-07-09 17:24:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:46,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:46,150 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:46,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 17:24:46,351 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:46,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:46,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1393922136, now seen corresponding path program 12 times [2021-07-09 17:24:46,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:46,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982396905] [2021-07-09 17:24:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:46,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:46,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982396905] [2021-07-09 17:24:46,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982396905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:46,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536002923] [2021-07-09 17:24:46,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:46,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:24:46,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:46,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:46,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:46,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536002923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:46,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:46,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:46,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777943901] [2021-07-09 17:24:46,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:46,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:46,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:46,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:46,479 INFO L87 Difference]: Start difference. First operand 24882 states and 104730 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-09 17:24:46,891 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-07-09 17:24:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:47,870 INFO L93 Difference]: Finished difference Result 51567 states and 205376 transitions. [2021-07-09 17:24:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:24:47,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 28 [2021-07-09 17:24:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:48,105 INFO L225 Difference]: With dead ends: 51567 [2021-07-09 17:24:48,106 INFO L226 Difference]: Without dead ends: 51567 [2021-07-09 17:24:48,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:24:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51567 states. [2021-07-09 17:24:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51567 to 25308. [2021-07-09 17:24:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25308 states, 25307 states have (on average 4.182123523135891) internal successors, (105837), 25307 states have internal predecessors, (105837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25308 states to 25308 states and 105837 transitions. [2021-07-09 17:24:49,452 INFO L78 Accepts]: Start accepts. Automaton has 25308 states and 105837 transitions. Word has length 28 [2021-07-09 17:24:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:49,452 INFO L482 AbstractCegarLoop]: Abstraction has 25308 states and 105837 transitions. [2021-07-09 17:24:49,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-09 17:24:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 25308 states and 105837 transitions. [2021-07-09 17:24:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:49,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:49,526 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:49,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:49,727 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:49,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:49,727 INFO L82 PathProgramCache]: Analyzing trace with hash 770340333, now seen corresponding path program 13 times [2021-07-09 17:24:49,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:49,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688126866] [2021-07-09 17:24:49,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:49,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:49,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688126866] [2021-07-09 17:24:49,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688126866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:49,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139572894] [2021-07-09 17:24:49,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:24:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:49,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:49,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:49,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139572894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:49,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:49,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:49,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984941629] [2021-07-09 17:24:49,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:49,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:49,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:49,872 INFO L87 Difference]: Start difference. First operand 25308 states and 105837 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:50,903 INFO L93 Difference]: Finished difference Result 35545 states and 141251 transitions. [2021-07-09 17:24:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:50,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:51,251 INFO L225 Difference]: With dead ends: 35545 [2021-07-09 17:24:51,251 INFO L226 Difference]: Without dead ends: 35497 [2021-07-09 17:24:51,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35497 states. [2021-07-09 17:24:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35497 to 25624. [2021-07-09 17:24:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.173633064044023) internal successors, (106941), 25623 states have internal predecessors, (106941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:52,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106941 transitions. [2021-07-09 17:24:52,162 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106941 transitions. Word has length 28 [2021-07-09 17:24:52,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:52,162 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106941 transitions. [2021-07-09 17:24:52,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:52,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106941 transitions. [2021-07-09 17:24:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:52,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:52,452 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:52,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 17:24:52,654 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:52,658 INFO L82 PathProgramCache]: Analyzing trace with hash 778555929, now seen corresponding path program 14 times [2021-07-09 17:24:52,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:52,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080464077] [2021-07-09 17:24:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:52,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:52,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080464077] [2021-07-09 17:24:52,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080464077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:52,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708631132] [2021-07-09 17:24:52,683 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 [2021-07-09 17:24:52,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:52,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:52,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:52,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:52,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708631132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:52,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:52,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:52,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969133766] [2021-07-09 17:24:52,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:52,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:52,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:52,783 INFO L87 Difference]: Start difference. First operand 25624 states and 106941 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:53,746 INFO L93 Difference]: Finished difference Result 46151 states and 182270 transitions. [2021-07-09 17:24:53,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:53,747 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:53,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:53,966 INFO L225 Difference]: With dead ends: 46151 [2021-07-09 17:24:53,966 INFO L226 Difference]: Without dead ends: 46151 [2021-07-09 17:24:53,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46151 states. [2021-07-09 17:24:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46151 to 25624. [2021-07-09 17:24:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166998399875112) internal successors, (106771), 25623 states have internal predecessors, (106771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106771 transitions. [2021-07-09 17:24:55,175 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106771 transitions. Word has length 28 [2021-07-09 17:24:55,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:55,176 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106771 transitions. [2021-07-09 17:24:55,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:55,176 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106771 transitions. [2021-07-09 17:24:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:55,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:55,242 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:55,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:24:55,442 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:55,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1546991540, now seen corresponding path program 15 times [2021-07-09 17:24:55,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:55,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846827133] [2021-07-09 17:24:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:55,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:55,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846827133] [2021-07-09 17:24:55,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846827133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:55,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139906103] [2021-07-09 17:24:55,471 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 [2021-07-09 17:24:55,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:24:55,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:55,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:55,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:55,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139906103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:55,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:55,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:55,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509336105] [2021-07-09 17:24:55,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:55,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:55,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:55,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:55,571 INFO L87 Difference]: Start difference. First operand 25624 states and 106771 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:56,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:56,277 INFO L93 Difference]: Finished difference Result 32707 states and 131617 transitions. [2021-07-09 17:24:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:24:56,277 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:24:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:56,405 INFO L225 Difference]: With dead ends: 32707 [2021-07-09 17:24:56,405 INFO L226 Difference]: Without dead ends: 32682 [2021-07-09 17:24:56,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32682 states. [2021-07-09 17:24:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32682 to 25624. [2021-07-09 17:24:57,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166530070639659) internal successors, (106759), 25623 states have internal predecessors, (106759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106759 transitions. [2021-07-09 17:24:57,391 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106759 transitions. Word has length 28 [2021-07-09 17:24:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:57,391 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106759 transitions. [2021-07-09 17:24:57,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:57,391 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106759 transitions. [2021-07-09 17:24:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:57,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:57,454 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:57,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:24:57,654 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:57,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:57,654 INFO L82 PathProgramCache]: Analyzing trace with hash 81486458, now seen corresponding path program 16 times [2021-07-09 17:24:57,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:57,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719696045] [2021-07-09 17:24:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:57,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:57,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719696045] [2021-07-09 17:24:57,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719696045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:57,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511011547] [2021-07-09 17:24:57,675 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 [2021-07-09 17:24:57,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:57,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:57,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:57,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511011547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:57,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:57,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:57,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485489980] [2021-07-09 17:24:57,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:57,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:57,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:57,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:57,766 INFO L87 Difference]: Start difference. First operand 25624 states and 106759 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2021-07-09 17:24:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:58,435 INFO L93 Difference]: Finished difference Result 38112 states and 153561 transitions. [2021-07-09 17:24:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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 28 [2021-07-09 17:24:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:58,567 INFO L225 Difference]: With dead ends: 38112 [2021-07-09 17:24:58,567 INFO L226 Difference]: Without dead ends: 38112 [2021-07-09 17:24:58,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:24:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38112 states. [2021-07-09 17:24:59,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38112 to 25794. [2021-07-09 17:24:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.1656263327259335) internal successors, (107444), 25793 states have internal predecessors, (107444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107444 transitions. [2021-07-09 17:24:59,317 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107444 transitions. Word has length 28 [2021-07-09 17:24:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:59,317 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107444 transitions. [2021-07-09 17:24:59,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2021-07-09 17:24:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107444 transitions. [2021-07-09 17:24:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:24:59,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:59,557 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:59,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 17:24:59,757 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:59,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1868468327, now seen corresponding path program 17 times [2021-07-09 17:24:59,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:59,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884786270] [2021-07-09 17:24:59,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:59,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:59,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884786270] [2021-07-09 17:24:59,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884786270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:59,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547317817] [2021-07-09 17:24:59,778 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 [2021-07-09 17:24:59,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:24:59,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:59,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:59,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547317817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:59,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:59,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:59,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810608947] [2021-07-09 17:24:59,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:59,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:59,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:59,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:59,885 INFO L87 Difference]: Start difference. First operand 25794 states and 107444 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:00,506 INFO L93 Difference]: Finished difference Result 39804 states and 156168 transitions. [2021-07-09 17:25:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:25:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:25:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:00,856 INFO L225 Difference]: With dead ends: 39804 [2021-07-09 17:25:00,856 INFO L226 Difference]: Without dead ends: 39780 [2021-07-09 17:25:00,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:25:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39780 states. [2021-07-09 17:25:01,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39780 to 25794. [2021-07-09 17:25:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.165161090218276) internal successors, (107432), 25793 states have internal predecessors, (107432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107432 transitions. [2021-07-09 17:25:01,752 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107432 transitions. Word has length 28 [2021-07-09 17:25:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:01,752 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107432 transitions. [2021-07-09 17:25:01,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107432 transitions. [2021-07-09 17:25:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:25:01,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:01,829 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:02,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:02,030 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:02,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:02,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2007520536, now seen corresponding path program 18 times [2021-07-09 17:25:02,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:02,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549221829] [2021-07-09 17:25:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:02,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:02,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549221829] [2021-07-09 17:25:02,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549221829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:02,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257014100] [2021-07-09 17:25:02,057 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 [2021-07-09 17:25:02,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:25:02,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:02,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:02,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:02,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257014100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:02,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:02,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:25:02,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616107976] [2021-07-09 17:25:02,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:02,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:02,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:02,150 INFO L87 Difference]: Start difference. First operand 25794 states and 107432 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-07-09 17:25:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:03,357 INFO L93 Difference]: Finished difference Result 48289 states and 195910 transitions. [2021-07-09 17:25:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:25:03,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 28 [2021-07-09 17:25:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:03,600 INFO L225 Difference]: With dead ends: 48289 [2021-07-09 17:25:03,600 INFO L226 Difference]: Without dead ends: 48289 [2021-07-09 17:25:03,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:25:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48289 states. [2021-07-09 17:25:04,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48289 to 25964. [2021-07-09 17:25:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.164272233563148) internal successors, (108117), 25963 states have internal predecessors, (108117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108117 transitions. [2021-07-09 17:25:04,603 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108117 transitions. Word has length 28 [2021-07-09 17:25:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:04,603 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108117 transitions. [2021-07-09 17:25:04,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-07-09 17:25:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108117 transitions. [2021-07-09 17:25:04,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:25:04,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:04,671 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:04,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 17:25:04,872 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:04,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:04,872 INFO L82 PathProgramCache]: Analyzing trace with hash -123184291, now seen corresponding path program 19 times [2021-07-09 17:25:04,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:04,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236578389] [2021-07-09 17:25:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:04,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:04,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236578389] [2021-07-09 17:25:04,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236578389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:04,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822846695] [2021-07-09 17:25:04,905 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 [2021-07-09 17:25:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:04,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:05,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822846695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:05,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:05,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:25:05,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124096529] [2021-07-09 17:25:05,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:05,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:05,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:05,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:05,200 INFO L87 Difference]: Start difference. First operand 25964 states and 108117 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) [2021-07-09 17:25:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:05,994 INFO L93 Difference]: Finished difference Result 47194 states and 183148 transitions. [2021-07-09 17:25:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:25:05,995 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 28 [2021-07-09 17:25:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:06,384 INFO L225 Difference]: With dead ends: 47194 [2021-07-09 17:25:06,384 INFO L226 Difference]: Without dead ends: 47098 [2021-07-09 17:25:06,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:25:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47098 states. [2021-07-09 17:25:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47098 to 25964. [2021-07-09 17:25:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.16381003736086) internal successors, (108105), 25963 states have internal predecessors, (108105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:07,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108105 transitions. [2021-07-09 17:25:07,381 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108105 transitions. Word has length 28 [2021-07-09 17:25:07,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:07,381 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108105 transitions. [2021-07-09 17:25:07,381 INFO L483 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) [2021-07-09 17:25:07,381 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108105 transitions. [2021-07-09 17:25:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:25:07,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:07,450 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:07,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:07,650 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:07,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:07,651 INFO L82 PathProgramCache]: Analyzing trace with hash 740063358, now seen corresponding path program 20 times [2021-07-09 17:25:07,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:07,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225723326] [2021-07-09 17:25:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:07,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:07,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225723326] [2021-07-09 17:25:07,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225723326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:07,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856875712] [2021-07-09 17:25:07,685 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 [2021-07-09 17:25:07,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:07,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:07,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:07,969 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-09 17:25:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:08,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856875712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:08,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:08,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:25:08,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594383293] [2021-07-09 17:25:08,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:08,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:08,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:08,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:08,025 INFO L87 Difference]: Start difference. First operand 25964 states and 108105 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:25:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:09,160 INFO L93 Difference]: Finished difference Result 38914 states and 158503 transitions. [2021-07-09 17:25:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:25:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-07-09 17:25:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:09,310 INFO L225 Difference]: With dead ends: 38914 [2021-07-09 17:25:09,310 INFO L226 Difference]: Without dead ends: 38914 [2021-07-09 17:25:09,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:25:09,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38914 states. [2021-07-09 17:25:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38914 to 26620. [2021-07-09 17:25:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26620 states, 26619 states have (on average 4.1402381757391336) internal successors, (110209), 26619 states have internal predecessors, (110209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:10,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26620 states to 26620 states and 110209 transitions. [2021-07-09 17:25:10,100 INFO L78 Accepts]: Start accepts. Automaton has 26620 states and 110209 transitions. Word has length 28 [2021-07-09 17:25:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:10,101 INFO L482 AbstractCegarLoop]: Abstraction has 26620 states and 110209 transitions. [2021-07-09 17:25:10,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:25:10,101 INFO L276 IsEmpty]: Start isEmpty. Operand 26620 states and 110209 transitions. [2021-07-09 17:25:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:25:10,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:10,176 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:10,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:10,378 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:10,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1153142681, now seen corresponding path program 21 times [2021-07-09 17:25:10,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:10,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645994504] [2021-07-09 17:25:10,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:10,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:10,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645994504] [2021-07-09 17:25:10,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645994504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:10,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893797955] [2021-07-09 17:25:10,408 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 [2021-07-09 17:25:10,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:25:10,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:10,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:10,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:10,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893797955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:10,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:10,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:25:10,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502521715] [2021-07-09 17:25:10,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:10,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:10,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:10,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:10,492 INFO L87 Difference]: Start difference. First operand 26620 states and 110209 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:25:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:11,439 INFO L93 Difference]: Finished difference Result 41610 states and 161108 transitions. [2021-07-09 17:25:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:25:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-07-09 17:25:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:11,599 INFO L225 Difference]: With dead ends: 41610 [2021-07-09 17:25:11,599 INFO L226 Difference]: Without dead ends: 41514 [2021-07-09 17:25:11,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:25:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41514 states. [2021-07-09 17:25:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41514 to 27244. [2021-07-09 17:25:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27244 states, 27243 states have (on average 4.125646955181147) internal successors, (112395), 27243 states have internal predecessors, (112395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27244 states to 27244 states and 112395 transitions. [2021-07-09 17:25:12,783 INFO L78 Accepts]: Start accepts. Automaton has 27244 states and 112395 transitions. Word has length 28 [2021-07-09 17:25:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:12,783 INFO L482 AbstractCegarLoop]: Abstraction has 27244 states and 112395 transitions. [2021-07-09 17:25:12,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-07-09 17:25:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 27244 states and 112395 transitions. [2021-07-09 17:25:12,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:25:12,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:12,874 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:13,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 17:25:13,089 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:13,089 INFO L82 PathProgramCache]: Analyzing trace with hash -73330929, now seen corresponding path program 22 times [2021-07-09 17:25:13,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:13,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300902887] [2021-07-09 17:25:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:13,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:13,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300902887] [2021-07-09 17:25:13,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300902887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:13,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852299181] [2021-07-09 17:25:13,116 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 [2021-07-09 17:25:13,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:13,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:13,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:13,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:13,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852299181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:13,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:13,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:25:13,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173232138] [2021-07-09 17:25:13,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:13,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:13,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:13,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:13,226 INFO L87 Difference]: Start difference. First operand 27244 states and 112395 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) [2021-07-09 17:25:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:14,371 INFO L93 Difference]: Finished difference Result 48209 states and 191672 transitions. [2021-07-09 17:25:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:25:14,372 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 28 [2021-07-09 17:25:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:14,569 INFO L225 Difference]: With dead ends: 48209 [2021-07-09 17:25:14,569 INFO L226 Difference]: Without dead ends: 48209 [2021-07-09 17:25:14,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:25:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48209 states. [2021-07-09 17:25:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48209 to 26904. [2021-07-09 17:25:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26904 states, 26903 states have (on average 4.114225179348028) internal successors, (110685), 26903 states have internal predecessors, (110685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:15,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 110685 transitions. [2021-07-09 17:25:15,701 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 110685 transitions. Word has length 28 [2021-07-09 17:25:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:15,701 INFO L482 AbstractCegarLoop]: Abstraction has 26904 states and 110685 transitions. [2021-07-09 17:25:15,702 INFO L483 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) [2021-07-09 17:25:15,702 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 110685 transitions. [2021-07-09 17:25:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:25:15,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:15,772 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:15,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:15,980 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:15,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1673828536, now seen corresponding path program 23 times [2021-07-09 17:25:15,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:15,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372570129] [2021-07-09 17:25:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:16,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:16,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372570129] [2021-07-09 17:25:16,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372570129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:16,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395232805] [2021-07-09 17:25:16,004 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 [2021-07-09 17:25:16,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:16,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:16,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:16,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:16,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395232805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:16,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:16,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:25:16,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131813381] [2021-07-09 17:25:16,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:16,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:16,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:16,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:16,107 INFO L87 Difference]: Start difference. First operand 26904 states and 110685 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-07-09 17:25:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:16,921 INFO L93 Difference]: Finished difference Result 35478 states and 139558 transitions. [2021-07-09 17:25:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:25:16,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 28 [2021-07-09 17:25:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:17,044 INFO L225 Difference]: With dead ends: 35478 [2021-07-09 17:25:17,045 INFO L226 Difference]: Without dead ends: 35428 [2021-07-09 17:25:17,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35428 states. [2021-07-09 17:25:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35428 to 26239. [2021-07-09 17:25:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26239 states, 26238 states have (on average 4.115595700891836) internal successors, (107985), 26238 states have internal predecessors, (107985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26239 states to 26239 states and 107985 transitions. [2021-07-09 17:25:17,931 INFO L78 Accepts]: Start accepts. Automaton has 26239 states and 107985 transitions. Word has length 28 [2021-07-09 17:25:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:17,931 INFO L482 AbstractCegarLoop]: Abstraction has 26239 states and 107985 transitions. [2021-07-09 17:25:17,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-07-09 17:25:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 26239 states and 107985 transitions. [2021-07-09 17:25:18,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:25:18,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:18,162 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:18,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 17:25:18,363 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:18,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:18,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1595574120, now seen corresponding path program 24 times [2021-07-09 17:25:18,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:18,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317750450] [2021-07-09 17:25:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:18,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:18,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317750450] [2021-07-09 17:25:18,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317750450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:18,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374019885] [2021-07-09 17:25:18,437 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 [2021-07-09 17:25:18,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:25:18,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:18,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:25:18,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:18,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374019885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:18,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:18,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-07-09 17:25:18,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368487680] [2021-07-09 17:25:18,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:18,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:18,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:18,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:18,820 INFO L87 Difference]: Start difference. First operand 26239 states and 107985 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) [2021-07-09 17:25:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:19,580 INFO L93 Difference]: Finished difference Result 29258 states and 119012 transitions. [2021-07-09 17:25:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:25:19,581 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 31 [2021-07-09 17:25:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:19,679 INFO L225 Difference]: With dead ends: 29258 [2021-07-09 17:25:19,679 INFO L226 Difference]: Without dead ends: 29122 [2021-07-09 17:25:19,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-07-09 17:25:20,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 26985. [2021-07-09 17:25:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26985 states, 26984 states have (on average 4.111139934776164) internal successors, (110935), 26984 states have internal predecessors, (110935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26985 states to 26985 states and 110935 transitions. [2021-07-09 17:25:20,431 INFO L78 Accepts]: Start accepts. Automaton has 26985 states and 110935 transitions. Word has length 31 [2021-07-09 17:25:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:20,431 INFO L482 AbstractCegarLoop]: Abstraction has 26985 states and 110935 transitions. [2021-07-09 17:25:20,431 INFO L483 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) [2021-07-09 17:25:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 26985 states and 110935 transitions. [2021-07-09 17:25:20,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:25:20,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:20,503 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:20,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:20,703 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:20,704 INFO L82 PathProgramCache]: Analyzing trace with hash -457978980, now seen corresponding path program 25 times [2021-07-09 17:25:20,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:20,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002245418] [2021-07-09 17:25:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:20,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:20,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002245418] [2021-07-09 17:25:20,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002245418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:20,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407581963] [2021-07-09 17:25:20,755 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 [2021-07-09 17:25:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:20,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:25:20,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:21,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407581963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:21,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:21,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-07-09 17:25:21,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457701161] [2021-07-09 17:25:21,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:25:21,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:21,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:25:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:21,190 INFO L87 Difference]: Start difference. First operand 26985 states and 110935 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) [2021-07-09 17:25:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:22,105 INFO L93 Difference]: Finished difference Result 30378 states and 123415 transitions. [2021-07-09 17:25:22,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:25:22,106 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 31 [2021-07-09 17:25:22,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:22,216 INFO L225 Difference]: With dead ends: 30378 [2021-07-09 17:25:22,216 INFO L226 Difference]: Without dead ends: 30174 [2021-07-09 17:25:22,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:22,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30174 states. [2021-07-09 17:25:23,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30174 to 27681. [2021-07-09 17:25:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27681 states, 27680 states have (on average 4.11296965317919) internal successors, (113847), 27680 states have internal predecessors, (113847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27681 states to 27681 states and 113847 transitions. [2021-07-09 17:25:23,159 INFO L78 Accepts]: Start accepts. Automaton has 27681 states and 113847 transitions. Word has length 31 [2021-07-09 17:25:23,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:23,159 INFO L482 AbstractCegarLoop]: Abstraction has 27681 states and 113847 transitions. [2021-07-09 17:25:23,159 INFO L483 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) [2021-07-09 17:25:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 27681 states and 113847 transitions. [2021-07-09 17:25:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:25:23,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:23,226 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:23,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 17:25:23,427 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:23,427 INFO L82 PathProgramCache]: Analyzing trace with hash 383912552, now seen corresponding path program 26 times [2021-07-09 17:25:23,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:23,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845935882] [2021-07-09 17:25:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:25:23,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:23,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845935882] [2021-07-09 17:25:23,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845935882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:23,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482527877] [2021-07-09 17:25:23,476 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 [2021-07-09 17:25:23,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:23,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:23,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:25:23,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:23,736 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-07-09 17:25:23,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 17:25:23,955 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:408) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:597) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-07-09 17:25:23,961 INFO L168 Benchmark]: Toolchain (without parser) took 87735.44 ms. Allocated memory was 213.9 MB in the beginning and 7.7 GB in the end (delta: 7.4 GB). Free memory was 194.0 MB in the beginning and 6.3 GB in the end (delta: -6.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-07-09 17:25:23,962 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 213.9 MB. Free memory is still 195.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:25:23,962 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.63 ms. Allocated memory is still 213.9 MB. Free memory was 193.8 MB in the beginning and 192.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:25:23,962 INFO L168 Benchmark]: Boogie Preprocessor took 14.62 ms. Allocated memory is still 213.9 MB. Free memory was 192.4 MB in the beginning and 191.5 MB in the end (delta: 937.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:25:23,962 INFO L168 Benchmark]: RCFGBuilder took 198.77 ms. Allocated memory is still 213.9 MB. Free memory was 191.3 MB in the beginning and 179.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-09 17:25:23,963 INFO L168 Benchmark]: TraceAbstraction took 87498.73 ms. Allocated memory was 213.9 MB in the beginning and 7.7 GB in the end (delta: 7.4 GB). Free memory was 179.1 MB in the beginning and 6.3 GB in the end (delta: -6.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-07-09 17:25:23,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 213.9 MB. Free memory is still 195.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.63 ms. Allocated memory is still 213.9 MB. Free memory was 193.8 MB in the beginning and 192.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.62 ms. Allocated memory is still 213.9 MB. Free memory was 192.4 MB in the beginning and 191.5 MB in the end (delta: 937.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 198.77 ms. Allocated memory is still 213.9 MB. Free memory was 191.3 MB in the beginning and 179.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 87498.73 ms. Allocated memory was 213.9 MB in the beginning and 7.7 GB in the end (delta: 7.4 GB). Free memory was 179.1 MB in the beginning and 6.3 GB in the end (delta: -6.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...