/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/popl20/simple-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:09:21,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:09:21,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:09:21,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 18:09:21,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 18:09:21,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 18:09:21,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 18:09:21,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 18:09:21,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 18:09:21,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 18:09:21,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 18:09:21,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 18:09:21,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:09:21,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:09:21,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:09:21,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:09:21,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:09:21,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:09:21,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:09:21,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:09:21,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:09:21,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:09:21,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:09:21,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:09:21,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 18:09:21,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 18:09:21,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 18:09:21,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 18:09:21,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 18:09:21,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 18:09:21,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 18:09:21,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 18:09:21,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 18:09:21,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 18:09:21,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 18:09:21,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 18:09:21,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 18:09:21,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 18:09:21,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:09:21,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:09:21,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:09:21,289 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 18:09:21,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:09:21,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:09:21,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:09:21,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:09:21,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:09:21,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:09:21,328 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:09:21,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:09:21,329 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:09:21,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:09:21,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:09:21,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:09:21,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:09:21,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:09:21,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:09:21,331 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:09:21,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:09:21,331 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:09:21,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:09:21,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:09:21,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:09:21,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:09:21,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:09:21,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:09:21,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:09:21,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:09:21,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:09:21,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:09:21,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:09:21,333 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:09:21,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:09:21,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:09:21,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:09:21,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:09:21,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:09:21,688 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:09:21,689 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:09:21,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl [2021-07-09 18:09:21,690 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2021-07-09 18:09:21,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:09:21,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:09:21,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:09:21,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:09:21,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:09:21,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:21" (1/1) ... [2021-07-09 18:09:21,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:21" (1/1) ... [2021-07-09 18:09:21,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:09:21,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:09:21,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:09:21,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:09:21,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:21" (1/1) ... [2021-07-09 18:09:21,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:21" (1/1) ... [2021-07-09 18:09:21,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:21" (1/1) ... [2021-07-09 18:09:21,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:21" (1/1) ... [2021-07-09 18:09:21,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:21" (1/1) ... [2021-07-09 18:09:21,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:21" (1/1) ... [2021-07-09 18:09:21,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:21" (1/1) ... [2021-07-09 18:09:21,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:09:21,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:09:21,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:09:21,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:09:21,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:21" (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 18:09:21,865 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:09:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:09:21,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:09:21,865 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:09:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:09:21,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:09:21,866 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:09:21,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:09:21,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:09:21,866 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 18:09:22,004 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:09:22,004 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-09 18:09:22,005 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 18:09:22,005 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-09 18:09:22,006 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:09:22 BoogieIcfgContainer [2021-07-09 18:09:22,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:09:22,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:09:22,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:09:22,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:09:22,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:21" (1/2) ... [2021-07-09 18:09:22,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df665fd and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:09:22, skipping insertion in model container [2021-07-09 18:09:22,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:09:22" (2/2) ... [2021-07-09 18:09:22,014 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2021-07-09 18:09:22,022 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:09:22,022 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:09:22,022 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:09:22,023 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:09:22,050 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 18:09:22,070 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 18:09:22,089 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:09:22,090 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:09:22,090 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:09:22,090 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:09:22,090 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:09:22,090 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:09:22,090 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:09:22,090 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:09:22,098 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-07-09 18:09:22,107 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:22,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-09 18:09:22,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:22,138 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:22,139 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:22,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:22,143 INFO L82 PathProgramCache]: Analyzing trace with hash -262068682, now seen corresponding path program 1 times [2021-07-09 18:09:22,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:22,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353638376] [2021-07-09 18:09:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:22,306 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 18:09:22,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:22,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353638376] [2021-07-09 18:09:22,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353638376] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:09:22,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:09:22,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:09:22,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159381195] [2021-07-09 18:09:22,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:09:22,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:22,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:09:22,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:09:22,325 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 18:09:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:22,348 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-07-09 18:09:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:09:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-07-09 18:09:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:22,357 INFO L225 Difference]: With dead ends: 20 [2021-07-09 18:09:22,357 INFO L226 Difference]: Without dead ends: 16 [2021-07-09 18:09:22,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:09:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-07-09 18:09:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-07-09 18:09:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-07-09 18:09:22,394 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-07-09 18:09:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:22,394 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-07-09 18:09:22,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 18:09:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-07-09 18:09:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 18:09:22,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:22,395 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:22,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:09:22,396 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:22,401 INFO L82 PathProgramCache]: Analyzing trace with hash 488876151, now seen corresponding path program 1 times [2021-07-09 18:09:22,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:22,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463350100] [2021-07-09 18:09:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:22,463 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 18:09:22,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:22,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463350100] [2021-07-09 18:09:22,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463350100] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:09:22,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:09:22,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:09:22,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212518477] [2021-07-09 18:09:22,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:09:22,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:22,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:09:22,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:09:22,466 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 18:09:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:22,478 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-07-09 18:09:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:09:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-09 18:09:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:22,480 INFO L225 Difference]: With dead ends: 21 [2021-07-09 18:09:22,480 INFO L226 Difference]: Without dead ends: 18 [2021-07-09 18:09:22,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:09:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-09 18:09:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-09 18:09:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-07-09 18:09:22,484 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-07-09 18:09:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:22,484 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-07-09 18:09:22,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 18:09:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-07-09 18:09:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 18:09:22,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:22,485 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:22,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:09:22,485 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:22,486 INFO L82 PathProgramCache]: Analyzing trace with hash 426152002, now seen corresponding path program 1 times [2021-07-09 18:09:22,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:22,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453588077] [2021-07-09 18:09:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:22,554 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 18:09:22,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:22,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453588077] [2021-07-09 18:09:22,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453588077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:22,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946286629] [2021-07-09 18:09:22,555 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 18:09:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:22,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:09:22,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:22,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:22,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:22,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:22,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:22,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:22,751 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 18:09:22,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946286629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:22,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:22,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 18:09:22,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691939290] [2021-07-09 18:09:22,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:09:22,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:22,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:09:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:09:22,754 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 18:09:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:22,791 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-07-09 18:09:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:09:22,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 18:09:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:22,793 INFO L225 Difference]: With dead ends: 25 [2021-07-09 18:09:22,793 INFO L226 Difference]: Without dead ends: 21 [2021-07-09 18:09:22,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:09:22,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-07-09 18:09:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-07-09 18:09:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 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 18:09:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-07-09 18:09:22,804 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-07-09 18:09:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:22,804 INFO L482 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-07-09 18:09:22,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 18:09:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-07-09 18:09:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 18:09:22,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:22,805 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:23,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 18:09:23,021 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:23,022 INFO L82 PathProgramCache]: Analyzing trace with hash 348880875, now seen corresponding path program 2 times [2021-07-09 18:09:23,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:23,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929528341] [2021-07-09 18:09:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:23,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:23,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929528341] [2021-07-09 18:09:23,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929528341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:23,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344791101] [2021-07-09 18:09:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:23,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:23,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:23,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:09:23,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:23,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344791101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:23,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:23,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-07-09 18:09:23,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697523850] [2021-07-09 18:09:23,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:09:23,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:23,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:09:23,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:09:23,180 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 18:09:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:23,194 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-07-09 18:09:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:09:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 18:09:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:23,199 INFO L225 Difference]: With dead ends: 50 [2021-07-09 18:09:23,199 INFO L226 Difference]: Without dead ends: 45 [2021-07-09 18:09:23,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:09:23,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-09 18:09:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-07-09 18:09:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-07-09 18:09:23,209 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-07-09 18:09:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:23,209 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-07-09 18:09:23,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 18:09:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-07-09 18:09:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 18:09:23,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:23,211 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:23,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:23,434 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:23,434 INFO L82 PathProgramCache]: Analyzing trace with hash 200515830, now seen corresponding path program 3 times [2021-07-09 18:09:23,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:23,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612045422] [2021-07-09 18:09:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:23,498 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 18:09:23,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:23,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612045422] [2021-07-09 18:09:23,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612045422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:23,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565717077] [2021-07-09 18:09:23,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:23,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:09:23,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:23,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:09:23,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:23,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:23,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:23,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:23,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:23,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:23,619 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 18:09:23,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565717077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:23,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:23,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 18:09:23,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069935921] [2021-07-09 18:09:23,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:09:23,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:23,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:09:23,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:09:23,621 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 18:09:23,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:23,695 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-07-09 18:09:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:09:23,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 18:09:23,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:23,696 INFO L225 Difference]: With dead ends: 65 [2021-07-09 18:09:23,696 INFO L226 Difference]: Without dead ends: 39 [2021-07-09 18:09:23,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:09:23,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-09 18:09:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-07-09 18:09:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 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 18:09:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-07-09 18:09:23,707 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-07-09 18:09:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:23,710 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-07-09 18:09:23,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 18:09:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-07-09 18:09:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 18:09:23,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:23,711 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:23,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:23,915 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:23,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1944094135, now seen corresponding path program 4 times [2021-07-09 18:09:23,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:23,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872271712] [2021-07-09 18:09:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:23,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:23,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872271712] [2021-07-09 18:09:23,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872271712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:23,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988969522] [2021-07-09 18:09:23,948 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 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 18:09:23,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:23,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:23,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:09:23,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:24,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988969522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:24,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:24,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 18:09:24,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468957107] [2021-07-09 18:09:24,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:09:24,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:24,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:09:24,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:09:24,015 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 18:09:24,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:24,025 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-07-09 18:09:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:09:24,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 18:09:24,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:24,026 INFO L225 Difference]: With dead ends: 73 [2021-07-09 18:09:24,026 INFO L226 Difference]: Without dead ends: 66 [2021-07-09 18:09:24,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:09:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-09 18:09:24,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-07-09 18:09:24,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 18:09:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-07-09 18:09:24,031 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-07-09 18:09:24,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:24,031 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-07-09 18:09:24,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 18:09:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-07-09 18:09:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:09:24,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:24,032 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:24,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:24,249 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:24,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1099206658, now seen corresponding path program 5 times [2021-07-09 18:09:24,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:24,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540159901] [2021-07-09 18:09:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:24,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:24,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540159901] [2021-07-09 18:09:24,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540159901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:24,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468583384] [2021-07-09 18:09:24,327 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 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 18:09:24,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:09:24,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:24,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:09:24,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:24,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:24,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:24,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:24,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:24,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:24,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-09 18:09:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:24,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468583384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:24,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:24,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:09:24,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551641894] [2021-07-09 18:09:24,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:09:24,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:24,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:09:24,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:09:24,651 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 18:09:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:25,058 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-07-09 18:09:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:09:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 15 [2021-07-09 18:09:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:25,061 INFO L225 Difference]: With dead ends: 229 [2021-07-09 18:09:25,061 INFO L226 Difference]: Without dead ends: 116 [2021-07-09 18:09:25,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:09:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-09 18:09:25,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-07-09 18:09:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 18:09:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-07-09 18:09:25,068 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-07-09 18:09:25,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:25,069 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-07-09 18:09:25,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 18:09:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-07-09 18:09:25,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:09:25,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:25,070 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:25,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-09 18:09:25,287 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:25,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:25,287 INFO L82 PathProgramCache]: Analyzing trace with hash -449307722, now seen corresponding path program 6 times [2021-07-09 18:09:25,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:25,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157176486] [2021-07-09 18:09:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:25,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:25,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157176486] [2021-07-09 18:09:25,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157176486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:25,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191911566] [2021-07-09 18:09:25,427 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 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 18:09:25,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:09:25,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:25,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:09:25,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:25,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:25,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:25,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:25,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:25,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:25,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191911566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:25,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:25,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 18:09:25,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132215799] [2021-07-09 18:09:25,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:09:25,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:25,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:09:25,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:09:25,534 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 18:09:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:25,720 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-07-09 18:09:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:09:25,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:09:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:25,722 INFO L225 Difference]: With dead ends: 121 [2021-07-09 18:09:25,722 INFO L226 Difference]: Without dead ends: 77 [2021-07-09 18:09:25,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:09:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-09 18:09:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-07-09 18:09:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-07-09 18:09:25,738 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-07-09 18:09:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:25,738 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-07-09 18:09:25,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 18:09:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-07-09 18:09:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:09:25,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:25,741 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:25,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:25,942 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:25,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1020566793, now seen corresponding path program 7 times [2021-07-09 18:09:25,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:25,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897584164] [2021-07-09 18:09:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:26,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897584164] [2021-07-09 18:09:26,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897584164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668622392] [2021-07-09 18:09:26,001 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 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 18:09:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:26,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:09:26,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:26,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668622392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:26,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:26,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 18:09:26,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950890207] [2021-07-09 18:09:26,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:09:26,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:26,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:09:26,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:09:26,115 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:26,132 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-07-09 18:09:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:09:26,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:09:26,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:26,133 INFO L225 Difference]: With dead ends: 128 [2021-07-09 18:09:26,133 INFO L226 Difference]: Without dead ends: 117 [2021-07-09 18:09:26,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:09:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-09 18:09:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-07-09 18:09:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 18:09:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-07-09 18:09:26,147 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-07-09 18:09:26,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:26,148 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-07-09 18:09:26,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-07-09 18:09:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:09:26,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:26,149 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:26,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:26,365 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1344581694, now seen corresponding path program 8 times [2021-07-09 18:09:26,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:26,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681197399] [2021-07-09 18:09:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:26,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:26,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681197399] [2021-07-09 18:09:26,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681197399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:26,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418196947] [2021-07-09 18:09:26,501 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 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 18:09:26,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:26,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:26,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:09:26,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:26,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:26,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:26,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:26,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:26,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:26,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418196947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:26,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:26,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 18:09:26,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547681909] [2021-07-09 18:09:26,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:09:26,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:26,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:09:26,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:09:26,598 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 18:09:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:26,844 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-07-09 18:09:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:09:26,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 18:09:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:26,846 INFO L225 Difference]: With dead ends: 179 [2021-07-09 18:09:26,846 INFO L226 Difference]: Without dead ends: 105 [2021-07-09 18:09:26,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:09:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-09 18:09:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-07-09 18:09:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-07-09 18:09:26,854 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-07-09 18:09:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:26,854 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-07-09 18:09:26,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 18:09:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-07-09 18:09:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:09:26,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:26,856 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:27,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:09:27,080 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:27,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1290711147, now seen corresponding path program 9 times [2021-07-09 18:09:27,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:27,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418006350] [2021-07-09 18:09:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:27,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:27,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418006350] [2021-07-09 18:09:27,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418006350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:27,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183154532] [2021-07-09 18:09:27,149 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 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 18:09:27,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:09:27,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:27,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:09:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:27,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183154532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:27,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:27,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 18:09:27,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112072342] [2021-07-09 18:09:27,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:09:27,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:27,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:09:27,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:09:27,239 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:27,258 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-07-09 18:09:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:09:27,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:09:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:27,259 INFO L225 Difference]: With dead ends: 160 [2021-07-09 18:09:27,260 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 18:09:27,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:09:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 18:09:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-07-09 18:09:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 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 18:09:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-07-09 18:09:27,263 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-07-09 18:09:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:27,263 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-07-09 18:09:27,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-07-09 18:09:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:09:27,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:27,264 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:27,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:27,478 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash -849963402, now seen corresponding path program 10 times [2021-07-09 18:09:27,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:27,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18054314] [2021-07-09 18:09:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:27,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:27,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18054314] [2021-07-09 18:09:27,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18054314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:27,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39379912] [2021-07-09 18:09:27,645 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 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 18:09:27,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:27,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:27,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:09:27,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:27,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:27,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:27,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:27,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:27,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:27,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39379912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:27,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:27,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 18:09:27,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043022442] [2021-07-09 18:09:27,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:09:27,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:27,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:09:27,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:09:27,763 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:28,088 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-07-09 18:09:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:09:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:09:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:28,090 INFO L225 Difference]: With dead ends: 229 [2021-07-09 18:09:28,091 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 18:09:28,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:09:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 18:09:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-07-09 18:09:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 18:09:28,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-07-09 18:09:28,093 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-07-09 18:09:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:28,094 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-07-09 18:09:28,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-07-09 18:09:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:09:28,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:28,095 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:28,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:28,317 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash -555990985, now seen corresponding path program 11 times [2021-07-09 18:09:28,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:28,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980955242] [2021-07-09 18:09:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:28,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:28,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980955242] [2021-07-09 18:09:28,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980955242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:28,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453590847] [2021-07-09 18:09:28,391 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 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 18:09:28,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:09:28,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:28,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:09:28,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:28,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453590847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:28,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:28,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 18:09:28,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422840708] [2021-07-09 18:09:28,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:09:28,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:28,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:09:28,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:09:28,498 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 18:09:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:28,518 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-07-09 18:09:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:09:28,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 22 [2021-07-09 18:09:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:28,520 INFO L225 Difference]: With dead ends: 195 [2021-07-09 18:09:28,520 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 18:09:28,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:09:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 18:09:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-07-09 18:09:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 18:09:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-07-09 18:09:28,524 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-07-09 18:09:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:28,524 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-07-09 18:09:28,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 18:09:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-07-09 18:09:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:09:28,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:28,525 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:28,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 18:09:28,745 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash -454897790, now seen corresponding path program 12 times [2021-07-09 18:09:28,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:28,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153315421] [2021-07-09 18:09:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:28,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:28,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153315421] [2021-07-09 18:09:28,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153315421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:28,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846680989] [2021-07-09 18:09:28,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:09:29,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:09:29,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:29,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:09:29,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:29,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:29,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:29,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:29,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:29,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:29,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-09 18:09:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:29,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846680989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:29,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:29,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:09:29,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910252088] [2021-07-09 18:09:29,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:09:29,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:29,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:09:29,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:09:29,541 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:31,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:31,329 INFO L93 Difference]: Finished difference Result 869 states and 1674 transitions. [2021-07-09 18:09:31,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:09:31,330 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:09:31,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:31,332 INFO L225 Difference]: With dead ends: 869 [2021-07-09 18:09:31,332 INFO L226 Difference]: Without dead ends: 472 [2021-07-09 18:09:31,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1889.4ms TimeCoverageRelationStatistics Valid=1224, Invalid=5256, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:09:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-09 18:09:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 150. [2021-07-09 18:09:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1006711409395975) internal successors, (313), 149 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 18:09:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 313 transitions. [2021-07-09 18:09:31,343 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 313 transitions. Word has length 23 [2021-07-09 18:09:31,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:31,343 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 313 transitions. [2021-07-09 18:09:31,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:31,343 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 313 transitions. [2021-07-09 18:09:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:09:31,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:31,346 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:31,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:09:31,557 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:31,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1467420982, now seen corresponding path program 13 times [2021-07-09 18:09:31,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:31,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39800278] [2021-07-09 18:09:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:31,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:31,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39800278] [2021-07-09 18:09:31,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39800278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:31,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338446957] [2021-07-09 18:09:31,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:09:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:31,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:09:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:31,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:31,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:31,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:31,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:31,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:31,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338446957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:31,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:31,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-07-09 18:09:31,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253451251] [2021-07-09 18:09:31,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:09:31,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:31,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:09:31,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:09:31,897 INFO L87 Difference]: Start difference. First operand 150 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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 18:09:32,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:32,359 INFO L93 Difference]: Finished difference Result 325 states and 626 transitions. [2021-07-09 18:09:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:09:32,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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 18:09:32,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:32,361 INFO L225 Difference]: With dead ends: 325 [2021-07-09 18:09:32,361 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 18:09:32,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 492.7ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:09:32,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 18:09:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 56. [2021-07-09 18:09:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 18:09:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-07-09 18:09:32,364 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-07-09 18:09:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:32,364 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-07-09 18:09:32,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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 18:09:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-07-09 18:09:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:09:32,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:32,365 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:32,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:09:32,581 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1731519113, now seen corresponding path program 14 times [2021-07-09 18:09:32,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:32,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323517123] [2021-07-09 18:09:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:32,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:32,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323517123] [2021-07-09 18:09:32,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323517123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410979019] [2021-07-09 18:09:32,667 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 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 18:09:32,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:32,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:32,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:09:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:32,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410979019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:32,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:32,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 18:09:32,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695725081] [2021-07-09 18:09:32,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:09:32,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:09:32,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:09:32,811 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:32,841 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-07-09 18:09:32,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:09:32,841 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:09:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:32,843 INFO L225 Difference]: With dead ends: 274 [2021-07-09 18:09:32,843 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 18:09:32,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:09:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 18:09:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-07-09 18:09:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 0 states have call successors, (0), 0 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 18:09:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-07-09 18:09:32,848 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-07-09 18:09:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:32,848 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-07-09 18:09:32,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:32,848 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-07-09 18:09:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:09:32,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:32,849 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:33,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:33,073 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:33,073 INFO L82 PathProgramCache]: Analyzing trace with hash 252907330, now seen corresponding path program 15 times [2021-07-09 18:09:33,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:33,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810230146] [2021-07-09 18:09:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:33,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:33,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810230146] [2021-07-09 18:09:33,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810230146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:33,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569018886] [2021-07-09 18:09:33,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:33,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:09:33,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:33,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:09:33,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:33,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:33,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:33,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:33,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:33,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:33,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569018886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:33,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:33,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-07-09 18:09:33,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501175195] [2021-07-09 18:09:33,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:09:33,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:33,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:09:33,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:09:33,530 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:34,131 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-07-09 18:09:34,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:09:34,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:09:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:34,134 INFO L225 Difference]: With dead ends: 415 [2021-07-09 18:09:34,134 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 18:09:34,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:09:34,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 18:09:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-07-09 18:09:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 18:09:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-07-09 18:09:34,139 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-07-09 18:09:34,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:34,139 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-07-09 18:09:34,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-07-09 18:09:34,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:09:34,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:34,140 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:34,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:09:34,353 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:34,353 INFO L82 PathProgramCache]: Analyzing trace with hash -726736661, now seen corresponding path program 16 times [2021-07-09 18:09:34,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:34,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874515234] [2021-07-09 18:09:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:34,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:34,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874515234] [2021-07-09 18:09:34,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874515234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:34,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840496330] [2021-07-09 18:09:34,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:34,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:34,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:34,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:09:34,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:34,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840496330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:34,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:34,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 18:09:34,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650105222] [2021-07-09 18:09:34,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:09:34,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:34,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:09:34,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:09:34,546 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 18:09:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:34,576 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-07-09 18:09:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:09:34,577 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 18:09:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:34,578 INFO L225 Difference]: With dead ends: 318 [2021-07-09 18:09:34,578 INFO L226 Difference]: Without dead ends: 297 [2021-07-09 18:09:34,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:09:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-09 18:09:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-07-09 18:09:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 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 18:09:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-07-09 18:09:34,583 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-07-09 18:09:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:34,584 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-07-09 18:09:34,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 18:09:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-07-09 18:09:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:09:34,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:34,584 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:34,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:09:34,807 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:34,807 INFO L82 PathProgramCache]: Analyzing trace with hash -658404362, now seen corresponding path program 17 times [2021-07-09 18:09:34,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:34,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361918518] [2021-07-09 18:09:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:35,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:35,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361918518] [2021-07-09 18:09:35,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361918518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:35,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314756009] [2021-07-09 18:09:35,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:35,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:09:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:35,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:09:35,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:35,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:35,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:35,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:35,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:35,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:35,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-09 18:09:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:35,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314756009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:35,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:35,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:35,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534921062] [2021-07-09 18:09:35,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:35,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:35,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:35,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:35,968 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:40,031 INFO L93 Difference]: Finished difference Result 1727 states and 3354 transitions. [2021-07-09 18:09:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-09 18:09:40,031 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:09:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:40,036 INFO L225 Difference]: With dead ends: 1727 [2021-07-09 18:09:40,036 INFO L226 Difference]: Without dead ends: 1012 [2021-07-09 18:09:40,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4325 ImplicationChecksByTransitivity, 4224.1ms TimeCoverageRelationStatistics Valid=2986, Invalid=13526, Unknown=0, NotChecked=0, Total=16512 [2021-07-09 18:09:40,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-07-09 18:09:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 252. [2021-07-09 18:09:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.095617529880478) internal successors, (526), 251 states have internal predecessors, (526), 0 states have call successors, (0), 0 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 18:09:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 526 transitions. [2021-07-09 18:09:40,050 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 526 transitions. Word has length 29 [2021-07-09 18:09:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:40,050 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 526 transitions. [2021-07-09 18:09:40,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 526 transitions. [2021-07-09 18:09:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:09:40,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:40,051 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:40,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:40,269 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:40,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1964765438, now seen corresponding path program 18 times [2021-07-09 18:09:40,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:40,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026437877] [2021-07-09 18:09:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:40,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:40,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026437877] [2021-07-09 18:09:40,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026437877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:40,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076603279] [2021-07-09 18:09:40,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:40,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:09:40,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:09:40,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:40,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:40,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:40,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:40,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:40,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:40,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076603279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:40,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:40,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-07-09 18:09:40,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926768417] [2021-07-09 18:09:40,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:09:40,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:40,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:09:40,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:09:40,712 INFO L87 Difference]: Start difference. First operand 252 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 18:09:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:41,448 INFO L93 Difference]: Finished difference Result 541 states and 1052 transitions. [2021-07-09 18:09:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:09:41,448 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 31 [2021-07-09 18:09:41,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:41,450 INFO L225 Difference]: With dead ends: 541 [2021-07-09 18:09:41,450 INFO L226 Difference]: Without dead ends: 343 [2021-07-09 18:09:41,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 787.0ms TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:09:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-07-09 18:09:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 71. [2021-07-09 18:09:41,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 70 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 18:09:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 136 transitions. [2021-07-09 18:09:41,454 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 136 transitions. Word has length 31 [2021-07-09 18:09:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:41,454 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 136 transitions. [2021-07-09 18:09:41,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 18:09:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 136 transitions. [2021-07-09 18:09:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:09:41,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:41,455 INFO L508 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:41,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:41,669 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:41,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:41,669 INFO L82 PathProgramCache]: Analyzing trace with hash -755115733, now seen corresponding path program 19 times [2021-07-09 18:09:41,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:41,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951890550] [2021-07-09 18:09:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:41,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:41,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951890550] [2021-07-09 18:09:41,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951890550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:41,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191879809] [2021-07-09 18:09:41,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:41,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:09:41,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:41,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191879809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:41,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:41,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 18:09:41,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846714045] [2021-07-09 18:09:41,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:09:41,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:41,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:09:41,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:09:41,943 INFO L87 Difference]: Start difference. First operand 71 states and 136 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 18:09:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:41,976 INFO L93 Difference]: Finished difference Result 415 states and 782 transitions. [2021-07-09 18:09:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:09:41,977 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 32 [2021-07-09 18:09:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:41,978 INFO L225 Difference]: With dead ends: 415 [2021-07-09 18:09:41,978 INFO L226 Difference]: Without dead ends: 390 [2021-07-09 18:09:41,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:09:41,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-09 18:09:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 318. [2021-07-09 18:09:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.088328075709779) internal successors, (662), 317 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 18:09:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 662 transitions. [2021-07-09 18:09:41,985 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 662 transitions. Word has length 32 [2021-07-09 18:09:41,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:41,985 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 662 transitions. [2021-07-09 18:09:41,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 18:09:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 662 transitions. [2021-07-09 18:09:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:41,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:41,986 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:42,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:42,200 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:42,200 INFO L82 PathProgramCache]: Analyzing trace with hash -396491082, now seen corresponding path program 20 times [2021-07-09 18:09:42,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:42,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294781118] [2021-07-09 18:09:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:42,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:42,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294781118] [2021-07-09 18:09:42,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294781118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:42,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365079321] [2021-07-09 18:09:42,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:42,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:42,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:42,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:09:42,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:42,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:42,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:42,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:42,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:42,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:42,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365079321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:42,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:42,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-07-09 18:09:42,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750371324] [2021-07-09 18:09:42,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:09:42,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:42,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:09:42,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:09:42,708 INFO L87 Difference]: Start difference. First operand 318 states and 662 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 18:09:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:43,564 INFO L93 Difference]: Finished difference Result 655 states and 1275 transitions. [2021-07-09 18:09:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:09:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 33 [2021-07-09 18:09:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:43,567 INFO L225 Difference]: With dead ends: 655 [2021-07-09 18:09:43,567 INFO L226 Difference]: Without dead ends: 399 [2021-07-09 18:09:43,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 934.5ms TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:09:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-09 18:09:43,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 76. [2021-07-09 18:09:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 75 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 18:09:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 146 transitions. [2021-07-09 18:09:43,571 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 146 transitions. Word has length 33 [2021-07-09 18:09:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:43,571 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 146 transitions. [2021-07-09 18:09:43,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 18:09:43,571 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 146 transitions. [2021-07-09 18:09:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:09:43,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:43,572 INFO L508 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:43,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:09:43,785 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:43,785 INFO L82 PathProgramCache]: Analyzing trace with hash 616749047, now seen corresponding path program 21 times [2021-07-09 18:09:43,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:43,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277256150] [2021-07-09 18:09:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:43,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:43,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277256150] [2021-07-09 18:09:43,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277256150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:43,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899226111] [2021-07-09 18:09:43,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:43,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:09:43,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:43,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:09:43,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:44,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899226111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:44,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:44,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 18:09:44,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368535569] [2021-07-09 18:09:44,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:09:44,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:44,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:09:44,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:09:44,063 INFO L87 Difference]: Start difference. First operand 76 states and 146 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 18:09:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:44,103 INFO L93 Difference]: Finished difference Result 468 states and 885 transitions. [2021-07-09 18:09:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:09:44,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 34 [2021-07-09 18:09:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:44,105 INFO L225 Difference]: With dead ends: 468 [2021-07-09 18:09:44,105 INFO L226 Difference]: Without dead ends: 441 [2021-07-09 18:09:44,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:09:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-09 18:09:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 363. [2021-07-09 18:09:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.085635359116022) internal successors, (755), 362 states have internal predecessors, (755), 0 states have call successors, (0), 0 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 18:09:44,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 755 transitions. [2021-07-09 18:09:44,113 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 755 transitions. Word has length 34 [2021-07-09 18:09:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:44,113 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 755 transitions. [2021-07-09 18:09:44,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 18:09:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 755 transitions. [2021-07-09 18:09:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:09:44,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:44,114 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:44,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:09:44,337 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:44,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1657654978, now seen corresponding path program 22 times [2021-07-09 18:09:44,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:44,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601002247] [2021-07-09 18:09:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:44,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:44,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601002247] [2021-07-09 18:09:44,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601002247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:44,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368471436] [2021-07-09 18:09:44,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:44,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:44,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:44,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 18:09:44,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:44,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:44,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:44,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:44,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:44,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:44,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368471436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:44,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:44,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-07-09 18:09:44,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900715958] [2021-07-09 18:09:44,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:09:44,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:09:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:09:44,885 INFO L87 Difference]: Start difference. First operand 363 states and 755 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 18:09:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:45,882 INFO L93 Difference]: Finished difference Result 747 states and 1457 transitions. [2021-07-09 18:09:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:09:45,889 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 35 [2021-07-09 18:09:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:45,890 INFO L225 Difference]: With dead ends: 747 [2021-07-09 18:09:45,890 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 18:09:45,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1075.6ms TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:09:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 18:09:45,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 81. [2021-07-09 18:09:45,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.95) internal successors, (156), 80 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 18:09:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 156 transitions. [2021-07-09 18:09:45,895 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 156 transitions. Word has length 35 [2021-07-09 18:09:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:45,895 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 156 transitions. [2021-07-09 18:09:45,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 18:09:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2021-07-09 18:09:45,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:09:45,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:45,896 INFO L508 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:46,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:46,109 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:46,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:46,109 INFO L82 PathProgramCache]: Analyzing trace with hash -129232533, now seen corresponding path program 23 times [2021-07-09 18:09:46,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:46,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734306871] [2021-07-09 18:09:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:46,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:46,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734306871] [2021-07-09 18:09:46,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734306871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:46,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901600173] [2021-07-09 18:09:46,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:46,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:09:46,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:46,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:09:46,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:46,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901600173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:46,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:46,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-09 18:09:46,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855298513] [2021-07-09 18:09:46,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:09:46,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:46,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:09:46,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:09:46,387 INFO L87 Difference]: Start difference. First operand 81 states and 156 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:46,431 INFO L93 Difference]: Finished difference Result 524 states and 994 transitions. [2021-07-09 18:09:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:09:46,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:09:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:46,434 INFO L225 Difference]: With dead ends: 524 [2021-07-09 18:09:46,434 INFO L226 Difference]: Without dead ends: 495 [2021-07-09 18:09:46,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:09:46,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-09 18:09:46,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 411. [2021-07-09 18:09:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0829268292682928) internal successors, (854), 410 states have internal predecessors, (854), 0 states have call successors, (0), 0 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 18:09:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 854 transitions. [2021-07-09 18:09:46,448 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 854 transitions. Word has length 36 [2021-07-09 18:09:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:46,448 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 854 transitions. [2021-07-09 18:09:46,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:46,449 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 854 transitions. [2021-07-09 18:09:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:09:46,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:46,450 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:46,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:09:46,667 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:46,667 INFO L82 PathProgramCache]: Analyzing trace with hash -546012810, now seen corresponding path program 24 times [2021-07-09 18:09:46,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:46,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729864308] [2021-07-09 18:09:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:47,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:47,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729864308] [2021-07-09 18:09:47,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729864308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:47,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285898327] [2021-07-09 18:09:47,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:47,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:09:47,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-09 18:09:47,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:47,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:47,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:47,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:47,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:47,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:47,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285898327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:47,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:47,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-07-09 18:09:47,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965522693] [2021-07-09 18:09:47,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:09:47,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:47,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:09:47,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:09:47,286 INFO L87 Difference]: Start difference. First operand 411 states and 854 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 18:09:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:48,495 INFO L93 Difference]: Finished difference Result 845 states and 1651 transitions. [2021-07-09 18:09:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:09:48,496 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 37 [2021-07-09 18:09:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:48,498 INFO L225 Difference]: With dead ends: 845 [2021-07-09 18:09:48,498 INFO L226 Difference]: Without dead ends: 519 [2021-07-09 18:09:48,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1283.0ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:09:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-09 18:09:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 86. [2021-07-09 18:09:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 85 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 18:09:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 166 transitions. [2021-07-09 18:09:48,503 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 166 transitions. Word has length 37 [2021-07-09 18:09:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:48,503 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 166 transitions. [2021-07-09 18:09:48,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 18:09:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 166 transitions. [2021-07-09 18:09:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 18:09:48,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:48,504 INFO L508 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:48,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:48,721 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:48,721 INFO L82 PathProgramCache]: Analyzing trace with hash 276542775, now seen corresponding path program 25 times [2021-07-09 18:09:48,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:48,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456501705] [2021-07-09 18:09:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:48,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:48,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456501705] [2021-07-09 18:09:48,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456501705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:48,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247076725] [2021-07-09 18:09:48,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:48,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:09:48,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:49,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247076725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:49,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:49,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-07-09 18:09:49,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285988100] [2021-07-09 18:09:49,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:09:49,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:49,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:09:49,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:09:49,016 INFO L87 Difference]: Start difference. First operand 86 states and 166 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:49,061 INFO L93 Difference]: Finished difference Result 583 states and 1109 transitions. [2021-07-09 18:09:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:09:49,062 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 18:09:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:49,064 INFO L225 Difference]: With dead ends: 583 [2021-07-09 18:09:49,064 INFO L226 Difference]: Without dead ends: 552 [2021-07-09 18:09:49,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:09:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-07-09 18:09:49,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2021-07-09 18:09:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0802603036876355) internal successors, (959), 461 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 18:09:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 959 transitions. [2021-07-09 18:09:49,072 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 959 transitions. Word has length 38 [2021-07-09 18:09:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:49,072 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 959 transitions. [2021-07-09 18:09:49,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 959 transitions. [2021-07-09 18:09:49,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:09:49,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:49,074 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:49,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:09:49,297 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:49,297 INFO L82 PathProgramCache]: Analyzing trace with hash -817344894, now seen corresponding path program 26 times [2021-07-09 18:09:49,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:49,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690930546] [2021-07-09 18:09:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:49,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:49,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690930546] [2021-07-09 18:09:49,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690930546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:49,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217720833] [2021-07-09 18:09:49,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:49,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:49,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:49,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2021-07-09 18:09:49,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:49,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:49,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:49,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:49,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:49,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:49,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217720833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:49,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:49,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-07-09 18:09:49,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392346335] [2021-07-09 18:09:49,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:09:49,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:49,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:09:49,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:09:49,996 INFO L87 Difference]: Start difference. First operand 462 states and 959 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:51,343 INFO L93 Difference]: Finished difference Result 949 states and 1857 transitions. [2021-07-09 18:09:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:09:51,343 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:09:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:51,345 INFO L225 Difference]: With dead ends: 949 [2021-07-09 18:09:51,345 INFO L226 Difference]: Without dead ends: 585 [2021-07-09 18:09:51,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1481.9ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:09:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-09 18:09:51,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 91. [2021-07-09 18:09:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 18:09:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 176 transitions. [2021-07-09 18:09:51,351 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 176 transitions. Word has length 39 [2021-07-09 18:09:51,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:51,351 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 176 transitions. [2021-07-09 18:09:51,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:51,351 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 176 transitions. [2021-07-09 18:09:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:09:51,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:51,352 INFO L508 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:51,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:09:51,573 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:51,573 INFO L82 PathProgramCache]: Analyzing trace with hash 455182763, now seen corresponding path program 27 times [2021-07-09 18:09:51,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:51,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40752192] [2021-07-09 18:09:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:51,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:51,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40752192] [2021-07-09 18:09:51,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40752192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:51,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532009628] [2021-07-09 18:09:51,757 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 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 18:09:51,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 18:09:51,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:51,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:09:51,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:51,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532009628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:51,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:51,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-07-09 18:09:51,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314538958] [2021-07-09 18:09:51,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:09:51,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:51,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:09:51,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:09:51,885 INFO L87 Difference]: Start difference. First operand 91 states and 176 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 18:09:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:51,930 INFO L93 Difference]: Finished difference Result 645 states and 1230 transitions. [2021-07-09 18:09:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:09:51,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 40 [2021-07-09 18:09:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:51,932 INFO L225 Difference]: With dead ends: 645 [2021-07-09 18:09:51,932 INFO L226 Difference]: Without dead ends: 612 [2021-07-09 18:09:51,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:09:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-09 18:09:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2021-07-09 18:09:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0776699029126213) internal successors, (1070), 515 states have internal predecessors, (1070), 0 states have call successors, (0), 0 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 18:09:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1070 transitions. [2021-07-09 18:09:51,942 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1070 transitions. Word has length 40 [2021-07-09 18:09:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:51,942 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1070 transitions. [2021-07-09 18:09:51,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 18:09:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1070 transitions. [2021-07-09 18:09:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:09:51,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:51,943 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:52,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:09:52,166 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:52,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1496120374, now seen corresponding path program 28 times [2021-07-09 18:09:52,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:52,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753359915] [2021-07-09 18:09:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:52,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:52,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753359915] [2021-07-09 18:09:52,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753359915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:52,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869671180] [2021-07-09 18:09:52,751 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 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 18:09:52,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:52,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-09 18:09:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:52,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:52,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:52,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:52,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:52,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:09:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:52,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869671180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:52,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:52,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-07-09 18:09:52,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798304693] [2021-07-09 18:09:52,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:09:52,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:52,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:09:52,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:09:52,881 INFO L87 Difference]: Start difference. First operand 516 states and 1070 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:54,458 INFO L93 Difference]: Finished difference Result 1059 states and 2075 transitions. [2021-07-09 18:09:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:09:54,459 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:09:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:54,460 INFO L225 Difference]: With dead ends: 1059 [2021-07-09 18:09:54,460 INFO L226 Difference]: Without dead ends: 655 [2021-07-09 18:09:54,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1668.1ms TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:09:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-07-09 18:09:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 96. [2021-07-09 18:09:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 95 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 18:09:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 186 transitions. [2021-07-09 18:09:54,466 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 186 transitions. Word has length 41 [2021-07-09 18:09:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:54,466 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 186 transitions. [2021-07-09 18:09:54,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 186 transitions. [2021-07-09 18:09:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 18:09:54,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:54,467 INFO L508 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:54,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:54,681 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:54,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:54,681 INFO L82 PathProgramCache]: Analyzing trace with hash -841837961, now seen corresponding path program 29 times [2021-07-09 18:09:54,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:54,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643561174] [2021-07-09 18:09:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:54,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:54,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643561174] [2021-07-09 18:09:54,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643561174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:54,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765704667] [2021-07-09 18:09:54,866 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 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 18:09:54,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 18:09:54,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:55,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765704667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:55,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:55,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-07-09 18:09:55,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954669776] [2021-07-09 18:09:55,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:09:55,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:55,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:09:55,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:09:55,026 INFO L87 Difference]: Start difference. First operand 96 states and 186 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:55,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:55,082 INFO L93 Difference]: Finished difference Result 710 states and 1357 transitions. [2021-07-09 18:09:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:09:55,082 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 18:09:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:55,085 INFO L225 Difference]: With dead ends: 710 [2021-07-09 18:09:55,085 INFO L226 Difference]: Without dead ends: 675 [2021-07-09 18:09:55,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:09:55,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-07-09 18:09:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 573. [2021-07-09 18:09:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.075174825174825) internal successors, (1187), 572 states have internal predecessors, (1187), 0 states have call successors, (0), 0 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 18:09:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1187 transitions. [2021-07-09 18:09:55,095 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1187 transitions. Word has length 42 [2021-07-09 18:09:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:55,096 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1187 transitions. [2021-07-09 18:09:55,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:55,096 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1187 transitions. [2021-07-09 18:09:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:55,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:55,097 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:55,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 18:09:55,317 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:55,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1228173758, now seen corresponding path program 30 times [2021-07-09 18:09:55,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:55,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750709584] [2021-07-09 18:09:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:56,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:56,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750709584] [2021-07-09 18:09:56,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750709584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:56,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305125898] [2021-07-09 18:09:56,040 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:56,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 18:09:56,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:56,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:09:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:57,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:57,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:09:57,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:57,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:57,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:57,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-09 18:09:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 136 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:57,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305125898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:57,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:57,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-07-09 18:09:57,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765331465] [2021-07-09 18:09:57,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-09 18:09:57,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:57,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-09 18:09:58,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=4270, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:09:58,000 INFO L87 Difference]: Start difference. First operand 573 states and 1187 transitions. Second operand has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 18:10:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:13,897 INFO L93 Difference]: Finished difference Result 5479 states and 10739 transitions. [2021-07-09 18:10:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-07-09 18:10:13,897 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:10:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:13,907 INFO L225 Difference]: With dead ends: 5479 [2021-07-09 18:10:13,907 INFO L226 Difference]: Without dead ends: 3672 [2021-07-09 18:10:13,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23730 ImplicationChecksByTransitivity, 16578.6ms TimeCoverageRelationStatistics Valid=13164, Invalid=62736, Unknown=0, NotChecked=0, Total=75900 [2021-07-09 18:10:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-07-09 18:10:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 595. [2021-07-09 18:10:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.0757575757575757) internal successors, (1233), 594 states have internal predecessors, (1233), 0 states have call successors, (0), 0 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 18:10:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1233 transitions. [2021-07-09 18:10:13,936 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1233 transitions. Word has length 43 [2021-07-09 18:10:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:13,937 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1233 transitions. [2021-07-09 18:10:13,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 18:10:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1233 transitions. [2021-07-09 18:10:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:10:13,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:13,938 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:14,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:14,157 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1297123594, now seen corresponding path program 31 times [2021-07-09 18:10:14,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:14,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488445865] [2021-07-09 18:10:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:14,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:14,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488445865] [2021-07-09 18:10:14,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488445865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:14,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18200393] [2021-07-09 18:10:14,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:10:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:14,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-09 18:10:14,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:15,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:10:15,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:15,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:15,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:15,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:10:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:15,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18200393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:15,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:15,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-07-09 18:10:15,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583033566] [2021-07-09 18:10:15,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:10:15,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:15,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:10:15,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:10:15,047 INFO L87 Difference]: Start difference. First operand 595 states and 1233 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:17,007 INFO L93 Difference]: Finished difference Result 1255 states and 2466 transitions. [2021-07-09 18:10:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:10:17,007 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 18:10:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:17,010 INFO L225 Difference]: With dead ends: 1255 [2021-07-09 18:10:17,010 INFO L226 Difference]: Without dead ends: 805 [2021-07-09 18:10:17,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2129.6ms TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:10:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-07-09 18:10:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 106. [2021-07-09 18:10:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 105 states have internal predecessors, (206), 0 states have call successors, (0), 0 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 18:10:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 206 transitions. [2021-07-09 18:10:17,016 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 206 transitions. Word has length 45 [2021-07-09 18:10:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:17,016 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 206 transitions. [2021-07-09 18:10:17,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 206 transitions. [2021-07-09 18:10:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 18:10:17,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:17,017 INFO L508 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:17,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 18:10:17,220 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:17,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:17,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1533055049, now seen corresponding path program 32 times [2021-07-09 18:10:17,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:17,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248516785] [2021-07-09 18:10:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:17,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:17,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248516785] [2021-07-09 18:10:17,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248516785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:17,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663413370] [2021-07-09 18:10:17,475 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 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 18:10:17,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:17,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:17,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 18:10:17,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:17,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663413370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:17,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:17,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2021-07-09 18:10:17,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147055780] [2021-07-09 18:10:17,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:10:17,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:10:17,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:10:17,629 INFO L87 Difference]: Start difference. First operand 106 states and 206 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:17,689 INFO L93 Difference]: Finished difference Result 849 states and 1629 transitions. [2021-07-09 18:10:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:10:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-09 18:10:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:17,693 INFO L225 Difference]: With dead ends: 849 [2021-07-09 18:10:17,693 INFO L226 Difference]: Without dead ends: 810 [2021-07-09 18:10:17,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:10:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-07-09 18:10:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 696. [2021-07-09 18:10:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 2.0705035971223023) internal successors, (1439), 695 states have internal predecessors, (1439), 0 states have call successors, (0), 0 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 18:10:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1439 transitions. [2021-07-09 18:10:17,703 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1439 transitions. Word has length 46 [2021-07-09 18:10:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:17,703 INFO L482 AbstractCegarLoop]: Abstraction has 696 states and 1439 transitions. [2021-07-09 18:10:17,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1439 transitions. [2021-07-09 18:10:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:17,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:17,705 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:17,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:10:17,917 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:17,917 INFO L82 PathProgramCache]: Analyzing trace with hash 768577026, now seen corresponding path program 33 times [2021-07-09 18:10:17,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:17,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226379410] [2021-07-09 18:10:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:18,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:18,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226379410] [2021-07-09 18:10:18,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226379410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:18,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075349372] [2021-07-09 18:10:18,761 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 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 18:10:18,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 18:10:18,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:18,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-07-09 18:10:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:18,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:10:18,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:18,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:18,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:18,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:10:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:18,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075349372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:18,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:18,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-07-09 18:10:18,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020256332] [2021-07-09 18:10:18,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:10:18,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:18,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:10:18,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:10:18,930 INFO L87 Difference]: Start difference. First operand 696 states and 1439 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:21,096 INFO L93 Difference]: Finished difference Result 1425 states and 2801 transitions. [2021-07-09 18:10:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:10:21,097 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:10:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:21,099 INFO L225 Difference]: With dead ends: 1425 [2021-07-09 18:10:21,099 INFO L226 Difference]: Without dead ends: 889 [2021-07-09 18:10:21,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2393.6ms TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:10:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-07-09 18:10:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 111. [2021-07-09 18:10:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.9636363636363636) internal successors, (216), 110 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 18:10:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 216 transitions. [2021-07-09 18:10:21,104 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 216 transitions. Word has length 47 [2021-07-09 18:10:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:21,104 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 216 transitions. [2021-07-09 18:10:21,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 216 transitions. [2021-07-09 18:10:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:10:21,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:21,105 INFO L508 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:21,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:10:21,306 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1920845269, now seen corresponding path program 34 times [2021-07-09 18:10:21,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:21,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671483684] [2021-07-09 18:10:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:21,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:21,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671483684] [2021-07-09 18:10:21,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671483684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:21,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479068881] [2021-07-09 18:10:21,549 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 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 18:10:21,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:10:21,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:21,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:10:21,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:21,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479068881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:21,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:21,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-07-09 18:10:21,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514713164] [2021-07-09 18:10:21,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:10:21,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:10:21,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:10:21,702 INFO L87 Difference]: Start difference. First operand 111 states and 216 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:21,765 INFO L93 Difference]: Finished difference Result 923 states and 1774 transitions. [2021-07-09 18:10:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:10:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-07-09 18:10:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:21,769 INFO L225 Difference]: With dead ends: 923 [2021-07-09 18:10:21,769 INFO L226 Difference]: Without dead ends: 882 [2021-07-09 18:10:21,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:10:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-07-09 18:10:21,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 762. [2021-07-09 18:10:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.0683311432325886) internal successors, (1574), 761 states have internal predecessors, (1574), 0 states have call successors, (0), 0 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 18:10:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1574 transitions. [2021-07-09 18:10:21,781 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1574 transitions. Word has length 48 [2021-07-09 18:10:21,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:21,781 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1574 transitions. [2021-07-09 18:10:21,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:21,782 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1574 transitions. [2021-07-09 18:10:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-09 18:10:21,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:21,783 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:22,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:10:22,003 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:22,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:22,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1960578634, now seen corresponding path program 35 times [2021-07-09 18:10:22,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:22,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780312211] [2021-07-09 18:10:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:22,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:22,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780312211] [2021-07-09 18:10:22,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780312211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:22,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909192658] [2021-07-09 18:10:22,944 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 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 18:10:22,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 18:10:22,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:22,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:22,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:25,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:10:25,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:10:25,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:25,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:25,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:25,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-09 18:10:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:25,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909192658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:25,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:25,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-07-09 18:10:25,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668082337] [2021-07-09 18:10:25,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-07-09 18:10:25,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:25,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-07-09 18:10:25,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=5863, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:10:25,398 INFO L87 Difference]: Start difference. First operand 762 states and 1574 transitions. Second operand has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 18:10:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:51,427 INFO L93 Difference]: Finished difference Result 8032 states and 15779 transitions. [2021-07-09 18:10:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2021-07-09 18:10:51,427 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-07-09 18:10:51,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:51,447 INFO L225 Difference]: With dead ends: 8032 [2021-07-09 18:10:51,447 INFO L226 Difference]: Without dead ends: 5607 [2021-07-09 18:10:51,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41000 ImplicationChecksByTransitivity, 26579.4ms TimeCoverageRelationStatistics Valid=21491, Invalid=103471, Unknown=0, NotChecked=0, Total=124962 [2021-07-09 18:10:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-07-09 18:10:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 787. [2021-07-09 18:10:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.068702290076336) internal successors, (1626), 786 states have internal predecessors, (1626), 0 states have call successors, (0), 0 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 18:10:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1626 transitions. [2021-07-09 18:10:51,489 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1626 transitions. Word has length 49 [2021-07-09 18:10:51,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:51,489 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1626 transitions. [2021-07-09 18:10:51,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 18:10:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1626 transitions. [2021-07-09 18:10:51,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:10:51,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:51,491 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:51,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:10:51,705 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:51,705 INFO L82 PathProgramCache]: Analyzing trace with hash -154382910, now seen corresponding path program 36 times [2021-07-09 18:10:51,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:51,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082202974] [2021-07-09 18:10:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:52,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:52,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082202974] [2021-07-09 18:10:52,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082202974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:52,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899954635] [2021-07-09 18:10:52,762 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 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 18:10:52,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 18:10:52,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:52,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 87 conjunts are in the unsatisfiable core [2021-07-09 18:10:52,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:52,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:10:52,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:52,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:52,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:52,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:10:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:52,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899954635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:52,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:52,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-07-09 18:10:52,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482609142] [2021-07-09 18:10:52,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:10:52,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:52,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:10:52,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:10:52,924 INFO L87 Difference]: Start difference. First operand 787 states and 1626 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:55,579 INFO L93 Difference]: Finished difference Result 1651 states and 3252 transitions. [2021-07-09 18:10:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:10:55,579 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:10:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:55,582 INFO L225 Difference]: With dead ends: 1651 [2021-07-09 18:10:55,582 INFO L226 Difference]: Without dead ends: 1063 [2021-07-09 18:10:55,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2964.5ms TimeCoverageRelationStatistics Valid=1095, Invalid=6387, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:10:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-07-09 18:10:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 121. [2021-07-09 18:10:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.9666666666666666) internal successors, (236), 120 states have internal predecessors, (236), 0 states have call successors, (0), 0 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 18:10:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 236 transitions. [2021-07-09 18:10:55,588 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 236 transitions. Word has length 51 [2021-07-09 18:10:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:55,588 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 236 transitions. [2021-07-09 18:10:55,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:55,588 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 236 transitions. [2021-07-09 18:10:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 18:10:55,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:55,589 INFO L508 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:55,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:10:55,791 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:55,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:55,791 INFO L82 PathProgramCache]: Analyzing trace with hash -467832213, now seen corresponding path program 37 times [2021-07-09 18:10:55,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:55,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131161505] [2021-07-09 18:10:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:56,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:56,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131161505] [2021-07-09 18:10:56,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131161505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:56,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756563279] [2021-07-09 18:10:56,079 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 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 18:10:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:56,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:10:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:56,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756563279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:56,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:56,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2021-07-09 18:10:56,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805527299] [2021-07-09 18:10:56,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:10:56,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:56,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:10:56,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:10:56,245 INFO L87 Difference]: Start difference. First operand 121 states and 236 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:56,316 INFO L93 Difference]: Finished difference Result 1080 states and 2082 transitions. [2021-07-09 18:10:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:10:56,317 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-09 18:10:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:56,319 INFO L225 Difference]: With dead ends: 1080 [2021-07-09 18:10:56,319 INFO L226 Difference]: Without dead ends: 1035 [2021-07-09 18:10:56,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:10:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-07-09 18:10:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 903. [2021-07-09 18:10:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.0643015521064303) internal successors, (1862), 902 states have internal predecessors, (1862), 0 states have call successors, (0), 0 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 18:10:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1862 transitions. [2021-07-09 18:10:56,335 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1862 transitions. Word has length 52 [2021-07-09 18:10:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:56,335 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 1862 transitions. [2021-07-09 18:10:56,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1862 transitions. [2021-07-09 18:10:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 18:10:56,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:56,337 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:56,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:10:56,559 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:56,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:56,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1135766646, now seen corresponding path program 38 times [2021-07-09 18:10:56,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:56,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371331726] [2021-07-09 18:10:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:57,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:57,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371331726] [2021-07-09 18:10:57,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371331726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:57,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420950912] [2021-07-09 18:10:57,618 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 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 18:10:57,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:57,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2021-07-09 18:10:57,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:57,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:10:57,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:57,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:57,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:57,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:10:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:57,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420950912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:57,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:57,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-07-09 18:10:57,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235070242] [2021-07-09 18:10:57,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:57,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:57,771 INFO L87 Difference]: Start difference. First operand 903 states and 1862 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:00,736 INFO L93 Difference]: Finished difference Result 1845 states and 3635 transitions. [2021-07-09 18:11:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:11:00,736 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 18:11:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:00,738 INFO L225 Difference]: With dead ends: 1845 [2021-07-09 18:11:00,738 INFO L226 Difference]: Without dead ends: 1159 [2021-07-09 18:11:00,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3227.0ms TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 18:11:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-07-09 18:11:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 126. [2021-07-09 18:11:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 18:11:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 246 transitions. [2021-07-09 18:11:00,743 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 246 transitions. Word has length 53 [2021-07-09 18:11:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:00,743 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 246 transitions. [2021-07-09 18:11:00,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 246 transitions. [2021-07-09 18:11:00,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:11:00,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:00,743 INFO L508 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:00,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:11:00,966 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:00,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:00,967 INFO L82 PathProgramCache]: Analyzing trace with hash 872098359, now seen corresponding path program 39 times [2021-07-09 18:11:00,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:00,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089957313] [2021-07-09 18:11:00,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:01,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:01,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089957313] [2021-07-09 18:11:01,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089957313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:01,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172695006] [2021-07-09 18:11:01,253 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 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 18:11:01,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 18:11:01,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:01,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:01,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:01,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172695006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:01,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:01,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-07-09 18:11:01,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289568381] [2021-07-09 18:11:01,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:11:01,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:01,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:11:01,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:11:01,443 INFO L87 Difference]: Start difference. First operand 126 states and 246 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:01,509 INFO L93 Difference]: Finished difference Result 1163 states and 2245 transitions. [2021-07-09 18:11:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:11:01,510 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:11:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:01,512 INFO L225 Difference]: With dead ends: 1163 [2021-07-09 18:11:01,512 INFO L226 Difference]: Without dead ends: 1116 [2021-07-09 18:11:01,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:11:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-07-09 18:11:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 978. [2021-07-09 18:11:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.0624360286591608) internal successors, (2015), 977 states have internal predecessors, (2015), 0 states have call successors, (0), 0 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 18:11:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2015 transitions. [2021-07-09 18:11:01,527 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2015 transitions. Word has length 54 [2021-07-09 18:11:01,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:01,527 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 2015 transitions. [2021-07-09 18:11:01,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:01,528 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2015 transitions. [2021-07-09 18:11:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 18:11:01,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:01,529 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:01,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:01,743 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:01,744 INFO L82 PathProgramCache]: Analyzing trace with hash 37342594, now seen corresponding path program 40 times [2021-07-09 18:11:01,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:01,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178601065] [2021-07-09 18:11:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:02,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:02,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178601065] [2021-07-09 18:11:02,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178601065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:02,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624852808] [2021-07-09 18:11:02,914 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 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 18:11:02,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:02,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:02,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2021-07-09 18:11:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:03,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:11:03,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:03,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:03,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:03,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:11:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:03,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624852808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:03,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:03,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-07-09 18:11:03,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878900292] [2021-07-09 18:11:03,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-07-09 18:11:03,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:03,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-07-09 18:11:03,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:11:03,073 INFO L87 Difference]: Start difference. First operand 978 states and 2015 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:06,328 INFO L93 Difference]: Finished difference Result 1997 states and 3937 transitions. [2021-07-09 18:11:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:11:06,329 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 18:11:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:06,331 INFO L225 Difference]: With dead ends: 1997 [2021-07-09 18:11:06,331 INFO L226 Difference]: Without dead ends: 1257 [2021-07-09 18:11:06,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3501.9ms TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2021-07-09 18:11:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-07-09 18:11:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 131. [2021-07-09 18:11:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.9692307692307693) internal successors, (256), 130 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 18:11:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 256 transitions. [2021-07-09 18:11:06,336 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 256 transitions. Word has length 55 [2021-07-09 18:11:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:06,336 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 256 transitions. [2021-07-09 18:11:06,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 256 transitions. [2021-07-09 18:11:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 18:11:06,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:06,342 INFO L508 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:06,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:06,561 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:06,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:06,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1180691115, now seen corresponding path program 41 times [2021-07-09 18:11:06,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:06,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560177775] [2021-07-09 18:11:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:06,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:06,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560177775] [2021-07-09 18:11:06,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560177775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:06,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836094231] [2021-07-09 18:11:06,893 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 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 18:11:06,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-09 18:11:06,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:06,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:11:06,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:07,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836094231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:07,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:07,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-07-09 18:11:07,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580401643] [2021-07-09 18:11:07,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:11:07,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:11:07,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:11:07,091 INFO L87 Difference]: Start difference. First operand 131 states and 256 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:07,176 INFO L93 Difference]: Finished difference Result 1249 states and 2414 transitions. [2021-07-09 18:11:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:11:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 18:11:07,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:07,180 INFO L225 Difference]: With dead ends: 1249 [2021-07-09 18:11:07,180 INFO L226 Difference]: Without dead ends: 1200 [2021-07-09 18:11:07,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:11:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-07-09 18:11:07,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1056. [2021-07-09 18:11:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 2.060663507109005) internal successors, (2174), 1055 states have internal predecessors, (2174), 0 states have call successors, (0), 0 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 18:11:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2174 transitions. [2021-07-09 18:11:07,196 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2174 transitions. Word has length 56 [2021-07-09 18:11:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:07,197 INFO L482 AbstractCegarLoop]: Abstraction has 1056 states and 2174 transitions. [2021-07-09 18:11:07,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2174 transitions. [2021-07-09 18:11:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 18:11:07,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:07,199 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:07,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:11:07,405 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2139285302, now seen corresponding path program 42 times [2021-07-09 18:11:07,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:07,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797132453] [2021-07-09 18:11:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:08,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:08,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797132453] [2021-07-09 18:11:08,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797132453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:08,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405967898] [2021-07-09 18:11:08,640 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 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 18:11:08,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-09 18:11:08,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:08,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 99 conjunts are in the unsatisfiable core [2021-07-09 18:11:08,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:08,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:11:08,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:08,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:08,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:08,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:11:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:08,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405967898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:08,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:08,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-07-09 18:11:08,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255749666] [2021-07-09 18:11:08,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:11:08,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:08,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:11:08,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:11:08,827 INFO L87 Difference]: Start difference. First operand 1056 states and 2174 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:12,442 INFO L93 Difference]: Finished difference Result 2155 states and 4251 transitions. [2021-07-09 18:11:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:11:12,443 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-07-09 18:11:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:12,450 INFO L225 Difference]: With dead ends: 2155 [2021-07-09 18:11:12,450 INFO L226 Difference]: Without dead ends: 1359 [2021-07-09 18:11:12,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3900.1ms TimeCoverageRelationStatistics Valid=1395, Invalid=8307, Unknown=0, NotChecked=0, Total=9702 [2021-07-09 18:11:12,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-07-09 18:11:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 136. [2021-07-09 18:11:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 135 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 18:11:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 266 transitions. [2021-07-09 18:11:12,459 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 266 transitions. Word has length 57 [2021-07-09 18:11:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:12,459 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 266 transitions. [2021-07-09 18:11:12,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 266 transitions. [2021-07-09 18:11:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-07-09 18:11:12,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:12,460 INFO L508 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:12,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:12,683 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:12,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:12,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1916405623, now seen corresponding path program 43 times [2021-07-09 18:11:12,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:12,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647760326] [2021-07-09 18:11:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:13,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:13,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647760326] [2021-07-09 18:11:13,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647760326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:13,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409483959] [2021-07-09 18:11:13,056 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 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 18:11:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:13,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:11:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:13,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409483959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:13,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:13,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 27 [2021-07-09 18:11:13,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840297494] [2021-07-09 18:11:13,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:11:13,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:13,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:11:13,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:11:13,239 INFO L87 Difference]: Start difference. First operand 136 states and 266 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:13,350 INFO L93 Difference]: Finished difference Result 1338 states and 2589 transitions. [2021-07-09 18:11:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:11:13,350 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-07-09 18:11:13,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:13,353 INFO L225 Difference]: With dead ends: 1338 [2021-07-09 18:11:13,353 INFO L226 Difference]: Without dead ends: 1287 [2021-07-09 18:11:13,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:11:13,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-07-09 18:11:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1137. [2021-07-09 18:11:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.0589788732394365) internal successors, (2339), 1136 states have internal predecessors, (2339), 0 states have call successors, (0), 0 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 18:11:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2339 transitions. [2021-07-09 18:11:13,370 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2339 transitions. Word has length 58 [2021-07-09 18:11:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:13,371 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 2339 transitions. [2021-07-09 18:11:13,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2339 transitions. [2021-07-09 18:11:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 18:11:13,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:13,373 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:13,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:13,581 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash -292549310, now seen corresponding path program 44 times [2021-07-09 18:11:13,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:13,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240874782] [2021-07-09 18:11:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:14,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:14,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240874782] [2021-07-09 18:11:14,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240874782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:14,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629418189] [2021-07-09 18:11:14,912 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 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 18:11:14,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:14,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:14,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2021-07-09 18:11:14,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:15,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:11:15,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:15,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:15,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:15,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:11:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:15,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629418189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:15,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:15,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-07-09 18:11:15,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951244171] [2021-07-09 18:11:15,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-07-09 18:11:15,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:15,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-07-09 18:11:15,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:11:15,075 INFO L87 Difference]: Start difference. First operand 1137 states and 2339 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:18,907 INFO L93 Difference]: Finished difference Result 2319 states and 4577 transitions. [2021-07-09 18:11:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:11:18,907 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 18:11:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:18,910 INFO L225 Difference]: With dead ends: 2319 [2021-07-09 18:11:18,910 INFO L226 Difference]: Without dead ends: 1465 [2021-07-09 18:11:18,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 4168.0ms TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2021-07-09 18:11:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-07-09 18:11:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 141. [2021-07-09 18:11:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 18:11:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 276 transitions. [2021-07-09 18:11:18,920 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 276 transitions. Word has length 59 [2021-07-09 18:11:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:18,920 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 276 transitions. [2021-07-09 18:11:18,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 276 transitions. [2021-07-09 18:11:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-07-09 18:11:18,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:18,921 INFO L508 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:19,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 18:11:19,144 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:19,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:19,144 INFO L82 PathProgramCache]: Analyzing trace with hash -456023317, now seen corresponding path program 45 times [2021-07-09 18:11:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:19,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120891171] [2021-07-09 18:11:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:19,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:19,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120891171] [2021-07-09 18:11:19,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120891171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:19,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845721893] [2021-07-09 18:11:19,524 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 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 18:11:19,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-09 18:11:19,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:19,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 18:11:19,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:19,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845721893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:19,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:19,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2021-07-09 18:11:19,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289356855] [2021-07-09 18:11:19,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:11:19,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:11:19,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:11:19,730 INFO L87 Difference]: Start difference. First operand 141 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:19,806 INFO L93 Difference]: Finished difference Result 1430 states and 2770 transitions. [2021-07-09 18:11:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:11:19,806 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-07-09 18:11:19,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:19,809 INFO L225 Difference]: With dead ends: 1430 [2021-07-09 18:11:19,809 INFO L226 Difference]: Without dead ends: 1377 [2021-07-09 18:11:19,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 331.9ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:11:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-07-09 18:11:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1221. [2021-07-09 18:11:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.057377049180328) internal successors, (2510), 1220 states have internal predecessors, (2510), 0 states have call successors, (0), 0 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 18:11:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2510 transitions. [2021-07-09 18:11:19,832 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2510 transitions. Word has length 60 [2021-07-09 18:11:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:19,832 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 2510 transitions. [2021-07-09 18:11:19,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2510 transitions. [2021-07-09 18:11:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-09 18:11:19,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:19,835 INFO L508 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:20,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 18:11:20,057 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:20,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1547869706, now seen corresponding path program 46 times [2021-07-09 18:11:20,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:20,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733429669] [2021-07-09 18:11:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:21,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:21,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733429669] [2021-07-09 18:11:21,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733429669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:21,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013056586] [2021-07-09 18:11:21,615 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 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 18:11:21,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:21,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:21,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2021-07-09 18:11:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:21,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:11:21,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:21,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:21,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:21,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:11:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:21,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013056586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:21,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:21,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-07-09 18:11:21,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828583976] [2021-07-09 18:11:21,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-07-09 18:11:21,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:21,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-07-09 18:11:21,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:11:21,806 INFO L87 Difference]: Start difference. First operand 1221 states and 2510 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:25,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:25,973 INFO L93 Difference]: Finished difference Result 2489 states and 4915 transitions. [2021-07-09 18:11:25,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:11:25,974 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-07-09 18:11:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:25,976 INFO L225 Difference]: With dead ends: 2489 [2021-07-09 18:11:25,976 INFO L226 Difference]: Without dead ends: 1575 [2021-07-09 18:11:25,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4637.9ms TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 18:11:25,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-07-09 18:11:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 146. [2021-07-09 18:11:25,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.9724137931034482) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 18:11:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2021-07-09 18:11:25,983 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 61 [2021-07-09 18:11:25,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:25,983 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2021-07-09 18:11:25,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:25,983 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2021-07-09 18:11:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-09 18:11:25,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:25,983 INFO L508 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:26,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:11:26,184 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:26,184 INFO L82 PathProgramCache]: Analyzing trace with hash -716249929, now seen corresponding path program 47 times [2021-07-09 18:11:26,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:26,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501528454] [2021-07-09 18:11:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:26,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:26,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501528454] [2021-07-09 18:11:26,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501528454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:26,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757872182] [2021-07-09 18:11:26,552 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 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 18:11:26,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-09 18:11:26,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:26,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2021-07-09 18:11:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:26,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757872182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:26,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:26,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2021-07-09 18:11:26,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987596179] [2021-07-09 18:11:26,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:11:26,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:26,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:11:26,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:11:26,737 INFO L87 Difference]: Start difference. First operand 146 states and 286 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:11:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:26,817 INFO L93 Difference]: Finished difference Result 1525 states and 2957 transitions. [2021-07-09 18:11:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:11:26,818 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-09 18:11:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:26,820 INFO L225 Difference]: With dead ends: 1525 [2021-07-09 18:11:26,820 INFO L226 Difference]: Without dead ends: 1470 [2021-07-09 18:11:26,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:11:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-07-09 18:11:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1308. [2021-07-09 18:11:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0558530986993113) internal successors, (2687), 1307 states have internal predecessors, (2687), 0 states have call successors, (0), 0 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 18:11:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2687 transitions. [2021-07-09 18:11:26,840 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2687 transitions. Word has length 62 [2021-07-09 18:11:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:26,840 INFO L482 AbstractCegarLoop]: Abstraction has 1308 states and 2687 transitions. [2021-07-09 18:11:26,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:11:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2687 transitions. [2021-07-09 18:11:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 18:11:26,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:26,842 INFO L508 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:27,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:27,065 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2008609534, now seen corresponding path program 48 times [2021-07-09 18:11:27,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:27,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053096058] [2021-07-09 18:11:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:28,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:28,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053096058] [2021-07-09 18:11:28,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053096058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:28,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552457219] [2021-07-09 18:11:28,697 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 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 18:11:28,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-09 18:11:28,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:28,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2021-07-09 18:11:28,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:28,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:11:28,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:28,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:28,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:28,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:11:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:28,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552457219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:28,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:28,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-07-09 18:11:28,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679064624] [2021-07-09 18:11:28,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-09 18:11:28,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:28,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-09 18:11:28,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:11:28,873 INFO L87 Difference]: Start difference. First operand 1308 states and 2687 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:33,395 INFO L93 Difference]: Finished difference Result 2665 states and 5265 transitions. [2021-07-09 18:11:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:11:33,396 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 18:11:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:33,398 INFO L225 Difference]: With dead ends: 2665 [2021-07-09 18:11:33,398 INFO L226 Difference]: Without dead ends: 1689 [2021-07-09 18:11:33,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4990.1ms TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2021-07-09 18:11:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-07-09 18:11:33,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 151. [2021-07-09 18:11:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 150 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 18:11:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 296 transitions. [2021-07-09 18:11:33,406 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 296 transitions. Word has length 63 [2021-07-09 18:11:33,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:33,406 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 296 transitions. [2021-07-09 18:11:33,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 296 transitions. [2021-07-09 18:11:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-07-09 18:11:33,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:33,407 INFO L508 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:33,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:11:33,629 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:33,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2114282709, now seen corresponding path program 49 times [2021-07-09 18:11:33,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:33,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80312956] [2021-07-09 18:11:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:34,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:34,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80312956] [2021-07-09 18:11:34,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80312956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:34,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631218638] [2021-07-09 18:11:34,023 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 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 18:11:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-09 18:11:34,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:34,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631218638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:34,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:34,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-07-09 18:11:34,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911081668] [2021-07-09 18:11:34,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:11:34,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:34,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:11:34,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:11:34,241 INFO L87 Difference]: Start difference. First operand 151 states and 296 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:11:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:34,332 INFO L93 Difference]: Finished difference Result 1623 states and 3150 transitions. [2021-07-09 18:11:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:11:34,333 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-07-09 18:11:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:34,336 INFO L225 Difference]: With dead ends: 1623 [2021-07-09 18:11:34,336 INFO L226 Difference]: Without dead ends: 1566 [2021-07-09 18:11:34,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:11:34,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-07-09 18:11:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-07-09 18:11:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.0544022906227632) internal successors, (2870), 1397 states have internal predecessors, (2870), 0 states have call successors, (0), 0 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 18:11:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2870 transitions. [2021-07-09 18:11:34,359 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2870 transitions. Word has length 64 [2021-07-09 18:11:34,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:34,359 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 2870 transitions. [2021-07-09 18:11:34,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:11:34,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2870 transitions. [2021-07-09 18:11:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 18:11:34,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:34,361 INFO L508 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:34,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:34,578 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:34,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1468652726, now seen corresponding path program 50 times [2021-07-09 18:11:34,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:34,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297810650] [2021-07-09 18:11:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:36,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:36,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297810650] [2021-07-09 18:11:36,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297810650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:36,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940021273] [2021-07-09 18:11:36,154 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:36,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:36,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:36,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 115 conjunts are in the unsatisfiable core [2021-07-09 18:11:36,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:36,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:11:36,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:36,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:36,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:36,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:11:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:36,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940021273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:36,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:36,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-07-09 18:11:36,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669239896] [2021-07-09 18:11:36,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-07-09 18:11:36,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:36,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-07-09 18:11:36,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:11:36,343 INFO L87 Difference]: Start difference. First operand 1398 states and 2870 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:11:41,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:41,245 INFO L93 Difference]: Finished difference Result 2847 states and 5627 transitions. [2021-07-09 18:11:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:11:41,245 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 18:11:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:41,248 INFO L225 Difference]: With dead ends: 2847 [2021-07-09 18:11:41,248 INFO L226 Difference]: Without dead ends: 1807 [2021-07-09 18:11:41,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 5240.6ms TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2021-07-09 18:11:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-07-09 18:11:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 156. [2021-07-09 18:11:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.9741935483870967) internal successors, (306), 155 states have internal predecessors, (306), 0 states have call successors, (0), 0 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 18:11:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 306 transitions. [2021-07-09 18:11:41,255 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 306 transitions. Word has length 65 [2021-07-09 18:11:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:41,255 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 306 transitions. [2021-07-09 18:11:41,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:11:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 306 transitions. [2021-07-09 18:11:41,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 18:11:41,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:41,256 INFO L508 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:41,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:41,457 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:41,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:41,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1693335049, now seen corresponding path program 51 times [2021-07-09 18:11:41,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:41,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563113889] [2021-07-09 18:11:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:41,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:41,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563113889] [2021-07-09 18:11:41,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563113889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:41,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759166765] [2021-07-09 18:11:41,869 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:41,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-07-09 18:11:41,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:41,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:11:41,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:42,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759166765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:42,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:42,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-07-09 18:11:42,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596797996] [2021-07-09 18:11:42,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:11:42,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:42,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:11:42,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:11:42,065 INFO L87 Difference]: Start difference. First operand 156 states and 306 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:11:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:42,152 INFO L93 Difference]: Finished difference Result 1724 states and 3349 transitions. [2021-07-09 18:11:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:11:42,152 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 18:11:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:42,154 INFO L225 Difference]: With dead ends: 1724 [2021-07-09 18:11:42,154 INFO L226 Difference]: Without dead ends: 1665 [2021-07-09 18:11:42,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:11:42,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-07-09 18:11:42,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1491. [2021-07-09 18:11:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 2.0530201342281877) internal successors, (3059), 1490 states have internal predecessors, (3059), 0 states have call successors, (0), 0 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 18:11:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3059 transitions. [2021-07-09 18:11:42,171 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3059 transitions. Word has length 66 [2021-07-09 18:11:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:42,171 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 3059 transitions. [2021-07-09 18:11:42,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:11:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3059 transitions. [2021-07-09 18:11:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 18:11:42,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:42,173 INFO L508 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:42,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 18:11:42,373 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:42,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:42,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1238813890, now seen corresponding path program 52 times [2021-07-09 18:11:42,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:42,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024549749] [2021-07-09 18:11:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:44,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:44,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024549749] [2021-07-09 18:11:44,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024549749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:44,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812365664] [2021-07-09 18:11:44,145 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:44,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:44,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2021-07-09 18:11:44,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:44,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:11:44,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:44,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:44,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:44,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:11:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:44,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812365664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:44,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:44,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-07-09 18:11:44,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146574180] [2021-07-09 18:11:44,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-07-09 18:11:44,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:44,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-07-09 18:11:44,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:11:44,328 INFO L87 Difference]: Start difference. First operand 1491 states and 3059 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:11:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:49,632 INFO L93 Difference]: Finished difference Result 3035 states and 6001 transitions. [2021-07-09 18:11:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:11:49,633 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-09 18:11:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:49,635 INFO L225 Difference]: With dead ends: 3035 [2021-07-09 18:11:49,635 INFO L226 Difference]: Without dead ends: 1929 [2021-07-09 18:11:49,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5760.0ms TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2021-07-09 18:11:49,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-07-09 18:11:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 161. [2021-07-09 18:11:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.975) internal successors, (316), 160 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 18:11:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 316 transitions. [2021-07-09 18:11:49,642 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 316 transitions. Word has length 67 [2021-07-09 18:11:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:49,642 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 316 transitions. [2021-07-09 18:11:49,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:11:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 316 transitions. [2021-07-09 18:11:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-07-09 18:11:49,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:49,642 INFO L508 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:49,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:49,843 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:49,843 INFO L82 PathProgramCache]: Analyzing trace with hash -228404373, now seen corresponding path program 53 times [2021-07-09 18:11:49,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:49,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439172500] [2021-07-09 18:11:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:50,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:50,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439172500] [2021-07-09 18:11:50,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439172500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:50,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983255507] [2021-07-09 18:11:50,291 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:50,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-09 18:11:50,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:50,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-09 18:11:50,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:50,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983255507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:50,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:50,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-07-09 18:11:50,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966526759] [2021-07-09 18:11:50,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:11:50,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:50,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:11:50,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:11:50,489 INFO L87 Difference]: Start difference. First operand 161 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:50,583 INFO L93 Difference]: Finished difference Result 1828 states and 3554 transitions. [2021-07-09 18:11:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:11:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-07-09 18:11:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:50,585 INFO L225 Difference]: With dead ends: 1828 [2021-07-09 18:11:50,585 INFO L226 Difference]: Without dead ends: 1767 [2021-07-09 18:11:50,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:11:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-07-09 18:11:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1587. [2021-07-09 18:11:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.051702395964691) internal successors, (3254), 1586 states have internal predecessors, (3254), 0 states have call successors, (0), 0 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 18:11:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3254 transitions. [2021-07-09 18:11:50,600 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3254 transitions. Word has length 68 [2021-07-09 18:11:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:50,600 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 3254 transitions. [2021-07-09 18:11:50,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3254 transitions. [2021-07-09 18:11:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-09 18:11:50,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:50,602 INFO L508 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:50,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 18:11:50,817 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:50,817 INFO L82 PathProgramCache]: Analyzing trace with hash 68179830, now seen corresponding path program 54 times [2021-07-09 18:11:50,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:50,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030620591] [2021-07-09 18:11:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:52,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:52,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030620591] [2021-07-09 18:11:52,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030620591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:52,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399599026] [2021-07-09 18:11:52,753 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:52,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-09 18:11:52,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:52,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2021-07-09 18:11:52,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:52,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:11:52,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:52,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:52,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:52,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:11:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:52,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399599026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:52,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:52,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-07-09 18:11:52,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660577590] [2021-07-09 18:11:52,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-07-09 18:11:52,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:52,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-07-09 18:11:52,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:11:52,945 INFO L87 Difference]: Start difference. First operand 1587 states and 3254 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:11:58,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:58,700 INFO L93 Difference]: Finished difference Result 3229 states and 6387 transitions. [2021-07-09 18:11:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:11:58,701 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-07-09 18:11:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:58,704 INFO L225 Difference]: With dead ends: 3229 [2021-07-09 18:11:58,704 INFO L226 Difference]: Without dead ends: 2055 [2021-07-09 18:11:58,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 6296.7ms TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2021-07-09 18:11:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-07-09 18:11:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 166. [2021-07-09 18:11:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 165 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 18:11:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 326 transitions. [2021-07-09 18:11:58,713 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 326 transitions. Word has length 69 [2021-07-09 18:11:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:58,713 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 326 transitions. [2021-07-09 18:11:58,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:11:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 326 transitions. [2021-07-09 18:11:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-07-09 18:11:58,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:58,713 INFO L508 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:58,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:11:58,914 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:58,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:58,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2136645431, now seen corresponding path program 55 times [2021-07-09 18:11:58,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:58,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126358279] [2021-07-09 18:11:58,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:59,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:59,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126358279] [2021-07-09 18:11:59,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126358279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:59,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614796778] [2021-07-09 18:11:59,394 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:59,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2021-07-09 18:11:59,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:59,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614796778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:59,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:59,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2021-07-09 18:11:59,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576859150] [2021-07-09 18:11:59,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:11:59,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:11:59,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:11:59,693 INFO L87 Difference]: Start difference. First operand 166 states and 326 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:11:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:59,791 INFO L93 Difference]: Finished difference Result 1935 states and 3765 transitions. [2021-07-09 18:11:59,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:11:59,792 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-07-09 18:11:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:59,794 INFO L225 Difference]: With dead ends: 1935 [2021-07-09 18:11:59,794 INFO L226 Difference]: Without dead ends: 1872 [2021-07-09 18:11:59,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:11:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-07-09 18:11:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1686. [2021-07-09 18:11:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.050445103857567) internal successors, (3455), 1685 states have internal predecessors, (3455), 0 states have call successors, (0), 0 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 18:11:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 3455 transitions. [2021-07-09 18:11:59,810 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 3455 transitions. Word has length 70 [2021-07-09 18:11:59,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:59,810 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 3455 transitions. [2021-07-09 18:11:59,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:11:59,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 3455 transitions. [2021-07-09 18:11:59,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 18:11:59,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:59,811 INFO L508 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:00,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:00,017 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:00,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:00,018 INFO L82 PathProgramCache]: Analyzing trace with hash -608744318, now seen corresponding path program 56 times [2021-07-09 18:12:00,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:00,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828995059] [2021-07-09 18:12:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:01,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:01,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828995059] [2021-07-09 18:12:01,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828995059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:01,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267476340] [2021-07-09 18:12:01,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:02,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:02,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:02,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2021-07-09 18:12:02,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:02,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:12:02,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:02,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:02,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:02,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:12:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:02,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267476340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:02,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:02,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-07-09 18:12:02,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259626263] [2021-07-09 18:12:02,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-07-09 18:12:02,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:02,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-07-09 18:12:02,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:12:02,146 INFO L87 Difference]: Start difference. First operand 1686 states and 3455 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:08,430 INFO L93 Difference]: Finished difference Result 3429 states and 6785 transitions. [2021-07-09 18:12:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:12:08,430 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-09 18:12:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:08,433 INFO L225 Difference]: With dead ends: 3429 [2021-07-09 18:12:08,433 INFO L226 Difference]: Without dead ends: 2185 [2021-07-09 18:12:08,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 6639.3ms TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2021-07-09 18:12:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-07-09 18:12:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 171. [2021-07-09 18:12:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.9764705882352942) internal successors, (336), 170 states have internal predecessors, (336), 0 states have call successors, (0), 0 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 18:12:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2021-07-09 18:12:08,441 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 71 [2021-07-09 18:12:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:08,441 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2021-07-09 18:12:08,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2021-07-09 18:12:08,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-07-09 18:12:08,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:08,441 INFO L508 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:08,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 18:12:08,643 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1668133973, now seen corresponding path program 57 times [2021-07-09 18:12:08,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:08,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063035065] [2021-07-09 18:12:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:09,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:09,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063035065] [2021-07-09 18:12:09,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063035065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:09,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997976477] [2021-07-09 18:12:09,129 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:09,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-09 18:12:09,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:09,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-09 18:12:09,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:09,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997976477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:09,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:09,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 34 [2021-07-09 18:12:09,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895085586] [2021-07-09 18:12:09,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:12:09,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:09,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:12:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:12:09,345 INFO L87 Difference]: Start difference. First operand 171 states and 336 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:09,448 INFO L93 Difference]: Finished difference Result 2045 states and 3982 transitions. [2021-07-09 18:12:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:12:09,448 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-07-09 18:12:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:09,450 INFO L225 Difference]: With dead ends: 2045 [2021-07-09 18:12:09,450 INFO L226 Difference]: Without dead ends: 1980 [2021-07-09 18:12:09,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 445.2ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:12:09,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-07-09 18:12:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1788. [2021-07-09 18:12:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 2.0492445439283715) internal successors, (3662), 1787 states have internal predecessors, (3662), 0 states have call successors, (0), 0 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 18:12:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 3662 transitions. [2021-07-09 18:12:09,472 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 3662 transitions. Word has length 72 [2021-07-09 18:12:09,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:09,472 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 3662 transitions. [2021-07-09 18:12:09,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 3662 transitions. [2021-07-09 18:12:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-07-09 18:12:09,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:09,474 INFO L508 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:09,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:09,674 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:09,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:09,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1417204278, now seen corresponding path program 58 times [2021-07-09 18:12:09,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:09,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820829426] [2021-07-09 18:12:09,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:11,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:11,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820829426] [2021-07-09 18:12:11,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820829426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:11,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39098894] [2021-07-09 18:12:11,725 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:11,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:11,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:11,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2021-07-09 18:12:11,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:11,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:12:11,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:11,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:11,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:11,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:12:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:11,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39098894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:11,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:11,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-07-09 18:12:11,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46721267] [2021-07-09 18:12:11,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-07-09 18:12:11,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-07-09 18:12:11,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:12:11,919 INFO L87 Difference]: Start difference. First operand 1788 states and 3662 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:12:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:18,550 INFO L93 Difference]: Finished difference Result 3635 states and 7195 transitions. [2021-07-09 18:12:18,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:12:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-07-09 18:12:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:18,552 INFO L225 Difference]: With dead ends: 3635 [2021-07-09 18:12:18,552 INFO L226 Difference]: Without dead ends: 2319 [2021-07-09 18:12:18,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 7079.0ms TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2021-07-09 18:12:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-07-09 18:12:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 176. [2021-07-09 18:12:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.977142857142857) internal successors, (346), 175 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 18:12:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 346 transitions. [2021-07-09 18:12:18,563 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 346 transitions. Word has length 73 [2021-07-09 18:12:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:18,563 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 346 transitions. [2021-07-09 18:12:18,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:12:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 346 transitions. [2021-07-09 18:12:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-07-09 18:12:18,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:18,564 INFO L508 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:18,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:12:18,780 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:18,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:18,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1006730359, now seen corresponding path program 59 times [2021-07-09 18:12:18,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:18,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508647067] [2021-07-09 18:12:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:19,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:19,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508647067] [2021-07-09 18:12:19,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508647067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:19,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865796271] [2021-07-09 18:12:19,308 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:19,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-07-09 18:12:19,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:19,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-09 18:12:19,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:19,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865796271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:19,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:19,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2021-07-09 18:12:19,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868115841] [2021-07-09 18:12:19,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:12:19,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:19,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:12:19,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:12:19,527 INFO L87 Difference]: Start difference. First operand 176 states and 346 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:12:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:19,634 INFO L93 Difference]: Finished difference Result 2158 states and 4205 transitions. [2021-07-09 18:12:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:12:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-07-09 18:12:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:19,636 INFO L225 Difference]: With dead ends: 2158 [2021-07-09 18:12:19,637 INFO L226 Difference]: Without dead ends: 2091 [2021-07-09 18:12:19,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:12:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-07-09 18:12:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1893. [2021-07-09 18:12:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.0480972515856237) internal successors, (3875), 1892 states have internal predecessors, (3875), 0 states have call successors, (0), 0 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 18:12:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3875 transitions. [2021-07-09 18:12:19,653 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3875 transitions. Word has length 74 [2021-07-09 18:12:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:19,653 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 3875 transitions. [2021-07-09 18:12:19,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:12:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3875 transitions. [2021-07-09 18:12:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-07-09 18:12:19,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:19,654 INFO L508 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:19,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:19,855 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:19,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1805611966, now seen corresponding path program 60 times [2021-07-09 18:12:19,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:19,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335624922] [2021-07-09 18:12:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:21,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:21,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335624922] [2021-07-09 18:12:21,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335624922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:21,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930666729] [2021-07-09 18:12:21,989 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:22,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-07-09 18:12:22,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:22,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2021-07-09 18:12:22,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:22,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:12:22,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:22,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:22,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:22,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:12:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:22,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930666729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:22,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:22,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-07-09 18:12:22,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861989222] [2021-07-09 18:12:22,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-07-09 18:12:22,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:22,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-07-09 18:12:22,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:12:22,199 INFO L87 Difference]: Start difference. First operand 1893 states and 3875 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:29,309 INFO L93 Difference]: Finished difference Result 3847 states and 7617 transitions. [2021-07-09 18:12:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:12:29,309 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-07-09 18:12:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:29,312 INFO L225 Difference]: With dead ends: 3847 [2021-07-09 18:12:29,312 INFO L226 Difference]: Without dead ends: 2457 [2021-07-09 18:12:29,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 7552.5ms TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2021-07-09 18:12:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-07-09 18:12:29,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 181. [2021-07-09 18:12:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.9777777777777779) internal successors, (356), 180 states have internal predecessors, (356), 0 states have call successors, (0), 0 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 18:12:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 356 transitions. [2021-07-09 18:12:29,321 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 356 transitions. Word has length 75 [2021-07-09 18:12:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:29,321 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 356 transitions. [2021-07-09 18:12:29,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 356 transitions. [2021-07-09 18:12:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 18:12:29,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:29,321 INFO L508 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:29,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-09 18:12:29,522 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:29,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:29,522 INFO L82 PathProgramCache]: Analyzing trace with hash -116325397, now seen corresponding path program 61 times [2021-07-09 18:12:29,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:29,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443918256] [2021-07-09 18:12:29,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:30,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:30,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443918256] [2021-07-09 18:12:30,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443918256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:30,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036500310] [2021-07-09 18:12:30,069 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:30,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2021-07-09 18:12:30,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:30,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036500310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:30,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:30,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2021-07-09 18:12:30,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940501893] [2021-07-09 18:12:30,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:30,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:30,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:30,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:30,276 INFO L87 Difference]: Start difference. First operand 181 states and 356 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:30,405 INFO L93 Difference]: Finished difference Result 2274 states and 4434 transitions. [2021-07-09 18:12:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:12:30,405 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 18:12:30,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:30,408 INFO L225 Difference]: With dead ends: 2274 [2021-07-09 18:12:30,408 INFO L226 Difference]: Without dead ends: 2205 [2021-07-09 18:12:30,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 501.5ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-07-09 18:12:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2001. [2021-07-09 18:12:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 2.047) internal successors, (4094), 2000 states have internal predecessors, (4094), 0 states have call successors, (0), 0 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 18:12:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 4094 transitions. [2021-07-09 18:12:30,427 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 4094 transitions. Word has length 76 [2021-07-09 18:12:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:30,427 INFO L482 AbstractCegarLoop]: Abstraction has 2001 states and 4094 transitions. [2021-07-09 18:12:30,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 4094 transitions. [2021-07-09 18:12:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-07-09 18:12:30,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:30,429 INFO L508 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:30,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:30,630 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1242870538, now seen corresponding path program 62 times [2021-07-09 18:12:30,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:30,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903866767] [2021-07-09 18:12:30,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:32,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:32,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903866767] [2021-07-09 18:12:32,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903866767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:32,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581901917] [2021-07-09 18:12:32,841 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:32,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:32,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:32,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 139 conjunts are in the unsatisfiable core [2021-07-09 18:12:32,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:33,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:12:33,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:33,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:33,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:33,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:12:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:33,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581901917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:33,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:33,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-07-09 18:12:33,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569404118] [2021-07-09 18:12:33,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-09 18:12:33,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:33,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-09 18:12:33,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:12:33,072 INFO L87 Difference]: Start difference. First operand 2001 states and 4094 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:12:40,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:40,781 INFO L93 Difference]: Finished difference Result 4065 states and 8051 transitions. [2021-07-09 18:12:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:12:40,781 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-07-09 18:12:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:40,784 INFO L225 Difference]: With dead ends: 4065 [2021-07-09 18:12:40,784 INFO L226 Difference]: Without dead ends: 2599 [2021-07-09 18:12:40,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 8100.0ms TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2021-07-09 18:12:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-07-09 18:12:40,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 186. [2021-07-09 18:12:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.9783783783783784) internal successors, (366), 185 states have internal predecessors, (366), 0 states have call successors, (0), 0 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 18:12:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 366 transitions. [2021-07-09 18:12:40,793 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 366 transitions. Word has length 77 [2021-07-09 18:12:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:40,793 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 366 transitions. [2021-07-09 18:12:40,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:12:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 366 transitions. [2021-07-09 18:12:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-07-09 18:12:40,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:40,794 INFO L508 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:41,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 18:12:41,009 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash 148789687, now seen corresponding path program 63 times [2021-07-09 18:12:41,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:41,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921086872] [2021-07-09 18:12:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:41,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:41,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921086872] [2021-07-09 18:12:41,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921086872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:41,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588889618] [2021-07-09 18:12:41,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:41,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-07-09 18:12:41,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:41,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2021-07-09 18:12:41,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:41,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588889618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:41,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:41,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 37 [2021-07-09 18:12:41,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572256279] [2021-07-09 18:12:41,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:12:41,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:41,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:12:41,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:12:41,878 INFO L87 Difference]: Start difference. First operand 186 states and 366 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 18:12:41,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:41,998 INFO L93 Difference]: Finished difference Result 2393 states and 4669 transitions. [2021-07-09 18:12:41,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:12:41,999 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-07-09 18:12:41,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:42,001 INFO L225 Difference]: With dead ends: 2393 [2021-07-09 18:12:42,001 INFO L226 Difference]: Without dead ends: 2322 [2021-07-09 18:12:42,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 586.6ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:12:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-07-09 18:12:42,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2112. [2021-07-09 18:12:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.045949786830886) internal successors, (4319), 2111 states have internal predecessors, (4319), 0 states have call successors, (0), 0 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 18:12:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4319 transitions. [2021-07-09 18:12:42,023 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4319 transitions. Word has length 78 [2021-07-09 18:12:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:42,023 INFO L482 AbstractCegarLoop]: Abstraction has 2112 states and 4319 transitions. [2021-07-09 18:12:42,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 18:12:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4319 transitions. [2021-07-09 18:12:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-07-09 18:12:42,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:42,026 INFO L508 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:42,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:42,241 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -129332222, now seen corresponding path program 64 times [2021-07-09 18:12:42,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:42,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972545425] [2021-07-09 18:12:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:44,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:44,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972545425] [2021-07-09 18:12:44,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972545425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:44,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999254307] [2021-07-09 18:12:44,574 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:44,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:44,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:44,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2021-07-09 18:12:44,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:44,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:12:44,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:44,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:44,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:44,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:12:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:44,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999254307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:44,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:44,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-07-09 18:12:44,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162083163] [2021-07-09 18:12:44,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-07-09 18:12:44,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:44,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-07-09 18:12:44,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:12:44,785 INFO L87 Difference]: Start difference. First operand 2112 states and 4319 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:48,501 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-09 18:12:53,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:53,003 INFO L93 Difference]: Finished difference Result 4289 states and 8497 transitions. [2021-07-09 18:12:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:12:53,003 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-07-09 18:12:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:53,006 INFO L225 Difference]: With dead ends: 4289 [2021-07-09 18:12:53,006 INFO L226 Difference]: Without dead ends: 2745 [2021-07-09 18:12:53,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 8643.7ms TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2021-07-09 18:12:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-07-09 18:12:53,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 191. [2021-07-09 18:12:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.9789473684210526) internal successors, (376), 190 states have internal predecessors, (376), 0 states have call successors, (0), 0 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 18:12:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 376 transitions. [2021-07-09 18:12:53,016 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 376 transitions. Word has length 79 [2021-07-09 18:12:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:53,016 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 376 transitions. [2021-07-09 18:12:53,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 376 transitions. [2021-07-09 18:12:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-09 18:12:53,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:53,017 INFO L508 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:53,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:12:53,217 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:53,217 INFO L82 PathProgramCache]: Analyzing trace with hash 308739115, now seen corresponding path program 65 times [2021-07-09 18:12:53,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:53,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713374873] [2021-07-09 18:12:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:53,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:53,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713374873] [2021-07-09 18:12:53,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713374873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:53,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820303354] [2021-07-09 18:12:53,871 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:53,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-07-09 18:12:53,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:53,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2021-07-09 18:12:53,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:54,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820303354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:54,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:54,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 38 [2021-07-09 18:12:54,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335830701] [2021-07-09 18:12:54,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:12:54,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:12:54,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:12:54,153 INFO L87 Difference]: Start difference. First operand 191 states and 376 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 18:12:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:54,305 INFO L93 Difference]: Finished difference Result 2515 states and 4910 transitions. [2021-07-09 18:12:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:12:54,306 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-07-09 18:12:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:54,308 INFO L225 Difference]: With dead ends: 2515 [2021-07-09 18:12:54,308 INFO L226 Difference]: Without dead ends: 2442 [2021-07-09 18:12:54,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 564.8ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:12:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-07-09 18:12:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2226. [2021-07-09 18:12:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.044943820224719) internal successors, (4550), 2225 states have internal predecessors, (4550), 0 states have call successors, (0), 0 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 18:12:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 4550 transitions. [2021-07-09 18:12:54,329 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 4550 transitions. Word has length 80 [2021-07-09 18:12:54,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:54,329 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 4550 transitions. [2021-07-09 18:12:54,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 18:12:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 4550 transitions. [2021-07-09 18:12:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-07-09 18:12:54,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:54,331 INFO L508 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:54,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:12:54,532 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:54,532 INFO L82 PathProgramCache]: Analyzing trace with hash -678443082, now seen corresponding path program 66 times [2021-07-09 18:12:54,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:54,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284854503] [2021-07-09 18:12:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:57,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:57,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284854503] [2021-07-09 18:12:57,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284854503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:57,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49377985] [2021-07-09 18:12:57,045 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:57,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-07-09 18:12:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2021-07-09 18:12:57,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:57,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:12:57,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:57,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:57,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:57,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:12:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:57,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49377985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:57,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:57,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-07-09 18:12:57,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633729537] [2021-07-09 18:12:57,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-07-09 18:12:57,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:57,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-07-09 18:12:57,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:12:57,307 INFO L87 Difference]: Start difference. First operand 2226 states and 4550 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 18:13:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:05,985 INFO L93 Difference]: Finished difference Result 4519 states and 8955 transitions. [2021-07-09 18:13:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:13:05,985 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-07-09 18:13:05,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:05,989 INFO L225 Difference]: With dead ends: 4519 [2021-07-09 18:13:05,989 INFO L226 Difference]: Without dead ends: 2895 [2021-07-09 18:13:05,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 9208.5ms TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2021-07-09 18:13:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-07-09 18:13:06,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 196. [2021-07-09 18:13:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 195 states have internal predecessors, (386), 0 states have call successors, (0), 0 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 18:13:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 386 transitions. [2021-07-09 18:13:06,002 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 386 transitions. Word has length 81 [2021-07-09 18:13:06,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:06,003 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 386 transitions. [2021-07-09 18:13:06,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 18:13:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 386 transitions. [2021-07-09 18:13:06,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-07-09 18:13:06,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:06,003 INFO L508 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:06,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:13:06,217 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:06,217 INFO L82 PathProgramCache]: Analyzing trace with hash 466171639, now seen corresponding path program 67 times [2021-07-09 18:13:06,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:06,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441237780] [2021-07-09 18:13:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:06,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:06,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441237780] [2021-07-09 18:13:06,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441237780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:06,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914338917] [2021-07-09 18:13:06,866 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-09 18:13:06,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:07,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914338917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:07,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:07,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 39 [2021-07-09 18:13:07,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211233755] [2021-07-09 18:13:07,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:13:07,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:07,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:13:07,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:13:07,109 INFO L87 Difference]: Start difference. First operand 196 states and 386 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 18:13:07,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:07,260 INFO L93 Difference]: Finished difference Result 2640 states and 5157 transitions. [2021-07-09 18:13:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:13:07,260 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-07-09 18:13:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:07,264 INFO L225 Difference]: With dead ends: 2640 [2021-07-09 18:13:07,264 INFO L226 Difference]: Without dead ends: 2565 [2021-07-09 18:13:07,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 602.2ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:13:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-07-09 18:13:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2343. [2021-07-09 18:13:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.04397950469684) internal successors, (4787), 2342 states have internal predecessors, (4787), 0 states have call successors, (0), 0 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 18:13:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4787 transitions. [2021-07-09 18:13:07,286 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4787 transitions. Word has length 82 [2021-07-09 18:13:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:07,286 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 4787 transitions. [2021-07-09 18:13:07,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 18:13:07,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4787 transitions. [2021-07-09 18:13:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-07-09 18:13:07,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:07,288 INFO L508 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:07,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:07,489 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:07,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:07,489 INFO L82 PathProgramCache]: Analyzing trace with hash 971852738, now seen corresponding path program 68 times [2021-07-09 18:13:07,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:07,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584896586] [2021-07-09 18:13:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:10,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:10,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584896586] [2021-07-09 18:13:10,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584896586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:10,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163299501] [2021-07-09 18:13:10,147 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:10,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:10,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:10,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 151 conjunts are in the unsatisfiable core [2021-07-09 18:13:10,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:10,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:13:10,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:10,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:10,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:10,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:13:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:10,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163299501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:10,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:10,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2021-07-09 18:13:10,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886787825] [2021-07-09 18:13:10,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-07-09 18:13:10,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:10,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-07-09 18:13:10,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:13:10,419 INFO L87 Difference]: Start difference. First operand 2343 states and 4787 transitions. Second operand has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 18:13:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:19,725 INFO L93 Difference]: Finished difference Result 4755 states and 9425 transitions. [2021-07-09 18:13:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:13:19,726 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-07-09 18:13:19,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:19,729 INFO L225 Difference]: With dead ends: 4755 [2021-07-09 18:13:19,729 INFO L226 Difference]: Without dead ends: 3049 [2021-07-09 18:13:19,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 9842.7ms TimeCoverageRelationStatistics Valid=3111, Invalid=19539, Unknown=0, NotChecked=0, Total=22650 [2021-07-09 18:13:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-07-09 18:13:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 201. [2021-07-09 18:13:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.98) internal successors, (396), 200 states have internal predecessors, (396), 0 states have call successors, (0), 0 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 18:13:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 396 transitions. [2021-07-09 18:13:19,745 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 396 transitions. Word has length 83 [2021-07-09 18:13:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:19,746 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 396 transitions. [2021-07-09 18:13:19,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 18:13:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 396 transitions. [2021-07-09 18:13:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-07-09 18:13:19,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:19,746 INFO L508 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:19,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:13:19,961 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash 85734507, now seen corresponding path program 69 times [2021-07-09 18:13:19,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:19,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993329850] [2021-07-09 18:13:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:20,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:20,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993329850] [2021-07-09 18:13:20,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993329850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:20,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028944046] [2021-07-09 18:13:20,628 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:20,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-07-09 18:13:20,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 76 conjunts are in the unsatisfiable core [2021-07-09 18:13:20,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:20,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028944046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:20,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:20,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 40 [2021-07-09 18:13:20,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467589535] [2021-07-09 18:13:20,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:13:20,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:20,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:13:20,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:13:20,899 INFO L87 Difference]: Start difference. First operand 201 states and 396 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:13:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:21,038 INFO L93 Difference]: Finished difference Result 2768 states and 5410 transitions. [2021-07-09 18:13:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:13:21,038 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-07-09 18:13:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:21,041 INFO L225 Difference]: With dead ends: 2768 [2021-07-09 18:13:21,041 INFO L226 Difference]: Without dead ends: 2691 [2021-07-09 18:13:21,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 620.5ms TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:13:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-07-09 18:13:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2463. [2021-07-09 18:13:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.0430544272948823) internal successors, (5030), 2462 states have internal predecessors, (5030), 0 states have call successors, (0), 0 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 18:13:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 5030 transitions. [2021-07-09 18:13:21,062 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 5030 transitions. Word has length 84 [2021-07-09 18:13:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:21,062 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 5030 transitions. [2021-07-09 18:13:21,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:13:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 5030 transitions. [2021-07-09 18:13:21,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-07-09 18:13:21,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:21,064 INFO L508 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:21,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:21,268 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:21,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:21,269 INFO L82 PathProgramCache]: Analyzing trace with hash 713966198, now seen corresponding path program 70 times [2021-07-09 18:13:21,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:21,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085236485] [2021-07-09 18:13:21,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:24,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:24,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085236485] [2021-07-09 18:13:24,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085236485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:24,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484367595] [2021-07-09 18:13:24,045 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:24,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:24,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:24,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 155 conjunts are in the unsatisfiable core [2021-07-09 18:13:24,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:24,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:13:24,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:24,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:24,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:24,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:13:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:24,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484367595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:24,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:24,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-07-09 18:13:24,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224078686] [2021-07-09 18:13:24,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-07-09 18:13:24,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:24,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-07-09 18:13:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:13:24,308 INFO L87 Difference]: Start difference. First operand 2463 states and 5030 transitions. Second operand has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 18:13:29,964 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-07-09 18:13:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:34,236 INFO L93 Difference]: Finished difference Result 4997 states and 9907 transitions. [2021-07-09 18:13:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:13:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-07-09 18:13:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:34,240 INFO L225 Difference]: With dead ends: 4997 [2021-07-09 18:13:34,240 INFO L226 Difference]: Without dead ends: 3207 [2021-07-09 18:13:34,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 10467.7ms TimeCoverageRelationStatistics Valid=3271, Invalid=20599, Unknown=0, NotChecked=0, Total=23870 [2021-07-09 18:13:34,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2021-07-09 18:13:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 206. [2021-07-09 18:13:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.9804878048780488) internal successors, (406), 205 states have internal predecessors, (406), 0 states have call successors, (0), 0 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 18:13:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 406 transitions. [2021-07-09 18:13:34,252 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 406 transitions. Word has length 85 [2021-07-09 18:13:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:34,252 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 406 transitions. [2021-07-09 18:13:34,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 18:13:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 406 transitions. [2021-07-09 18:13:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 18:13:34,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:34,253 INFO L508 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:34,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-09 18:13:34,453 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:34,454 INFO L82 PathProgramCache]: Analyzing trace with hash 681186359, now seen corresponding path program 71 times [2021-07-09 18:13:34,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:34,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916480634] [2021-07-09 18:13:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:35,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:35,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916480634] [2021-07-09 18:13:35,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916480634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:35,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222235230] [2021-07-09 18:13:35,151 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:35,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-07-09 18:13:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:35,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2021-07-09 18:13:35,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:35,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222235230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:35,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:35,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 41 [2021-07-09 18:13:35,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842529219] [2021-07-09 18:13:35,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 18:13:35,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:35,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 18:13:35,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:13:35,404 INFO L87 Difference]: Start difference. First operand 206 states and 406 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:13:35,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:35,551 INFO L93 Difference]: Finished difference Result 2899 states and 5669 transitions. [2021-07-09 18:13:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:13:35,551 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 18:13:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:35,554 INFO L225 Difference]: With dead ends: 2899 [2021-07-09 18:13:35,554 INFO L226 Difference]: Without dead ends: 2820 [2021-07-09 18:13:35,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 651.8ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:13:35,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-07-09 18:13:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2586. [2021-07-09 18:13:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 2.042166344294004) internal successors, (5279), 2585 states have internal predecessors, (5279), 0 states have call successors, (0), 0 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 18:13:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 5279 transitions. [2021-07-09 18:13:35,577 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 5279 transitions. Word has length 86 [2021-07-09 18:13:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:35,577 INFO L482 AbstractCegarLoop]: Abstraction has 2586 states and 5279 transitions. [2021-07-09 18:13:35,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:13:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 5279 transitions. [2021-07-09 18:13:35,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-07-09 18:13:35,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:35,579 INFO L508 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:35,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:35,780 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:35,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1178547326, now seen corresponding path program 72 times [2021-07-09 18:13:35,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:35,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871560835] [2021-07-09 18:13:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:38,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:38,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871560835] [2021-07-09 18:13:38,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871560835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:38,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614575762] [2021-07-09 18:13:38,658 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:38,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-07-09 18:13:38,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 84 conjunts are in the unsatisfiable core [2021-07-09 18:13:38,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:47,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:47,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:13:47,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:47,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-09 18:13:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 741 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:47,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614575762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:47,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:47,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 158 [2021-07-09 18:13:47,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184577015] [2021-07-09 18:13:47,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 159 states [2021-07-09 18:13:47,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:47,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-07-09 18:13:47,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3318, Invalid=21804, Unknown=0, NotChecked=0, Total=25122 [2021-07-09 18:13:47,177 INFO L87 Difference]: Start difference. First operand 2586 states and 5279 transitions. Second operand has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 18:13:51,061 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 101 [2021-07-09 18:13:51,324 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-07-09 18:13:51,583 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-07-09 18:13:51,854 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-07-09 18:13:52,222 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 117 [2021-07-09 18:13:52,513 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-07-09 18:13:52,810 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 125 [2021-07-09 18:13:53,120 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-07-09 18:13:53,439 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-07-09 18:13:53,750 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-07-09 18:13:54,081 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-07-09 18:13:54,427 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-07-09 18:13:54,775 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 149 [2021-07-09 18:13:55,113 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-07-09 18:13:55,469 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 152 [2021-07-09 18:13:55,820 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-07-09 18:13:56,182 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-07-09 18:13:56,452 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-07-09 18:13:56,703 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-07-09 18:13:56,951 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-09 18:13:57,393 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-07-09 18:13:57,607 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-07-09 18:13:58,026 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:13:58,248 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-07-09 18:13:58,472 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-09 18:13:58,691 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:13:59,535 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:14:00,394 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:18:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:11,602 INFO L93 Difference]: Finished difference Result 43429 states and 85946 transitions. [2021-07-09 18:18:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 940 states. [2021-07-09 18:18:11,603 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-07-09 18:18:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:11,665 INFO L225 Difference]: With dead ends: 43429 [2021-07-09 18:18:11,665 INFO L226 Difference]: Without dead ends: 35000 [2021-07-09 18:18:11,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1055 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431709 ImplicationChecksByTransitivity, 254133.2ms TimeCoverageRelationStatistics Valid=188064, Invalid=928128, Unknown=0, NotChecked=0, Total=1116192 [2021-07-09 18:18:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35000 states. [2021-07-09 18:18:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35000 to 2630. [2021-07-09 18:18:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 2.0422213769494104) internal successors, (5369), 2629 states have internal predecessors, (5369), 0 states have call successors, (0), 0 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 18:18:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 5369 transitions. [2021-07-09 18:18:11,938 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 5369 transitions. Word has length 87 [2021-07-09 18:18:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:11,938 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 5369 transitions. [2021-07-09 18:18:11,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 18:18:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 5369 transitions. [2021-07-09 18:18:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-07-09 18:18:11,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:11,941 INFO L508 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:12,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:12,141 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:12,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1645133110, now seen corresponding path program 73 times [2021-07-09 18:18:12,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:12,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987187407] [2021-07-09 18:18:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:15,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:15,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987187407] [2021-07-09 18:18:15,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987187407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:15,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256873238] [2021-07-09 18:18:15,288 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:15,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 163 conjunts are in the unsatisfiable core [2021-07-09 18:18:15,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:15,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:18:15,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:15,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:15,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:15,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:18:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:15,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256873238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:15,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:15,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2021-07-09 18:18:15,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852852297] [2021-07-09 18:18:15,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-07-09 18:18:15,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:15,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-07-09 18:18:15,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:18:15,528 INFO L87 Difference]: Start difference. First operand 2630 states and 5369 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:18:20,079 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-07-09 18:18:21,280 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-07-09 18:18:21,490 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-07-09 18:18:21,706 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-09 18:18:21,914 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 18:18:22,146 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-07-09 18:18:27,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:27,146 INFO L93 Difference]: Finished difference Result 5413 states and 10738 transitions. [2021-07-09 18:18:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:18:27,147 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-07-09 18:18:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:27,151 INFO L225 Difference]: With dead ends: 5413 [2021-07-09 18:18:27,151 INFO L226 Difference]: Without dead ends: 3533 [2021-07-09 18:18:27,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 12158.9ms TimeCoverageRelationStatistics Valid=3603, Invalid=22803, Unknown=0, NotChecked=0, Total=26406 [2021-07-09 18:18:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2021-07-09 18:18:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 216. [2021-07-09 18:18:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.9813953488372094) internal successors, (426), 215 states have internal predecessors, (426), 0 states have call successors, (0), 0 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 18:18:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 426 transitions. [2021-07-09 18:18:27,165 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 426 transitions. Word has length 89 [2021-07-09 18:18:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:27,165 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 426 transitions. [2021-07-09 18:18:27,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:18:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 426 transitions. [2021-07-09 18:18:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-07-09 18:18:27,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:27,166 INFO L508 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:27,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:27,367 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:27,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:27,367 INFO L82 PathProgramCache]: Analyzing trace with hash -517410441, now seen corresponding path program 74 times [2021-07-09 18:18:27,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:27,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105965568] [2021-07-09 18:18:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:28,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:28,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105965568] [2021-07-09 18:18:28,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105965568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:28,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152487966] [2021-07-09 18:18:28,114 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:28,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:28,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 82 conjunts are in the unsatisfiable core [2021-07-09 18:18:28,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:28,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152487966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:28,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:28,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 43 [2021-07-09 18:18:28,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109553551] [2021-07-09 18:18:28,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:18:28,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:28,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:18:28,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:18:28,392 INFO L87 Difference]: Start difference. First operand 216 states and 426 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 18:18:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:28,566 INFO L93 Difference]: Finished difference Result 3170 states and 6205 transitions. [2021-07-09 18:18:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:18:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-07-09 18:18:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:28,570 INFO L225 Difference]: With dead ends: 3170 [2021-07-09 18:18:28,570 INFO L226 Difference]: Without dead ends: 3087 [2021-07-09 18:18:28,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 697.2ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:18:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2021-07-09 18:18:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 2841. [2021-07-09 18:18:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2840 states have (on average 2.040492957746479) internal successors, (5795), 2840 states have internal predecessors, (5795), 0 states have call successors, (0), 0 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 18:18:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 5795 transitions. [2021-07-09 18:18:28,601 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 5795 transitions. Word has length 90 [2021-07-09 18:18:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:28,601 INFO L482 AbstractCegarLoop]: Abstraction has 2841 states and 5795 transitions. [2021-07-09 18:18:28,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 18:18:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 5795 transitions. [2021-07-09 18:18:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-07-09 18:18:28,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:28,604 INFO L508 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:28,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-09 18:18:28,817 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:28,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:28,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2042819774, now seen corresponding path program 75 times [2021-07-09 18:18:28,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:28,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560009907] [2021-07-09 18:18:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:32,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:32,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560009907] [2021-07-09 18:18:32,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560009907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:32,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059482172] [2021-07-09 18:18:32,085 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:32,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-07-09 18:18:32,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:32,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 167 conjunts are in the unsatisfiable core [2021-07-09 18:18:32,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:32,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:18:32,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:32,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:32,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:32,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:18:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:32,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059482172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:32,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:32,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2021-07-09 18:18:32,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709443261] [2021-07-09 18:18:32,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-07-09 18:18:32,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:32,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-07-09 18:18:32,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:18:32,353 INFO L87 Difference]: Start difference. First operand 2841 states and 5795 transitions. Second operand has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 18:18:38,191 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-07-09 18:18:38,404 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-07-09 18:18:38,622 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-09 18:18:38,842 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-07-09 18:18:39,057 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-07-09 18:18:39,294 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 18:18:39,460 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-07-09 18:18:39,688 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-07-09 18:18:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:44,572 INFO L93 Difference]: Finished difference Result 5759 states and 11425 transitions. [2021-07-09 18:18:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-09 18:18:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-07-09 18:18:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:44,577 INFO L225 Difference]: With dead ends: 5759 [2021-07-09 18:18:44,577 INFO L226 Difference]: Without dead ends: 3705 [2021-07-09 18:18:44,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 12708.3ms TimeCoverageRelationStatistics Valid=3775, Invalid=23947, Unknown=0, NotChecked=0, Total=27722 [2021-07-09 18:18:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-07-09 18:18:44,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 221. [2021-07-09 18:18:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.981818181818182) internal successors, (436), 220 states have internal predecessors, (436), 0 states have call successors, (0), 0 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 18:18:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 436 transitions. [2021-07-09 18:18:44,591 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 436 transitions. Word has length 91 [2021-07-09 18:18:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:44,591 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 436 transitions. [2021-07-09 18:18:44,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 18:18:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 436 transitions. [2021-07-09 18:18:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-07-09 18:18:44,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:44,591 INFO L508 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:44,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:44,792 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:44,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1120167147, now seen corresponding path program 76 times [2021-07-09 18:18:44,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:44,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030889706] [2021-07-09 18:18:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:45,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:45,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030889706] [2021-07-09 18:18:45,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030889706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:45,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44662726] [2021-07-09 18:18:45,646 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:45,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:45,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:45,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 84 conjunts are in the unsatisfiable core [2021-07-09 18:18:45,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:45,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44662726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:45,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:45,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 44 [2021-07-09 18:18:45,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113821509] [2021-07-09 18:18:45,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:18:45,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:45,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:18:45,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:18:45,900 INFO L87 Difference]: Start difference. First operand 221 states and 436 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 18:18:46,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:46,119 INFO L93 Difference]: Finished difference Result 3310 states and 6482 transitions. [2021-07-09 18:18:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:18:46,120 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-07-09 18:18:46,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:46,125 INFO L225 Difference]: With dead ends: 3310 [2021-07-09 18:18:46,125 INFO L226 Difference]: Without dead ends: 3225 [2021-07-09 18:18:46,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 803.1ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:18:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-07-09 18:18:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2973. [2021-07-09 18:18:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2972 states have (on average 2.0397039030955586) internal successors, (6062), 2972 states have internal predecessors, (6062), 0 states have call successors, (0), 0 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 18:18:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 6062 transitions. [2021-07-09 18:18:46,161 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 6062 transitions. Word has length 92 [2021-07-09 18:18:46,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:46,161 INFO L482 AbstractCegarLoop]: Abstraction has 2973 states and 6062 transitions. [2021-07-09 18:18:46,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 18:18:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 6062 transitions. [2021-07-09 18:18:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-07-09 18:18:46,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:46,165 INFO L508 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:46,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:46,381 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash -214353930, now seen corresponding path program 77 times [2021-07-09 18:18:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:46,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372885755] [2021-07-09 18:18:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:49,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:49,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372885755] [2021-07-09 18:18:49,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372885755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:49,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850145605] [2021-07-09 18:18:49,757 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:49,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-07-09 18:18:49,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:49,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 171 conjunts are in the unsatisfiable core [2021-07-09 18:18:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:50,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:18:50,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:50,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:50,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:50,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:18:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:50,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850145605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:50,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:50,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2021-07-09 18:18:50,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148080190] [2021-07-09 18:18:50,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-07-09 18:18:50,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:50,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-07-09 18:18:50,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:18:50,043 INFO L87 Difference]: Start difference. First operand 2973 states and 6062 transitions. Second operand has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 18:18:55,837 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-07-09 18:18:56,089 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-07-09 18:18:56,309 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-09 18:18:56,535 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-07-09 18:18:56,761 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-07-09 18:18:56,983 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-07-09 18:18:57,231 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-07-09 18:18:57,399 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 18:18:57,565 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-07-09 18:19:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:02,723 INFO L93 Difference]: Finished difference Result 6025 states and 11955 transitions. [2021-07-09 18:19:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 18:19:02,723 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-07-09 18:19:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:02,728 INFO L225 Difference]: With dead ends: 6025 [2021-07-09 18:19:02,728 INFO L226 Difference]: Without dead ends: 3879 [2021-07-09 18:19:02,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 13268.0ms TimeCoverageRelationStatistics Valid=3951, Invalid=25119, Unknown=0, NotChecked=0, Total=29070 [2021-07-09 18:19:02,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-07-09 18:19:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 226. [2021-07-09 18:19:02,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 225 states have internal predecessors, (446), 0 states have call successors, (0), 0 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 18:19:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 446 transitions. [2021-07-09 18:19:02,741 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 446 transitions. Word has length 93 [2021-07-09 18:19:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:02,741 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 446 transitions. [2021-07-09 18:19:02,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 18:19:02,741 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 446 transitions. [2021-07-09 18:19:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-07-09 18:19:02,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:02,741 INFO L508 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:02,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 18:19:02,942 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:02,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:02,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1968033463, now seen corresponding path program 78 times [2021-07-09 18:19:02,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:02,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194615687] [2021-07-09 18:19:02,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:03,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:03,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194615687] [2021-07-09 18:19:03,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194615687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:03,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428155485] [2021-07-09 18:19:03,768 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:03,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-07-09 18:19:03,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:03,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 86 conjunts are in the unsatisfiable core [2021-07-09 18:19:03,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:04,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428155485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:04,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:04,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 45 [2021-07-09 18:19:04,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622541599] [2021-07-09 18:19:04,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:19:04,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:04,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:19:04,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:19:04,045 INFO L87 Difference]: Start difference. First operand 226 states and 446 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:19:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:04,228 INFO L93 Difference]: Finished difference Result 3453 states and 6765 transitions. [2021-07-09 18:19:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:19:04,228 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-07-09 18:19:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:04,232 INFO L225 Difference]: With dead ends: 3453 [2021-07-09 18:19:04,232 INFO L226 Difference]: Without dead ends: 3366 [2021-07-09 18:19:04,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 776.7ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:19:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2021-07-09 18:19:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3108. [2021-07-09 18:19:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 2.0389443192790475) internal successors, (6335), 3107 states have internal predecessors, (6335), 0 states have call successors, (0), 0 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 18:19:04,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 6335 transitions. [2021-07-09 18:19:04,263 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 6335 transitions. Word has length 94 [2021-07-09 18:19:04,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:04,263 INFO L482 AbstractCegarLoop]: Abstraction has 3108 states and 6335 transitions. [2021-07-09 18:19:04,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:19:04,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 6335 transitions. [2021-07-09 18:19:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-07-09 18:19:04,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:04,265 INFO L508 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:04,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 18:19:04,466 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:04,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:04,466 INFO L82 PathProgramCache]: Analyzing trace with hash -606467326, now seen corresponding path program 79 times [2021-07-09 18:19:04,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:04,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184570354] [2021-07-09 18:19:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:07,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:07,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184570354] [2021-07-09 18:19:07,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184570354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:07,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424938552] [2021-07-09 18:19:07,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:08,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 175 conjunts are in the unsatisfiable core [2021-07-09 18:19:08,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:08,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:19:08,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:08,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:08,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:08,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:19:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:08,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424938552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:08,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:08,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2021-07-09 18:19:08,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630674959] [2021-07-09 18:19:08,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-07-09 18:19:08,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:08,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-07-09 18:19:08,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:19:08,218 INFO L87 Difference]: Start difference. First operand 3108 states and 6335 transitions. Second operand has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 18:19:14,127 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-07-09 18:19:14,348 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-07-09 18:19:14,575 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-09 18:19:14,804 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-07-09 18:19:15,035 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-07-09 18:19:15,274 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-07-09 18:19:15,514 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-07-09 18:19:15,767 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-07-09 18:19:15,941 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-07-09 18:19:16,114 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 18:19:16,285 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-07-09 18:19:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:21,591 INFO L93 Difference]: Finished difference Result 6297 states and 12497 transitions. [2021-07-09 18:19:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-09 18:19:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-07-09 18:19:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:21,595 INFO L225 Difference]: With dead ends: 6297 [2021-07-09 18:19:21,595 INFO L226 Difference]: Without dead ends: 4057 [2021-07-09 18:19:21,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 13953.3ms TimeCoverageRelationStatistics Valid=4131, Invalid=26319, Unknown=0, NotChecked=0, Total=30450 [2021-07-09 18:19:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-07-09 18:19:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 231. [2021-07-09 18:19:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.982608695652174) internal successors, (456), 230 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 18:19:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 456 transitions. [2021-07-09 18:19:21,608 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 456 transitions. Word has length 95 [2021-07-09 18:19:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:21,608 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 456 transitions. [2021-07-09 18:19:21,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 18:19:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 456 transitions. [2021-07-09 18:19:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 18:19:21,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:21,609 INFO L508 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:21,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:21,809 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:21,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:21,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1597547221, now seen corresponding path program 80 times [2021-07-09 18:19:21,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:21,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313158337] [2021-07-09 18:19:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:22,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:22,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313158337] [2021-07-09 18:19:22,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313158337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:22,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152632961] [2021-07-09 18:19:22,677 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:22,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:22,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:22,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 88 conjunts are in the unsatisfiable core [2021-07-09 18:19:22,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:22,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152632961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:22,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:22,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 46 [2021-07-09 18:19:22,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494971817] [2021-07-09 18:19:22,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:19:22,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:19:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:19:22,938 INFO L87 Difference]: Start difference. First operand 231 states and 456 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 18:19:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:23,124 INFO L93 Difference]: Finished difference Result 3599 states and 7054 transitions. [2021-07-09 18:19:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:19:23,125 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 18:19:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:23,129 INFO L225 Difference]: With dead ends: 3599 [2021-07-09 18:19:23,129 INFO L226 Difference]: Without dead ends: 3510 [2021-07-09 18:19:23,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 813.5ms TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:19:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2021-07-09 18:19:23,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 3246. [2021-07-09 18:19:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3246 states, 3245 states have (on average 2.0382126348228042) internal successors, (6614), 3245 states have internal predecessors, (6614), 0 states have call successors, (0), 0 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 18:19:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 6614 transitions. [2021-07-09 18:19:23,161 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 6614 transitions. Word has length 96 [2021-07-09 18:19:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:23,162 INFO L482 AbstractCegarLoop]: Abstraction has 3246 states and 6614 transitions. [2021-07-09 18:19:23,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 18:19:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 6614 transitions. [2021-07-09 18:19:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-07-09 18:19:23,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:23,164 INFO L508 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:23,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:23,365 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:23,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1791642954, now seen corresponding path program 81 times [2021-07-09 18:19:23,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:23,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102089034] [2021-07-09 18:19:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:27,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:27,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102089034] [2021-07-09 18:19:27,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102089034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:27,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727518364] [2021-07-09 18:19:27,028 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:27,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-07-09 18:19:27,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:27,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 94 conjunts are in the unsatisfiable core [2021-07-09 18:19:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:37,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:37,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:19:37,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:37,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:37,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:37,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-09 18:19:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 946 proven. 1034 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:37,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727518364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:37,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:37,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 178 [2021-07-09 18:19:37,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685160514] [2021-07-09 18:19:37,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 179 states [2021-07-09 18:19:37,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-07-09 18:19:37,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4183, Invalid=27679, Unknown=0, NotChecked=0, Total=31862 [2021-07-09 18:19:37,850 INFO L87 Difference]: Start difference. First operand 3246 states and 6614 transitions. Second operand has 179 states, 179 states have (on average 1.0558659217877095) internal successors, (189), 178 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 18:19:42,062 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 101 [2021-07-09 18:19:42,323 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-07-09 18:19:42,592 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-07-09 18:19:42,870 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-07-09 18:19:43,156 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-07-09 18:19:43,467 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-07-09 18:19:43,768 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2021-07-09 18:19:44,087 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-07-09 18:19:44,417 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-07-09 18:19:44,757 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-07-09 18:19:45,109 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-07-09 18:19:45,470 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-07-09 18:19:45,834 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 144 [2021-07-09 18:19:46,204 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-07-09 18:19:46,604 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 157 [2021-07-09 18:19:47,005 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-07-09 18:19:47,431 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-07-09 18:19:47,867 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 164 [2021-07-09 18:19:48,321 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 173 [2021-07-09 18:19:48,801 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 177 [2021-07-09 18:19:49,266 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 176 [2021-07-09 18:19:49,760 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 180 [2021-07-09 18:19:50,130 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2021-07-09 18:19:50,451 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-07-09 18:19:50,795 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2021-07-09 18:19:51,067 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-07-09 18:19:51,353 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2021-07-09 18:19:51,615 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2021-07-09 18:19:51,864 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-07-09 18:19:52,135 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-07-09 18:19:52,404 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-07-09 18:19:52,650 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-07-09 18:19:52,925 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-07-09 18:19:53,188 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-07-09 18:19:53,454 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-07-09 18:19:53,700 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 18:19:53,977 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-07-09 18:19:54,247 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-07-09 18:19:54,523 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-07-09 18:19:54,765 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-07-09 18:19:55,040 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-07-09 18:19:55,304 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-07-09 18:19:55,558 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-07-09 18:19:55,813 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-09 18:19:56,336 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-07-09 18:19:56,598 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-07-09 18:19:56,845 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-07-09 18:19:57,092 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-07-09 18:19:57,619 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-07-09 18:19:57,888 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-07-09 18:19:58,161 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-07-09 18:19:58,402 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:19:58,642 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-07-09 18:19:59,165 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-07-09 18:19:59,429 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-07-09 18:19:59,679 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:19:59,912 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:20:00,679 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-07-09 18:20:00,954 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-07-09 18:20:01,214 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:20:01,478 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:20:01,709 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-07-09 18:20:02,464 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-07-09 18:20:02,733 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:20:02,985 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:20:04,211 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-07-09 18:20:04,498 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:20:04,766 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:20:05,034 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-07-09 18:20:06,245 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:20:06,523 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:20:06,794 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-07-09 18:20:08,229 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:20:08,539 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:20:10,467 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:20:12,678 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:20:15,467 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-07-09 18:20:18,949 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-09 18:20:25,846 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-09 18:21:43,897 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 102 Received shutdown request... [2021-07-09 18:22:00,880 WARN L222 SmtUtils]: Removed 23 from assertion stack [2021-07-09 18:22:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2021-07-09 18:22:01,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:01,081 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:22:01,082 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:22:01,084 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:22:01,084 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:22:01 BasicIcfg [2021-07-09 18:22:01,084 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:22:01,085 INFO L168 Benchmark]: Toolchain (without parser) took 759355.37 ms. Allocated memory was 182.5 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 161.9 MB in the beginning and 930.0 MB in the end (delta: -768.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-07-09 18:22:01,085 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 182.5 MB. Free memory is still 162.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:22:01,085 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.17 ms. Allocated memory is still 182.5 MB. Free memory was 161.9 MB in the beginning and 160.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:22:01,085 INFO L168 Benchmark]: Boogie Preprocessor took 15.28 ms. Allocated memory is still 182.5 MB. Free memory was 160.4 MB in the beginning and 159.5 MB in the end (delta: 872.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:22:01,085 INFO L168 Benchmark]: RCFGBuilder took 223.15 ms. Allocated memory is still 182.5 MB. Free memory was 159.3 MB in the beginning and 148.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:22:01,085 INFO L168 Benchmark]: TraceAbstraction took 759076.21 ms. Allocated memory was 182.5 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 148.1 MB in the beginning and 930.0 MB in the end (delta: -781.9 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-07-09 18:22:01,086 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 0.10 ms. Allocated memory is still 182.5 MB. Free memory is still 162.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.17 ms. Allocated memory is still 182.5 MB. Free memory was 161.9 MB in the beginning and 160.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.28 ms. Allocated memory is still 182.5 MB. Free memory was 160.4 MB in the beginning and 159.5 MB in the end (delta: 872.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 223.15 ms. Allocated memory is still 182.5 MB. Free memory was 159.3 MB in the beginning and 148.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 759076.21 ms. Allocated memory was 182.5 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 148.1 MB in the beginning and 930.0 MB in the end (delta: -781.9 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3246states) and FLOYD_HOARE automaton (currently 576 states, 179 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 94 for 8ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 758997.8ms, OverallIterations: 83, TraceHistogramMax: 44, EmptinessCheckTime: 114.0ms, AutomataDifference: 626805.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9393 SDtfs, 109817 SDslu, 316238 SDs, 0 SdLazy, 91993 SolverSat, 32783 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44892.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12012 GetRequests, 4909 SyntacticMatches, 72 SemanticMatches, 7030 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743988 ImplicationChecksByTransitivity, 641110.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3246occurred in iteration=82, InterpolantAutomatonStates: 4418, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1171.6ms AutomataMinimizationTime, 82 MinimizatonAttempts, 99360 StatesRemovedByMinimization, 79 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 562.9ms SsaConstructionTime, 3020.8ms SatisfiabilityAnalysisTime, 108140.7ms InterpolantComputationTime, 8911 NumberOfCodeBlocks, 8911 NumberOfCodeBlocksAsserted, 659 NumberOfCheckSat, 8747 ConstructedInterpolants, 154 QuantifiedInterpolants, 56579 SizeOfPredicates, 51 NumberOfNonLiveVariables, 18527 ConjunctsInSsa, 5607 ConjunctsInUnsatCore, 164 InterpolantComputations, 2 PerfectInterpolantSequences, 29773/114327 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown