/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:44:30,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:44:30,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:44:30,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 13:44:30,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 13:44:30,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 13:44:30,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 13:44:30,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 13:44:30,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 13:44:30,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 13:44:30,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 13:44:30,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 13:44:30,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 13:44:30,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 13:44:30,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 13:44:30,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 13:44:30,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 13:44:30,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 13:44:30,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 13:44:30,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 13:44:30,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 13:44:30,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 13:44:30,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 13:44:30,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 13:44:30,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 13:44:30,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 13:44:30,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 13:44:30,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 13:44:30,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 13:44:30,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 13:44:30,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 13:44:30,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 13:44:30,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 13:44:30,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 13:44:30,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 13:44:30,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 13:44:30,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 13:44:30,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 13:44:30,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 13:44:30,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 13:44:30,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 13:44:30,277 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-Separate.epf [2021-06-05 13:44:30,303 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:44:30,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:44:30,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:44:30,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:44:30,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:44:30,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:44:30,305 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:44:30,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:44:30,306 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:44:30,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:44:30,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:44:30,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:44:30,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:44:30,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:44:30,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:44:30,307 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:44:30,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:44:30,307 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:44:30,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:44:30,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:44:30,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:44:30,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:44:30,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:44:30,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:44:30,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:44:30,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:44:30,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:44:30,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:44:30,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:44:30,308 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:44:30,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:44:30,308 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:44:30,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:44:30,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:44:30,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:44:30,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:44:30,537 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:44:30,538 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:44:30,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl [2021-06-05 13:44:30,539 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl' [2021-06-05 13:44:30,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:44:30,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:44:30,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:44:30,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:44:30,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:44:30,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:30" (1/1) ... [2021-06-05 13:44:30,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:30" (1/1) ... [2021-06-05 13:44:30,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:44:30,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:44:30,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:44:30,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:44:30,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:30" (1/1) ... [2021-06-05 13:44:30,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:30" (1/1) ... [2021-06-05 13:44:30,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:30" (1/1) ... [2021-06-05 13:44:30,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:30" (1/1) ... [2021-06-05 13:44:30,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:30" (1/1) ... [2021-06-05 13:44:30,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:30" (1/1) ... [2021-06-05 13:44:30,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:30" (1/1) ... [2021-06-05 13:44:30,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:44:30,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:44:30,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:44:30,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:44:30,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:30" (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 [2021-06-05 13:44:30,643 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:44:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:44:30,643 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:44:30,643 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:44:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:44:30,644 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:44:30,644 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:44:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:44:30,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:44:30,644 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 13:44:30,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:44:30,790 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 13:44:30,791 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:44:30 BoogieIcfgContainer [2021-06-05 13:44:30,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:44:30,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:44:30,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:44:30,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:44:30,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:30" (1/2) ... [2021-06-05 13:44:30,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c67542 and model type mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:44:30, skipping insertion in model container [2021-06-05 13:44:30,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:44:30" (2/2) ... [2021-06-05 13:44:30,796 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.bpl [2021-06-05 13:44:30,799 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:44:30,799 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:44:30,799 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:44:30,800 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:44:30,837 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 13:44:30,851 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:44:30,873 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:44:30,874 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:44:30,874 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:44:30,874 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:44:30,874 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:44:30,874 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:44:30,874 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:44:30,874 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:44:30,882 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-06-05 13:44:30,890 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 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) [2021-06-05 13:44:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 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) [2021-06-05 13:44:30,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:44:30,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:30,907 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:30,907 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:30,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:30,912 INFO L82 PathProgramCache]: Analyzing trace with hash -538755822, now seen corresponding path program 1 times [2021-06-05 13:44:30,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:30,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107925753] [2021-06-05 13:44:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:31,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:31,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107925753] [2021-06-05 13:44:31,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107925753] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:44:31,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:44:31,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:44:31,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626940818] [2021-06-05 13:44:31,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:44:31,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:31,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:44:31,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:44:31,058 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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) [2021-06-05 13:44:31,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:31,072 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-06-05 13:44:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:44:31,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 [2021-06-05 13:44:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:31,078 INFO L225 Difference]: With dead ends: 54 [2021-06-05 13:44:31,078 INFO L226 Difference]: Without dead ends: 47 [2021-06-05 13:44:31,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:44:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-05 13:44:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-05 13:44:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 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) [2021-06-05 13:44:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-05 13:44:31,098 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-06-05 13:44:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:31,099 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-05 13:44:31,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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) [2021-06-05 13:44:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-05 13:44:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:44:31,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:31,099 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:31,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:44:31,100 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:31,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1263691540, now seen corresponding path program 1 times [2021-06-05 13:44:31,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:31,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625456636] [2021-06-05 13:44:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:31,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:31,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625456636] [2021-06-05 13:44:31,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625456636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:31,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960676671] [2021-06-05 13:44:31,222 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 [2021-06-05 13:44:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:31,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:31,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:31,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960676671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:31,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:31,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 13:44:31,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557596614] [2021-06-05 13:44:31,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:44:31,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:31,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:44:31,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:44:31,415 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-06-05 13:44:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:31,496 INFO L93 Difference]: Finished difference Result 65 states and 125 transitions. [2021-06-05 13:44:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:44:31,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 13 [2021-06-05 13:44:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:31,497 INFO L225 Difference]: With dead ends: 65 [2021-06-05 13:44:31,497 INFO L226 Difference]: Without dead ends: 47 [2021-06-05 13:44:31,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-05 13:44:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-06-05 13:44:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-06-05 13:44:31,502 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-06-05 13:44:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:31,503 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-06-05 13:44:31,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-06-05 13:44:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-06-05 13:44:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:44:31,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:31,503 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:31,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 13:44:31,717 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1006944620, now seen corresponding path program 1 times [2021-06-05 13:44:31,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:31,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959093649] [2021-06-05 13:44:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:31,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:31,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959093649] [2021-06-05 13:44:31,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959093649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:31,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648785666] [2021-06-05 13:44:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:31,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:31,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:31,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648785666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:31,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:31,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 13:44:31,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838403247] [2021-06-05 13:44:31,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:44:31,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:31,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:44:31,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:44:31,884 INFO L87 Difference]: Start difference. First operand 36 states and 68 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) [2021-06-05 13:44:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:31,917 INFO L93 Difference]: Finished difference Result 52 states and 94 transitions. [2021-06-05 13:44:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:44:31,918 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 13 [2021-06-05 13:44:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:31,920 INFO L225 Difference]: With dead ends: 52 [2021-06-05 13:44:31,920 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 13:44:31,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:44:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 13:44:31,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-06-05 13:44:31,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 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) [2021-06-05 13:44:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-05 13:44:31,930 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 13 [2021-06-05 13:44:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:31,930 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-05 13:44:31,930 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) [2021-06-05 13:44:31,930 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-05 13:44:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:44:31,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:31,931 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:32,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:32,131 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:32,132 INFO L82 PathProgramCache]: Analyzing trace with hash 689628820, now seen corresponding path program 2 times [2021-06-05 13:44:32,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:32,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996365175] [2021-06-05 13:44:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:32,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:32,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996365175] [2021-06-05 13:44:32,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996365175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:32,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546447238] [2021-06-05 13:44:32,242 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 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 [2021-06-05 13:44:32,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:32,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:32,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:32,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:32,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546447238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:32,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:32,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 13:44:32,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109292274] [2021-06-05 13:44:32,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:44:32,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:32,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:44:32,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:44:32,332 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2021-06-05 13:44:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:32,406 INFO L93 Difference]: Finished difference Result 64 states and 122 transitions. [2021-06-05 13:44:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:44:32,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 13 [2021-06-05 13:44:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:32,407 INFO L225 Difference]: With dead ends: 64 [2021-06-05 13:44:32,407 INFO L226 Difference]: Without dead ends: 53 [2021-06-05 13:44:32,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-06-05 13:44:32,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-06-05 13:44:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 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) [2021-06-05 13:44:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 89 transitions. [2021-06-05 13:44:32,410 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 89 transitions. Word has length 13 [2021-06-05 13:44:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:32,410 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 89 transitions. [2021-06-05 13:44:32,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2021-06-05 13:44:32,410 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 89 transitions. [2021-06-05 13:44:32,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:32,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:32,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:32,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:32,629 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:32,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1751181162, now seen corresponding path program 2 times [2021-06-05 13:44:32,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:32,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269602975] [2021-06-05 13:44:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:32,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:32,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269602975] [2021-06-05 13:44:32,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269602975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:32,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158223731] [2021-06-05 13:44:32,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:32,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:32,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:32,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:44:32,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:32,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158223731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:32,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:32,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:44:32,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672231732] [2021-06-05 13:44:32,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:32,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:32,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:32,849 INFO L87 Difference]: Start difference. First operand 47 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-06-05 13:44:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:32,985 INFO L93 Difference]: Finished difference Result 73 states and 140 transitions. [2021-06-05 13:44:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:44:32,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 [2021-06-05 13:44:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:32,987 INFO L225 Difference]: With dead ends: 73 [2021-06-05 13:44:32,987 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 13:44:32,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:32,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 13:44:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-06-05 13:44:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 48 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2021-06-05 13:44:32,996 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 15 [2021-06-05 13:44:32,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:32,997 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2021-06-05 13:44:32,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-06-05 13:44:32,997 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2021-06-05 13:44:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:32,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:32,997 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:33,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:33,198 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:33,198 INFO L82 PathProgramCache]: Analyzing trace with hash 273149974, now seen corresponding path program 1 times [2021-06-05 13:44:33,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:33,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770050739] [2021-06-05 13:44:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:33,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:33,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770050739] [2021-06-05 13:44:33,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770050739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:33,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022542059] [2021-06-05 13:44:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:33,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:33,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:33,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022542059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:33,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:33,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:44:33,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203875345] [2021-06-05 13:44:33,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:44:33,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:33,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:44:33,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:33,533 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 13:44:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:33,664 INFO L93 Difference]: Finished difference Result 69 states and 126 transitions. [2021-06-05 13:44:33,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:33,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-06-05 13:44:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:33,665 INFO L225 Difference]: With dead ends: 69 [2021-06-05 13:44:33,665 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 13:44:33,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 13:44:33,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-06-05 13:44:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 100 transitions. [2021-06-05 13:44:33,667 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 100 transitions. Word has length 15 [2021-06-05 13:44:33,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:33,667 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 100 transitions. [2021-06-05 13:44:33,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 13:44:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 100 transitions. [2021-06-05 13:44:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:33,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:33,668 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:33,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 13:44:33,869 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash -109570414, now seen corresponding path program 2 times [2021-06-05 13:44:33,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:33,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792914552] [2021-06-05 13:44:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:33,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:33,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792914552] [2021-06-05 13:44:33,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792914552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:33,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047402469] [2021-06-05 13:44:33,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:33,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:33,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:33,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:34,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047402469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:34,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:34,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:44:34,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367819261] [2021-06-05 13:44:34,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:44:34,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:34,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:44:34,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:34,134 INFO L87 Difference]: Start difference. First operand 53 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 13:44:34,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:34,247 INFO L93 Difference]: Finished difference Result 73 states and 134 transitions. [2021-06-05 13:44:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:34,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-06-05 13:44:34,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:34,249 INFO L225 Difference]: With dead ends: 73 [2021-06-05 13:44:34,249 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 13:44:34,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:34,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 13:44:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-06-05 13:44:34,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 103 transitions. [2021-06-05 13:44:34,254 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 103 transitions. Word has length 15 [2021-06-05 13:44:34,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:34,254 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 103 transitions. [2021-06-05 13:44:34,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 13:44:34,254 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 103 transitions. [2021-06-05 13:44:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:34,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:34,255 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:34,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:34,475 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1969723414, now seen corresponding path program 3 times [2021-06-05 13:44:34,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:34,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292278966] [2021-06-05 13:44:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:34,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:34,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292278966] [2021-06-05 13:44:34,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292278966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:34,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772055591] [2021-06-05 13:44:34,550 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 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 [2021-06-05 13:44:34,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:44:34,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:34,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:34,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772055591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:34,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:34,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:44:34,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281791816] [2021-06-05 13:44:34,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:44:34,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:34,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:44:34,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:34,766 INFO L87 Difference]: Start difference. First operand 54 states and 103 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 13:44:34,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:34,957 INFO L93 Difference]: Finished difference Result 94 states and 172 transitions. [2021-06-05 13:44:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:34,958 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-06-05 13:44:34,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:34,959 INFO L225 Difference]: With dead ends: 94 [2021-06-05 13:44:34,959 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 13:44:34,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 13:44:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2021-06-05 13:44:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-06-05 13:44:34,966 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-06-05 13:44:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:34,967 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-06-05 13:44:34,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 13:44:34,967 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-06-05 13:44:34,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:34,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:34,971 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:35,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:35,185 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:35,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1985184210, now seen corresponding path program 4 times [2021-06-05 13:44:35,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:35,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011507051] [2021-06-05 13:44:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:35,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:35,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011507051] [2021-06-05 13:44:35,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011507051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:35,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966711064] [2021-06-05 13:44:35,260 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 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 [2021-06-05 13:44:35,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:35,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:35,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:35,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:35,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966711064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:35,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:35,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:44:35,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234919405] [2021-06-05 13:44:35,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:44:35,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:35,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:44:35,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:35,463 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 13:44:35,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:35,599 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-06-05 13:44:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:35,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-06-05 13:44:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:35,600 INFO L225 Difference]: With dead ends: 81 [2021-06-05 13:44:35,600 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 13:44:35,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 13:44:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2021-06-05 13:44:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-06-05 13:44:35,612 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-06-05 13:44:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:35,612 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-06-05 13:44:35,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 13:44:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-06-05 13:44:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:35,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:35,613 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:35,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-06-05 13:44:35,825 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:35,825 INFO L82 PathProgramCache]: Analyzing trace with hash 903122118, now seen corresponding path program 5 times [2021-06-05 13:44:35,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:35,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723026180] [2021-06-05 13:44:35,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:35,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:35,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723026180] [2021-06-05 13:44:35,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723026180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:35,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828678431] [2021-06-05 13:44:35,932 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 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 [2021-06-05 13:44:35,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:35,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:35,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:35,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:36,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828678431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:36,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:36,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:36,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61761342] [2021-06-05 13:44:36,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:36,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:36,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:36,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:36,061 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:36,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:36,166 INFO L93 Difference]: Finished difference Result 72 states and 135 transitions. [2021-06-05 13:44:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:36,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:36,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:36,167 INFO L225 Difference]: With dead ends: 72 [2021-06-05 13:44:36,167 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 13:44:36,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 13:44:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-06-05 13:44:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-06-05 13:44:36,169 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-06-05 13:44:36,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:36,169 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-06-05 13:44:36,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-06-05 13:44:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:36,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:36,170 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:36,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:36,370 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:36,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1312551350, now seen corresponding path program 6 times [2021-06-05 13:44:36,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:36,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514484618] [2021-06-05 13:44:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:36,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514484618] [2021-06-05 13:44:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514484618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695919689] [2021-06-05 13:44:36,441 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 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 [2021-06-05 13:44:36,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:44:36,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:36,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:36,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:36,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695919689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:36,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:36,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:36,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798950561] [2021-06-05 13:44:36,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:36,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:36,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:36,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:36,569 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:36,691 INFO L93 Difference]: Finished difference Result 95 states and 176 transitions. [2021-06-05 13:44:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:36,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:36,692 INFO L225 Difference]: With dead ends: 95 [2021-06-05 13:44:36,692 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 13:44:36,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 13:44:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-06-05 13:44:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 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) [2021-06-05 13:44:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 13:44:36,694 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 13:44:36,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:36,695 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 13:44:36,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 13:44:36,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:36,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:36,696 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:36,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:36,909 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:36,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:36,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1297090554, now seen corresponding path program 7 times [2021-06-05 13:44:36,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:36,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194748036] [2021-06-05 13:44:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:36,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:36,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194748036] [2021-06-05 13:44:36,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194748036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:36,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249218986] [2021-06-05 13:44:36,976 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:44:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:37,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:37,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:37,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249218986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:37,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:37,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:37,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359576390] [2021-06-05 13:44:37,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:37,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:37,102 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:37,213 INFO L93 Difference]: Finished difference Result 82 states and 158 transitions. [2021-06-05 13:44:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:37,214 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:37,214 INFO L225 Difference]: With dead ends: 82 [2021-06-05 13:44:37,214 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 13:44:37,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 13:44:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-06-05 13:44:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 109 transitions. [2021-06-05 13:44:37,217 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 109 transitions. Word has length 15 [2021-06-05 13:44:37,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:37,218 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 109 transitions. [2021-06-05 13:44:37,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 109 transitions. [2021-06-05 13:44:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:37,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:37,218 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:37,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 13:44:37,429 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:37,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:37,430 INFO L82 PathProgramCache]: Analyzing trace with hash 833619410, now seen corresponding path program 8 times [2021-06-05 13:44:37,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:37,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465326244] [2021-06-05 13:44:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:37,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:37,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465326244] [2021-06-05 13:44:37,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465326244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822176930] [2021-06-05 13:44:37,505 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 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 [2021-06-05 13:44:37,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:37,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:37,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:37,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:37,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822176930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:37,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:37,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:37,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68518764] [2021-06-05 13:44:37,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:37,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:37,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:37,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:37,638 INFO L87 Difference]: Start difference. First operand 56 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:37,771 INFO L93 Difference]: Finished difference Result 92 states and 172 transitions. [2021-06-05 13:44:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:37,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:37,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:37,772 INFO L225 Difference]: With dead ends: 92 [2021-06-05 13:44:37,772 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 13:44:37,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 13:44:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2021-06-05 13:44:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 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) [2021-06-05 13:44:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 13:44:37,776 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 13:44:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:37,776 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 13:44:37,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 13:44:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:37,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:37,777 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:37,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 13:44:37,993 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:37,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:37,993 INFO L82 PathProgramCache]: Analyzing trace with hash 849080206, now seen corresponding path program 9 times [2021-06-05 13:44:37,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:37,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606504891] [2021-06-05 13:44:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:38,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:38,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606504891] [2021-06-05 13:44:38,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606504891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:38,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185925400] [2021-06-05 13:44:38,064 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 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 [2021-06-05 13:44:38,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:44:38,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:38,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:38,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:38,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185925400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:38,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:38,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:38,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432166002] [2021-06-05 13:44:38,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:38,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:38,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:38,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:38,201 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:38,330 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-05 13:44:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:38,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:38,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:38,331 INFO L225 Difference]: With dead ends: 98 [2021-06-05 13:44:38,331 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 13:44:38,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 13:44:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2021-06-05 13:44:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-06-05 13:44:38,333 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-06-05 13:44:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:38,333 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-06-05 13:44:38,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,333 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-06-05 13:44:38,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:38,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:38,333 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:38,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 13:44:38,534 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:38,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:38,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1420535012, now seen corresponding path program 10 times [2021-06-05 13:44:38,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:38,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275178462] [2021-06-05 13:44:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:38,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:38,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275178462] [2021-06-05 13:44:38,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275178462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:38,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086277050] [2021-06-05 13:44:38,589 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 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 [2021-06-05 13:44:38,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:38,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:38,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:38,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:38,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086277050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:38,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:38,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:38,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903634877] [2021-06-05 13:44:38,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:38,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:38,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:38,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:38,715 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:38,813 INFO L93 Difference]: Finished difference Result 75 states and 142 transitions. [2021-06-05 13:44:38,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:38,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:38,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:38,813 INFO L225 Difference]: With dead ends: 75 [2021-06-05 13:44:38,814 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 13:44:38,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 13:44:38,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-06-05 13:44:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-06-05 13:44:38,815 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-06-05 13:44:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:38,815 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-06-05 13:44:38,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-06-05 13:44:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:38,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:38,816 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:39,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:39,029 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:39,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1788920398, now seen corresponding path program 11 times [2021-06-05 13:44:39,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:39,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702882533] [2021-06-05 13:44:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:39,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:39,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702882533] [2021-06-05 13:44:39,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702882533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:39,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383563401] [2021-06-05 13:44:39,095 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 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 [2021-06-05 13:44:39,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:44:39,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:39,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:39,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:39,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383563401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:39,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:39,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:39,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052285583] [2021-06-05 13:44:39,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:39,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:39,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:39,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:39,226 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:39,326 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2021-06-05 13:44:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:39,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:39,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:39,326 INFO L225 Difference]: With dead ends: 76 [2021-06-05 13:44:39,327 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 13:44:39,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 13:44:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-06-05 13:44:39,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-06-05 13:44:39,328 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-06-05 13:44:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:39,328 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-06-05 13:44:39,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-06-05 13:44:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:39,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:39,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:39,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 13:44:39,545 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash -426753070, now seen corresponding path program 12 times [2021-06-05 13:44:39,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:39,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869620943] [2021-06-05 13:44:39,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:39,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:39,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869620943] [2021-06-05 13:44:39,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869620943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:39,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856655475] [2021-06-05 13:44:39,612 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 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 [2021-06-05 13:44:39,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:44:39,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:39,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:39,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856655475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:39,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:39,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:39,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969388175] [2021-06-05 13:44:39,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:39,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:39,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:39,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:39,745 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:39,874 INFO L93 Difference]: Finished difference Result 99 states and 184 transitions. [2021-06-05 13:44:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:39,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:39,875 INFO L225 Difference]: With dead ends: 99 [2021-06-05 13:44:39,875 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 13:44:39,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 13:44:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-06-05 13:44:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-06-05 13:44:39,877 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-06-05 13:44:39,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:39,877 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-06-05 13:44:39,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,877 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-06-05 13:44:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:39,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:39,878 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:40,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 13:44:40,093 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash -411292274, now seen corresponding path program 13 times [2021-06-05 13:44:40,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:40,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334745350] [2021-06-05 13:44:40,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:40,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:40,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334745350] [2021-06-05 13:44:40,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334745350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336454657] [2021-06-05 13:44:40,160 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 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 [2021-06-05 13:44:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:40,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:40,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:40,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336454657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:40,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:40,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988235989] [2021-06-05 13:44:40,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:40,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:40,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:40,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:40,295 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:40,421 INFO L93 Difference]: Finished difference Result 86 states and 166 transitions. [2021-06-05 13:44:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:40,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:40,422 INFO L225 Difference]: With dead ends: 86 [2021-06-05 13:44:40,422 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 13:44:40,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 13:44:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-06-05 13:44:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 119 transitions. [2021-06-05 13:44:40,425 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 119 transitions. Word has length 15 [2021-06-05 13:44:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:40,425 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 119 transitions. [2021-06-05 13:44:40,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 119 transitions. [2021-06-05 13:44:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:40,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:40,425 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:40,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 13:44:40,641 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:40,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:40,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1719417690, now seen corresponding path program 14 times [2021-06-05 13:44:40,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:40,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757057455] [2021-06-05 13:44:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:40,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:40,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757057455] [2021-06-05 13:44:40,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757057455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013763069] [2021-06-05 13:44:40,707 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 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 [2021-06-05 13:44:40,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:40,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:40,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:40,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:40,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013763069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:40,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:40,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563905567] [2021-06-05 13:44:40,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:40,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:40,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:40,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:40,827 INFO L87 Difference]: Start difference. First operand 61 states and 119 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:40,943 INFO L93 Difference]: Finished difference Result 96 states and 180 transitions. [2021-06-05 13:44:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:40,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:40,943 INFO L225 Difference]: With dead ends: 96 [2021-06-05 13:44:40,943 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 13:44:40,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 13:44:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-06-05 13:44:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-06-05 13:44:40,945 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-06-05 13:44:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:40,945 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-06-05 13:44:40,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-06-05 13:44:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:40,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:40,946 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:41,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:41,153 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:41,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:41,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1734878486, now seen corresponding path program 15 times [2021-06-05 13:44:41,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:41,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073551573] [2021-06-05 13:44:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:41,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:41,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073551573] [2021-06-05 13:44:41,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073551573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:41,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295886733] [2021-06-05 13:44:41,227 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:44:41,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:44:41,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:41,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:41,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:41,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295886733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:41,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:41,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:41,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603806010] [2021-06-05 13:44:41,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:41,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:41,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:41,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:41,364 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:41,489 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-06-05 13:44:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:41,490 INFO L225 Difference]: With dead ends: 102 [2021-06-05 13:44:41,490 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 13:44:41,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:41,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 13:44:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-06-05 13:44:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-06-05 13:44:41,492 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-06-05 13:44:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:41,492 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-06-05 13:44:41,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-06-05 13:44:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:41,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:41,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:41,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:41,708 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:41,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1988634004, now seen corresponding path program 16 times [2021-06-05 13:44:41,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:41,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17755505] [2021-06-05 13:44:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:41,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:41,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17755505] [2021-06-05 13:44:41,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17755505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:41,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118175754] [2021-06-05 13:44:41,776 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 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 [2021-06-05 13:44:41,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:41,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:41,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:41,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:41,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118175754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:41,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:41,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 13:44:41,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067730069] [2021-06-05 13:44:41,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:41,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:41,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:41,901 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:42,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:42,004 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-06-05 13:44:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:42,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:44:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:42,005 INFO L225 Difference]: With dead ends: 79 [2021-06-05 13:44:42,005 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 13:44:42,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 13:44:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-06-05 13:44:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-06-05 13:44:42,007 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-06-05 13:44:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:42,007 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-06-05 13:44:42,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-06-05 13:44:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:42,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:42,007 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:42,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 13:44:42,221 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:42,221 INFO L82 PathProgramCache]: Analyzing trace with hash 625326102, now seen corresponding path program 17 times [2021-06-05 13:44:42,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:42,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265812796] [2021-06-05 13:44:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:42,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:42,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265812796] [2021-06-05 13:44:42,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265812796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820064619] [2021-06-05 13:44:42,285 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 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 [2021-06-05 13:44:42,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:44:42,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:42,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:42,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:42,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820064619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:42,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 13:44:42,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621770055] [2021-06-05 13:44:42,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:42,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:42,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:42,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:42,427 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:44:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:42,598 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-06-05 13:44:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:42,598 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 [2021-06-05 13:44:42,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:42,599 INFO L225 Difference]: With dead ends: 99 [2021-06-05 13:44:42,599 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 13:44:42,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 13:44:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2021-06-05 13:44:42,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 61 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:42,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 124 transitions. [2021-06-05 13:44:42,601 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 124 transitions. Word has length 15 [2021-06-05 13:44:42,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:42,601 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 124 transitions. [2021-06-05 13:44:42,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:44:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 124 transitions. [2021-06-05 13:44:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:42,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:42,601 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:42,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 13:44:42,816 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash 640786898, now seen corresponding path program 18 times [2021-06-05 13:44:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:42,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752630491] [2021-06-05 13:44:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:42,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:42,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752630491] [2021-06-05 13:44:42,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752630491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211572135] [2021-06-05 13:44:42,886 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 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 [2021-06-05 13:44:42,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:44:42,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:42,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:42,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:43,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211572135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:43,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 13:44:43,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797096674] [2021-06-05 13:44:43,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:43,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:43,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:43,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:43,022 INFO L87 Difference]: Start difference. First operand 62 states and 124 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:44:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:43,164 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-06-05 13:44:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:43,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 [2021-06-05 13:44:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:43,165 INFO L225 Difference]: With dead ends: 105 [2021-06-05 13:44:43,165 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 13:44:43,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 13:44:43,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-06-05 13:44:43,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2021-06-05 13:44:43,167 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 15 [2021-06-05 13:44:43,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:43,167 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2021-06-05 13:44:43,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:44:43,167 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2021-06-05 13:44:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:43,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:43,167 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:43,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:43,373 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:43,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1212241704, now seen corresponding path program 19 times [2021-06-05 13:44:43,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:43,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915917263] [2021-06-05 13:44:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:43,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:43,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915917263] [2021-06-05 13:44:43,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915917263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541555600] [2021-06-05 13:44:43,430 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 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 [2021-06-05 13:44:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:43,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:43,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:43,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541555600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:43,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 13:44:43,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136587137] [2021-06-05 13:44:43,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:43,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:43,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:43,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:43,567 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:44:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:43,671 INFO L93 Difference]: Finished difference Result 85 states and 160 transitions. [2021-06-05 13:44:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 [2021-06-05 13:44:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:43,672 INFO L225 Difference]: With dead ends: 85 [2021-06-05 13:44:43,672 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 13:44:43,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 13:44:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-06-05 13:44:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-06-05 13:44:43,674 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-06-05 13:44:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:43,674 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-06-05 13:44:43,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:44:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-06-05 13:44:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:43,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:43,675 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:43,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 13:44:43,881 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:43,881 INFO L82 PathProgramCache]: Analyzing trace with hash 51263382, now seen corresponding path program 3 times [2021-06-05 13:44:43,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:43,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940810408] [2021-06-05 13:44:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:43,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940810408] [2021-06-05 13:44:43,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940810408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215390619] [2021-06-05 13:44:43,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:44:43,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:44:43,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:43,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:44:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:44,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215390619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:44,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:44:44,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157996969] [2021-06-05 13:44:44,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:44,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:44,017 INFO L87 Difference]: Start difference. First operand 60 states and 117 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) [2021-06-05 13:44:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:44,124 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2021-06-05 13:44:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:44:44,124 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 15 [2021-06-05 13:44:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:44,125 INFO L225 Difference]: With dead ends: 92 [2021-06-05 13:44:44,125 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 13:44:44,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 13:44:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-06-05 13:44:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 127 transitions. [2021-06-05 13:44:44,127 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 127 transitions. Word has length 15 [2021-06-05 13:44:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:44,127 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 127 transitions. [2021-06-05 13:44:44,127 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) [2021-06-05 13:44:44,127 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 127 transitions. [2021-06-05 13:44:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:44,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:44,127 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:44,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:44,341 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash 674386126, now seen corresponding path program 20 times [2021-06-05 13:44:44,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:44,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012102576] [2021-06-05 13:44:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:44,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:44,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012102576] [2021-06-05 13:44:44,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012102576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210477182] [2021-06-05 13:44:44,400 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 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 [2021-06-05 13:44:44,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:44,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:44,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:44,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:44,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210477182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:44,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 13:44:44,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926300489] [2021-06-05 13:44:44,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:44,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:44,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:44,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:44,544 INFO L87 Difference]: Start difference. First operand 64 states and 127 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:44:44,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:44,646 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-05 13:44:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:44,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 [2021-06-05 13:44:44,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:44,648 INFO L225 Difference]: With dead ends: 86 [2021-06-05 13:44:44,648 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 13:44:44,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:44,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 13:44:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-06-05 13:44:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 135 transitions. [2021-06-05 13:44:44,650 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 135 transitions. Word has length 15 [2021-06-05 13:44:44,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:44,650 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 135 transitions. [2021-06-05 13:44:44,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:44:44,650 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 135 transitions. [2021-06-05 13:44:44,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:44,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:44,652 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:44,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 13:44:44,865 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash 59077016, now seen corresponding path program 3 times [2021-06-05 13:44:44,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:44,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43274490] [2021-06-05 13:44:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:44,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:44,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43274490] [2021-06-05 13:44:44,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43274490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640450303] [2021-06-05 13:44:44,940 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 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 [2021-06-05 13:44:44,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:44:44,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:44,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:44:44,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:45,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640450303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:45,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:45,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 13:44:45,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551316721] [2021-06-05 13:44:45,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:45,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:45,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:45,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:45,039 INFO L87 Difference]: Start difference. First operand 69 states and 135 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2021-06-05 13:44:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:45,207 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-06-05 13:44:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:44:45,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 17 [2021-06-05 13:44:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:45,208 INFO L225 Difference]: With dead ends: 97 [2021-06-05 13:44:45,208 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 13:44:45,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:45,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 13:44:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2021-06-05 13:44:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-06-05 13:44:45,210 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-06-05 13:44:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:45,210 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-06-05 13:44:45,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2021-06-05 13:44:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-06-05 13:44:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:45,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:45,211 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:45,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 13:44:45,425 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2083408152, now seen corresponding path program 21 times [2021-06-05 13:44:45,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:45,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846004766] [2021-06-05 13:44:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:45,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:45,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846004766] [2021-06-05 13:44:45,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846004766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:45,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455470867] [2021-06-05 13:44:45,498 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 [2021-06-05 13:44:45,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:44:45,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:45,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:45,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:45,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455470867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:45,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:45,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:45,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446781806] [2021-06-05 13:44:45,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:45,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:45,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:45,690 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:45,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:45,975 INFO L93 Difference]: Finished difference Result 99 states and 188 transitions. [2021-06-05 13:44:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:44:45,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:45,975 INFO L225 Difference]: With dead ends: 99 [2021-06-05 13:44:45,975 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 13:44:45,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:44:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 13:44:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-06-05 13:44:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-06-05 13:44:45,977 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-06-05 13:44:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:45,977 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-06-05 13:44:45,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-06-05 13:44:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:45,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:45,978 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:46,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 13:44:46,193 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:46,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:46,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1700687764, now seen corresponding path program 22 times [2021-06-05 13:44:46,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:46,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385441447] [2021-06-05 13:44:46,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:46,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:46,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385441447] [2021-06-05 13:44:46,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385441447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537430237] [2021-06-05 13:44:46,270 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 [2021-06-05 13:44:46,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:46,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:46,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:46,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:46,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537430237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:46,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:46,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824443746] [2021-06-05 13:44:46,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:46,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:46,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:46,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:46,444 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:46,677 INFO L93 Difference]: Finished difference Result 104 states and 198 transitions. [2021-06-05 13:44:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:44:46,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:46,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:46,678 INFO L225 Difference]: With dead ends: 104 [2021-06-05 13:44:46,678 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 13:44:46,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 13:44:46,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2021-06-05 13:44:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:46,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-05 13:44:46,689 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-06-05 13:44:46,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:46,689 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-05 13:44:46,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:46,689 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-05 13:44:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:46,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:46,690 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:46,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 13:44:46,890 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:46,890 INFO L82 PathProgramCache]: Analyzing trace with hash -514985704, now seen corresponding path program 23 times [2021-06-05 13:44:46,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:46,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105986924] [2021-06-05 13:44:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:46,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:46,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105986924] [2021-06-05 13:44:46,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105986924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079320292] [2021-06-05 13:44:46,972 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 [2021-06-05 13:44:46,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:44:46,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:47,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079320292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:47,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:47,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:47,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778058183] [2021-06-05 13:44:47,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:47,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:47,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:47,140 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:47,427 INFO L93 Difference]: Finished difference Result 130 states and 246 transitions. [2021-06-05 13:44:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:47,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:47,428 INFO L225 Difference]: With dead ends: 130 [2021-06-05 13:44:47,428 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 13:44:47,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 13:44:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-06-05 13:44:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 13:44:47,430 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 13:44:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:47,430 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 13:44:47,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 13:44:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:47,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:47,430 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:47,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:47,646 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:47,646 INFO L82 PathProgramCache]: Analyzing trace with hash -499524908, now seen corresponding path program 24 times [2021-06-05 13:44:47,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:47,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265243016] [2021-06-05 13:44:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:47,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:47,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265243016] [2021-06-05 13:44:47,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265243016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:47,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841029631] [2021-06-05 13:44:47,725 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 [2021-06-05 13:44:47,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:44:47,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:47,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:47,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:47,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841029631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:47,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:47,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:47,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992711154] [2021-06-05 13:44:47,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:47,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:47,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:47,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:47,906 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:48,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:48,185 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 13:44:48,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:48,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:48,186 INFO L225 Difference]: With dead ends: 113 [2021-06-05 13:44:48,186 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 13:44:48,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 13:44:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-06-05 13:44:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-06-05 13:44:48,193 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-06-05 13:44:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:48,193 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-06-05 13:44:48,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-06-05 13:44:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:48,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:48,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:48,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:48,413 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1651089708, now seen corresponding path program 25 times [2021-06-05 13:44:48,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:48,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734189707] [2021-06-05 13:44:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:48,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:48,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734189707] [2021-06-05 13:44:48,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734189707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:48,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384447856] [2021-06-05 13:44:48,494 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 [2021-06-05 13:44:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:48,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:48,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384447856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:48,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:48,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:48,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382566837] [2021-06-05 13:44:48,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:48,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:48,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:48,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:48,681 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:48,927 INFO L93 Difference]: Finished difference Result 124 states and 236 transitions. [2021-06-05 13:44:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:48,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:48,927 INFO L225 Difference]: With dead ends: 124 [2021-06-05 13:44:48,927 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 13:44:48,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 13:44:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2021-06-05 13:44:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 13:44:48,929 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 13:44:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:48,930 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 13:44:48,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 13:44:48,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:48,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:48,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:49,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:49,141 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:49,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1635628912, now seen corresponding path program 26 times [2021-06-05 13:44:49,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:49,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136777579] [2021-06-05 13:44:49,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:49,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:49,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136777579] [2021-06-05 13:44:49,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136777579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:49,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967556630] [2021-06-05 13:44:49,233 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 [2021-06-05 13:44:49,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:49,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:49,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:49,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:49,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967556630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:49,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:49,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:49,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17160246] [2021-06-05 13:44:49,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:49,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:49,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:49,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:49,406 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:49,667 INFO L93 Difference]: Finished difference Result 127 states and 241 transitions. [2021-06-05 13:44:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:44:49,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:49,668 INFO L225 Difference]: With dead ends: 127 [2021-06-05 13:44:49,668 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 13:44:49,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 13:44:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2021-06-05 13:44:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-05 13:44:49,670 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-06-05 13:44:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:49,670 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-05 13:44:49,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:49,670 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-05 13:44:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:49,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:49,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:49,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 13:44:49,886 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:49,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1064174106, now seen corresponding path program 27 times [2021-06-05 13:44:49,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:49,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956210896] [2021-06-05 13:44:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:49,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:49,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956210896] [2021-06-05 13:44:49,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956210896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:49,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350744213] [2021-06-05 13:44:49,959 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 [2021-06-05 13:44:49,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:44:49,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:49,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:50,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350744213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:50,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:50,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569485802] [2021-06-05 13:44:50,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:50,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:50,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:50,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:50,123 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:50,253 INFO L93 Difference]: Finished difference Result 96 states and 184 transitions. [2021-06-05 13:44:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:44:50,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:50,253 INFO L225 Difference]: With dead ends: 96 [2021-06-05 13:44:50,253 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 13:44:50,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 13:44:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-06-05 13:44:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-06-05 13:44:50,255 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-06-05 13:44:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:50,255 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-06-05 13:44:50,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-06-05 13:44:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:50,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:50,255 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:50,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:50,461 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1845444760, now seen corresponding path program 28 times [2021-06-05 13:44:50,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:50,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473189683] [2021-06-05 13:44:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:50,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:50,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473189683] [2021-06-05 13:44:50,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473189683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680743640] [2021-06-05 13:44:50,538 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 [2021-06-05 13:44:50,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:50,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:50,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:50,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:50,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680743640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:50,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:44:50,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150969527] [2021-06-05 13:44:50,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:44:50,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:50,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:44:50,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:50,757 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 13:44:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:51,182 INFO L93 Difference]: Finished difference Result 112 states and 205 transitions. [2021-06-05 13:44:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:44:51,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-05 13:44:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:51,182 INFO L225 Difference]: With dead ends: 112 [2021-06-05 13:44:51,182 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 13:44:51,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 534.5ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:44:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 13:44:51,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-06-05 13:44:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-06-05 13:44:51,184 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-06-05 13:44:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:51,184 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-06-05 13:44:51,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 13:44:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-06-05 13:44:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:51,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:51,184 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:51,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 13:44:51,393 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:51,393 INFO L82 PathProgramCache]: Analyzing trace with hash -695788720, now seen corresponding path program 29 times [2021-06-05 13:44:51,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:51,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839736679] [2021-06-05 13:44:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:51,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:51,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839736679] [2021-06-05 13:44:51,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839736679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:51,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899934119] [2021-06-05 13:44:51,471 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 [2021-06-05 13:44:51,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:44:51,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:51,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:51,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:51,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899934119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:51,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:51,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:51,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448799033] [2021-06-05 13:44:51,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:51,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:51,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:51,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:51,633 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:51,861 INFO L93 Difference]: Finished difference Result 95 states and 181 transitions. [2021-06-05 13:44:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:44:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:51,862 INFO L225 Difference]: With dead ends: 95 [2021-06-05 13:44:51,862 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 13:44:51,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 13:44:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2021-06-05 13:44:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-06-05 13:44:51,863 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-06-05 13:44:51,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:51,863 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-06-05 13:44:51,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-06-05 13:44:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:51,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:51,864 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:52,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:52,070 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:52,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1383505108, now seen corresponding path program 30 times [2021-06-05 13:44:52,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:52,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374109653] [2021-06-05 13:44:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:52,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:52,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374109653] [2021-06-05 13:44:52,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374109653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:52,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886317555] [2021-06-05 13:44:52,146 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 [2021-06-05 13:44:52,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:44:52,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:52,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:52,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:52,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886317555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:52,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:52,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:52,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547013092] [2021-06-05 13:44:52,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:52,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:52,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:52,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:52,313 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:52,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:52,585 INFO L93 Difference]: Finished difference Result 136 states and 258 transitions. [2021-06-05 13:44:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:52,585 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:52,586 INFO L225 Difference]: With dead ends: 136 [2021-06-05 13:44:52,586 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 13:44:52,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:52,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 13:44:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 76. [2021-06-05 13:44:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 13:44:52,588 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 13:44:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:52,588 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 13:44:52,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 13:44:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:52,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:52,588 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:52,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 13:44:52,797 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:52,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:52,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1398965904, now seen corresponding path program 31 times [2021-06-05 13:44:52,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:52,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564633138] [2021-06-05 13:44:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:52,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:52,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564633138] [2021-06-05 13:44:52,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564633138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:52,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007212432] [2021-06-05 13:44:52,876 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 [2021-06-05 13:44:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:52,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:53,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007212432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:53,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:53,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:53,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45058175] [2021-06-05 13:44:53,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:53,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:53,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:53,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:53,063 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:53,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:53,363 INFO L93 Difference]: Finished difference Result 122 states and 238 transitions. [2021-06-05 13:44:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:53,363 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:53,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:53,365 INFO L225 Difference]: With dead ends: 122 [2021-06-05 13:44:53,365 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 13:44:53,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 13:44:53,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 74. [2021-06-05 13:44:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 145 transitions. [2021-06-05 13:44:53,367 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 145 transitions. Word has length 17 [2021-06-05 13:44:53,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:53,367 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 145 transitions. [2021-06-05 13:44:53,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:53,367 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 145 transitions. [2021-06-05 13:44:53,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:53,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:53,367 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:53,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 13:44:53,577 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:53,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:53,577 INFO L82 PathProgramCache]: Analyzing trace with hash -765291428, now seen corresponding path program 32 times [2021-06-05 13:44:53,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:53,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120436089] [2021-06-05 13:44:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:53,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:53,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120436089] [2021-06-05 13:44:53,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120436089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:53,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101493351] [2021-06-05 13:44:53,656 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 [2021-06-05 13:44:53,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:53,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:53,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:53,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101493351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:53,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:53,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:53,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001486296] [2021-06-05 13:44:53,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:53,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:53,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:53,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:53,830 INFO L87 Difference]: Start difference. First operand 74 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:54,110 INFO L93 Difference]: Finished difference Result 134 states and 256 transitions. [2021-06-05 13:44:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:44:54,111 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:54,111 INFO L225 Difference]: With dead ends: 134 [2021-06-05 13:44:54,111 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 13:44:54,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 13:44:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 76. [2021-06-05 13:44:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 13:44:54,113 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 13:44:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:54,113 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 13:44:54,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 13:44:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:54,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:54,113 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:54,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 13:44:54,329 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:54,329 INFO L82 PathProgramCache]: Analyzing trace with hash -749830632, now seen corresponding path program 33 times [2021-06-05 13:44:54,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:54,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256131207] [2021-06-05 13:44:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:54,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:54,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256131207] [2021-06-05 13:44:54,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256131207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:54,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415840433] [2021-06-05 13:44:54,407 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 [2021-06-05 13:44:54,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:44:54,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:54,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:54,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:54,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415840433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:54,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:54,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:54,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097396810] [2021-06-05 13:44:54,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:54,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:54,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:54,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:54,588 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:54,958 INFO L93 Difference]: Finished difference Result 145 states and 275 transitions. [2021-06-05 13:44:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:44:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:54,959 INFO L225 Difference]: With dead ends: 145 [2021-06-05 13:44:54,959 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 13:44:54,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 367.8ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:44:54,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 13:44:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 75. [2021-06-05 13:44:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:54,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-06-05 13:44:54,960 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-06-05 13:44:54,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:54,961 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-06-05 13:44:54,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-06-05 13:44:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:54,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:54,961 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:55,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 13:44:55,169 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:55,169 INFO L82 PathProgramCache]: Analyzing trace with hash -178375826, now seen corresponding path program 34 times [2021-06-05 13:44:55,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:55,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252946154] [2021-06-05 13:44:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:55,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:55,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252946154] [2021-06-05 13:44:55,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252946154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:55,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743984029] [2021-06-05 13:44:55,246 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 [2021-06-05 13:44:55,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:55,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:55,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:55,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743984029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:55,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:55,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:55,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867490506] [2021-06-05 13:44:55,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:55,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:55,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:55,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:55,413 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:55,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:55,654 INFO L93 Difference]: Finished difference Result 105 states and 200 transitions. [2021-06-05 13:44:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:44:55,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:55,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:55,655 INFO L225 Difference]: With dead ends: 105 [2021-06-05 13:44:55,655 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 13:44:55,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:55,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 13:44:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2021-06-05 13:44:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-06-05 13:44:55,657 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-06-05 13:44:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:55,657 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-06-05 13:44:55,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-06-05 13:44:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:55,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:55,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:55,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:55,873 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:55,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:55,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1859383016, now seen corresponding path program 35 times [2021-06-05 13:44:55,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:55,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750833614] [2021-06-05 13:44:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:55,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:55,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750833614] [2021-06-05 13:44:55,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750833614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:55,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95384284] [2021-06-05 13:44:55,947 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 [2021-06-05 13:44:55,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:44:55,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:55,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:55,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:56,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95384284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:56,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:56,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:56,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408600475] [2021-06-05 13:44:56,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:56,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:56,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:56,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:56,116 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:56,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:56,465 INFO L93 Difference]: Finished difference Result 154 states and 296 transitions. [2021-06-05 13:44:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:44:56,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:56,466 INFO L225 Difference]: With dead ends: 154 [2021-06-05 13:44:56,466 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 13:44:56,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:44:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 13:44:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 76. [2021-06-05 13:44:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 75 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2021-06-05 13:44:56,468 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 17 [2021-06-05 13:44:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:56,468 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2021-06-05 13:44:56,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2021-06-05 13:44:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:56,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:56,468 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:56,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 13:44:56,684 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:56,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1843922220, now seen corresponding path program 36 times [2021-06-05 13:44:56,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:56,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993432528] [2021-06-05 13:44:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:56,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:56,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993432528] [2021-06-05 13:44:56,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993432528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:56,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273589683] [2021-06-05 13:44:56,771 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 [2021-06-05 13:44:56,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:44:56,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:56,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:56,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273589683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:56,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:56,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:56,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451296552] [2021-06-05 13:44:56,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:56,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:56,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:56,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:56,938 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:57,349 INFO L93 Difference]: Finished difference Result 168 states and 320 transitions. [2021-06-05 13:44:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:44:57,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:57,350 INFO L225 Difference]: With dead ends: 168 [2021-06-05 13:44:57,350 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 13:44:57,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:44:57,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 13:44:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 75. [2021-06-05 13:44:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-06-05 13:44:57,352 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-06-05 13:44:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:57,352 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-06-05 13:44:57,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-06-05 13:44:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:57,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:57,352 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:57,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:57,561 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1272467414, now seen corresponding path program 37 times [2021-06-05 13:44:57,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:57,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144079457] [2021-06-05 13:44:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:57,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:57,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144079457] [2021-06-05 13:44:57,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144079457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:57,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569498215] [2021-06-05 13:44:57,643 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 [2021-06-05 13:44:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:57,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:57,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:57,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569498215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:57,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:57,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:44:57,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924802000] [2021-06-05 13:44:57,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:57,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:57,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:57,814 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:58,128 INFO L93 Difference]: Finished difference Result 126 states and 240 transitions. [2021-06-05 13:44:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:44:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:44:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:58,129 INFO L225 Difference]: With dead ends: 126 [2021-06-05 13:44:58,129 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 13:44:58,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:44:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 13:44:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 74. [2021-06-05 13:44:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 73 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 147 transitions. [2021-06-05 13:44:58,131 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 147 transitions. Word has length 17 [2021-06-05 13:44:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:58,131 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 147 transitions. [2021-06-05 13:44:58,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:44:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 147 transitions. [2021-06-05 13:44:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:58,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:58,131 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:58,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:58,331 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:58,332 INFO L82 PathProgramCache]: Analyzing trace with hash 164948120, now seen corresponding path program 38 times [2021-06-05 13:44:58,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:58,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320210440] [2021-06-05 13:44:58,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:58,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:58,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320210440] [2021-06-05 13:44:58,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320210440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:58,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447127457] [2021-06-05 13:44:58,398 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 [2021-06-05 13:44:58,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:58,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:58,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:58,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:58,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447127457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:58,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:58,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:44:58,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773158488] [2021-06-05 13:44:58,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:44:58,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:58,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:44:58,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:58,574 INFO L87 Difference]: Start difference. First operand 74 states and 147 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 13:44:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:58,993 INFO L93 Difference]: Finished difference Result 140 states and 249 transitions. [2021-06-05 13:44:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:44:58,993 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-05 13:44:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:58,993 INFO L225 Difference]: With dead ends: 140 [2021-06-05 13:44:58,994 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 13:44:58,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 494.9ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:44:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 13:44:58,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-06-05 13:44:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 78 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 157 transitions. [2021-06-05 13:44:58,995 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 157 transitions. Word has length 17 [2021-06-05 13:44:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:58,995 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 157 transitions. [2021-06-05 13:44:58,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 13:44:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 157 transitions. [2021-06-05 13:44:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:58,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:58,996 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:59,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 13:44:59,205 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:59,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:59,205 INFO L82 PathProgramCache]: Analyzing trace with hash -217772268, now seen corresponding path program 39 times [2021-06-05 13:44:59,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:59,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344470187] [2021-06-05 13:44:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:59,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:59,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344470187] [2021-06-05 13:44:59,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344470187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:59,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093717093] [2021-06-05 13:44:59,274 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 [2021-06-05 13:44:59,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:44:59,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:59,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:44:59,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:59,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093717093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:59,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:59,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:44:59,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016398039] [2021-06-05 13:44:59,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:44:59,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:44:59,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:59,476 INFO L87 Difference]: Start difference. First operand 79 states and 157 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 13:44:59,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:59,783 INFO L93 Difference]: Finished difference Result 111 states and 210 transitions. [2021-06-05 13:44:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:44:59,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-05 13:44:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:59,784 INFO L225 Difference]: With dead ends: 111 [2021-06-05 13:44:59,784 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 13:44:59,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:44:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 13:44:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77. [2021-06-05 13:44:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-06-05 13:44:59,786 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-06-05 13:44:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:59,786 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-06-05 13:44:59,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 13:44:59,786 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-06-05 13:44:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:59,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:59,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:59,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 13:44:59,986 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:59,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1861521560, now seen corresponding path program 40 times [2021-06-05 13:44:59,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:59,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995466964] [2021-06-05 13:44:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:00,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:00,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995466964] [2021-06-05 13:45:00,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995466964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460479449] [2021-06-05 13:45:00,058 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 [2021-06-05 13:45:00,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:00,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:00,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:00,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:00,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460479449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:00,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:45:00,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253152302] [2021-06-05 13:45:00,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:45:00,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:00,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:45:00,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:45:00,257 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 13:45:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:00,852 INFO L93 Difference]: Finished difference Result 182 states and 330 transitions. [2021-06-05 13:45:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:45:00,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-05 13:45:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:00,853 INFO L225 Difference]: With dead ends: 182 [2021-06-05 13:45:00,853 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 13:45:00,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 614.4ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:45:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 13:45:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 78. [2021-06-05 13:45:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 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) [2021-06-05 13:45:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-06-05 13:45:00,855 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 17 [2021-06-05 13:45:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:00,855 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-06-05 13:45:00,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 13:45:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-06-05 13:45:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:00,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:00,856 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:01,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 13:45:01,056 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1876982356, now seen corresponding path program 41 times [2021-06-05 13:45:01,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:01,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303935546] [2021-06-05 13:45:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:01,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:01,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303935546] [2021-06-05 13:45:01,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303935546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:01,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701394651] [2021-06-05 13:45:01,149 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 [2021-06-05 13:45:01,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:01,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:01,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:01,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701394651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:01,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:01,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:45:01,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100774155] [2021-06-05 13:45:01,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:45:01,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:01,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:45:01,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:45:01,341 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 13:45:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:01,999 INFO L93 Difference]: Finished difference Result 174 states and 320 transitions. [2021-06-05 13:45:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:45:01,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-05 13:45:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:02,000 INFO L225 Difference]: With dead ends: 174 [2021-06-05 13:45:02,000 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 13:45:02,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:45:02,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 13:45:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 77. [2021-06-05 13:45:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-06-05 13:45:02,002 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-06-05 13:45:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:02,002 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-06-05 13:45:02,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 13:45:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-06-05 13:45:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:02,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:02,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:02,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:02,233 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:02,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1810322992, now seen corresponding path program 42 times [2021-06-05 13:45:02,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:02,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749847049] [2021-06-05 13:45:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:02,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:02,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749847049] [2021-06-05 13:45:02,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749847049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:02,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224832997] [2021-06-05 13:45:02,305 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 [2021-06-05 13:45:02,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:45:02,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:02,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:02,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:02,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224832997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:02,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:02,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:02,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188241625] [2021-06-05 13:45:02,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:02,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:02,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:02,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:02,473 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:02,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:02,733 INFO L93 Difference]: Finished difference Result 127 states and 236 transitions. [2021-06-05 13:45:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:02,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:02,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:02,734 INFO L225 Difference]: With dead ends: 127 [2021-06-05 13:45:02,734 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 13:45:02,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 13:45:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-06-05 13:45:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 165 transitions. [2021-06-05 13:45:02,736 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 165 transitions. Word has length 17 [2021-06-05 13:45:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:02,736 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 165 transitions. [2021-06-05 13:45:02,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 165 transitions. [2021-06-05 13:45:02,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:02,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:02,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:02,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 13:45:02,953 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1561329620, now seen corresponding path program 43 times [2021-06-05 13:45:02,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:02,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275000235] [2021-06-05 13:45:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:03,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:03,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275000235] [2021-06-05 13:45:03,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275000235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:03,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025323368] [2021-06-05 13:45:03,027 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 [2021-06-05 13:45:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:03,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:03,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:03,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025323368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:03,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:03,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:03,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789936112] [2021-06-05 13:45:03,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:03,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:03,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:03,165 INFO L87 Difference]: Start difference. First operand 84 states and 165 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:03,527 INFO L93 Difference]: Finished difference Result 163 states and 312 transitions. [2021-06-05 13:45:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:03,527 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:03,528 INFO L225 Difference]: With dead ends: 163 [2021-06-05 13:45:03,528 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 13:45:03,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 13:45:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 87. [2021-06-05 13:45:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 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) [2021-06-05 13:45:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 176 transitions. [2021-06-05 13:45:03,531 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 176 transitions. Word has length 17 [2021-06-05 13:45:03,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:03,531 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 176 transitions. [2021-06-05 13:45:03,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 176 transitions. [2021-06-05 13:45:03,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:03,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:03,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:03,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 13:45:03,745 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:03,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1576790416, now seen corresponding path program 44 times [2021-06-05 13:45:03,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:03,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39197746] [2021-06-05 13:45:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:03,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:03,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39197746] [2021-06-05 13:45:03,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39197746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:03,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674040375] [2021-06-05 13:45:03,833 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 [2021-06-05 13:45:03,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:03,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:03,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:03,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:03,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674040375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:03,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:03,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:03,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662573420] [2021-06-05 13:45:03,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:03,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:03,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:03,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:03,990 INFO L87 Difference]: Start difference. First operand 87 states and 176 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:04,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:04,418 INFO L93 Difference]: Finished difference Result 175 states and 333 transitions. [2021-06-05 13:45:04,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:04,418 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:04,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:04,419 INFO L225 Difference]: With dead ends: 175 [2021-06-05 13:45:04,419 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 13:45:04,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 387.6ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 13:45:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 86. [2021-06-05 13:45:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-06-05 13:45:04,421 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-06-05 13:45:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:04,421 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-06-05 13:45:04,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:04,421 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-06-05 13:45:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:04,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:04,421 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:04,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:04,622 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:04,622 INFO L82 PathProgramCache]: Analyzing trace with hash -2146722074, now seen corresponding path program 45 times [2021-06-05 13:45:04,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:04,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656756000] [2021-06-05 13:45:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:04,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:04,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656756000] [2021-06-05 13:45:04,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656756000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:04,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258175722] [2021-06-05 13:45:04,694 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 [2021-06-05 13:45:04,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:45:04,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:04,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:04,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:04,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258175722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:04,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:04,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:04,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499852268] [2021-06-05 13:45:04,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:04,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:04,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:04,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:04,850 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:05,172 INFO L93 Difference]: Finished difference Result 138 states and 262 transitions. [2021-06-05 13:45:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:05,173 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:05,173 INFO L225 Difference]: With dead ends: 138 [2021-06-05 13:45:05,173 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 13:45:05,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 13:45:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2021-06-05 13:45:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-06-05 13:45:05,175 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-06-05 13:45:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:05,175 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-06-05 13:45:05,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-06-05 13:45:05,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:05,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:05,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:05,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 13:45:05,391 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:05,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:05,391 INFO L82 PathProgramCache]: Analyzing trace with hash -709306540, now seen corresponding path program 46 times [2021-06-05 13:45:05,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:05,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086292883] [2021-06-05 13:45:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:05,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:05,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086292883] [2021-06-05 13:45:05,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086292883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:05,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806082044] [2021-06-05 13:45:05,457 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 [2021-06-05 13:45:05,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:05,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:05,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:05,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806082044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:05,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:05,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:05,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158921545] [2021-06-05 13:45:05,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:05,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:05,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:05,627 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:05,883 INFO L93 Difference]: Finished difference Result 145 states and 268 transitions. [2021-06-05 13:45:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:05,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:05,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:05,884 INFO L225 Difference]: With dead ends: 145 [2021-06-05 13:45:05,884 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 13:45:05,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 13:45:05,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-06-05 13:45:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-06-05 13:45:05,885 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-06-05 13:45:05,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:05,885 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-06-05 13:45:05,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,886 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-06-05 13:45:05,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:05,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:05,886 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:06,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:06,097 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:06,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1092026928, now seen corresponding path program 47 times [2021-06-05 13:45:06,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:06,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960021622] [2021-06-05 13:45:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:06,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:06,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960021622] [2021-06-05 13:45:06,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960021622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:06,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283119088] [2021-06-05 13:45:06,169 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 [2021-06-05 13:45:06,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:45:06,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:06,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:06,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:06,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283119088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:06,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:06,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:06,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074929134] [2021-06-05 13:45:06,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:06,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:06,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:06,348 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:06,664 INFO L93 Difference]: Finished difference Result 134 states and 261 transitions. [2021-06-05 13:45:06,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:06,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:06,665 INFO L225 Difference]: With dead ends: 134 [2021-06-05 13:45:06,665 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 13:45:06,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 13:45:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-06-05 13:45:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0625) internal successors, (198), 96 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 198 transitions. [2021-06-05 13:45:06,667 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 198 transitions. Word has length 17 [2021-06-05 13:45:06,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:06,667 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 198 transitions. [2021-06-05 13:45:06,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 198 transitions. [2021-06-05 13:45:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:06,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:06,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:06,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 13:45:06,868 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:06,868 INFO L82 PathProgramCache]: Analyzing trace with hash 987266900, now seen corresponding path program 48 times [2021-06-05 13:45:06,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:06,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538580484] [2021-06-05 13:45:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:06,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:06,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538580484] [2021-06-05 13:45:06,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538580484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:06,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455820754] [2021-06-05 13:45:06,946 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 [2021-06-05 13:45:06,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:06,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:06,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:06,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:07,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455820754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:07,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:07,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307340359] [2021-06-05 13:45:07,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:07,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:07,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:07,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:07,111 INFO L87 Difference]: Start difference. First operand 97 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:07,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:07,491 INFO L93 Difference]: Finished difference Result 175 states and 338 transitions. [2021-06-05 13:45:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:45:07,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:07,492 INFO L225 Difference]: With dead ends: 175 [2021-06-05 13:45:07,492 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 13:45:07,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 13:45:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 98. [2021-06-05 13:45:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-06-05 13:45:07,494 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 17 [2021-06-05 13:45:07,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:07,494 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-06-05 13:45:07,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-06-05 13:45:07,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:07,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:07,494 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:07,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 13:45:07,709 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:07,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1002727696, now seen corresponding path program 49 times [2021-06-05 13:45:07,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:07,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657172810] [2021-06-05 13:45:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:07,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:07,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657172810] [2021-06-05 13:45:07,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657172810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375521770] [2021-06-05 13:45:07,779 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 [2021-06-05 13:45:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:07,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:07,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:07,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375521770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:07,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:07,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482906081] [2021-06-05 13:45:07,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:07,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:07,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:07,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:07,949 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:08,267 INFO L93 Difference]: Finished difference Result 165 states and 325 transitions. [2021-06-05 13:45:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:08,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:08,268 INFO L225 Difference]: With dead ends: 165 [2021-06-05 13:45:08,268 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 13:45:08,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 13:45:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 96. [2021-06-05 13:45:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-06-05 13:45:08,270 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-06-05 13:45:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:08,270 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-06-05 13:45:08,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-06-05 13:45:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:08,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:08,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:08,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:08,470 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:08,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1610389644, now seen corresponding path program 50 times [2021-06-05 13:45:08,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:08,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197726172] [2021-06-05 13:45:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:08,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:08,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197726172] [2021-06-05 13:45:08,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197726172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:08,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623575778] [2021-06-05 13:45:08,535 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 [2021-06-05 13:45:08,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:08,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:08,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:08,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:08,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623575778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:08,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:08,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:08,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091824230] [2021-06-05 13:45:08,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:08,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:08,686 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:09,051 INFO L93 Difference]: Finished difference Result 162 states and 306 transitions. [2021-06-05 13:45:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:45:09,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:09,051 INFO L225 Difference]: With dead ends: 162 [2021-06-05 13:45:09,051 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 13:45:09,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 386.9ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 13:45:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2021-06-05 13:45:09,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.02) internal successors, (202), 100 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 202 transitions. [2021-06-05 13:45:09,069 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 202 transitions. Word has length 17 [2021-06-05 13:45:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:09,069 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 202 transitions. [2021-06-05 13:45:09,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 202 transitions. [2021-06-05 13:45:09,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:09,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:09,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:09,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 13:45:09,285 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash -79334396, now seen corresponding path program 51 times [2021-06-05 13:45:09,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:09,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19325139] [2021-06-05 13:45:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:09,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:09,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19325139] [2021-06-05 13:45:09,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19325139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507465589] [2021-06-05 13:45:09,357 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 [2021-06-05 13:45:09,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:45:09,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:09,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:09,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:09,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507465589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:09,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:09,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479635033] [2021-06-05 13:45:09,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:09,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:09,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:09,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:09,538 INFO L87 Difference]: Start difference. First operand 101 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:09,718 INFO L93 Difference]: Finished difference Result 121 states and 234 transitions. [2021-06-05 13:45:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:09,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:09,719 INFO L225 Difference]: With dead ends: 121 [2021-06-05 13:45:09,719 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 13:45:09,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:09,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 13:45:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-06-05 13:45:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-05 13:45:09,721 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-05 13:45:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:09,721 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-05 13:45:09,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-05 13:45:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:09,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:09,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:09,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:09,937 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:09,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1999959432, now seen corresponding path program 52 times [2021-06-05 13:45:09,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:09,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821816381] [2021-06-05 13:45:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:10,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:10,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821816381] [2021-06-05 13:45:10,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821816381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:10,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555461926] [2021-06-05 13:45:10,014 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 [2021-06-05 13:45:10,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:10,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:10,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:10,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555461926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:10,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:10,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:10,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920169404] [2021-06-05 13:45:10,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:10,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:10,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:10,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:10,190 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:10,500 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-05 13:45:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:10,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:10,501 INFO L225 Difference]: With dead ends: 160 [2021-06-05 13:45:10,501 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 13:45:10,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 354.4ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 13:45:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2021-06-05 13:45:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-06-05 13:45:10,505 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-06-05 13:45:10,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:10,505 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-06-05 13:45:10,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-06-05 13:45:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:10,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:10,505 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:10,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 13:45:10,706 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:10,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:10,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2015420228, now seen corresponding path program 53 times [2021-06-05 13:45:10,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:10,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404647042] [2021-06-05 13:45:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:10,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:10,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404647042] [2021-06-05 13:45:10,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404647042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:10,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449603853] [2021-06-05 13:45:10,776 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 [2021-06-05 13:45:10,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:10,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:10,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:10,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:10,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449603853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:10,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:10,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:10,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672302168] [2021-06-05 13:45:10,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:10,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:10,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:10,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:10,934 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:11,207 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-06-05 13:45:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:11,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:11,208 INFO L225 Difference]: With dead ends: 152 [2021-06-05 13:45:11,208 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 13:45:11,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 13:45:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 96. [2021-06-05 13:45:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 191 transitions. [2021-06-05 13:45:11,210 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 191 transitions. Word has length 17 [2021-06-05 13:45:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:11,210 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 191 transitions. [2021-06-05 13:45:11,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 191 transitions. [2021-06-05 13:45:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:11,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:11,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:11,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 13:45:11,411 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash -148837104, now seen corresponding path program 54 times [2021-06-05 13:45:11,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:11,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607271179] [2021-06-05 13:45:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:11,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:11,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607271179] [2021-06-05 13:45:11,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607271179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:11,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140344651] [2021-06-05 13:45:11,483 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 [2021-06-05 13:45:11,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:11,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:11,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:11,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:11,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140344651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:11,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:11,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:11,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878434974] [2021-06-05 13:45:11,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:11,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:11,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:11,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:11,620 INFO L87 Difference]: Start difference. First operand 96 states and 191 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:11,820 INFO L93 Difference]: Finished difference Result 155 states and 299 transitions. [2021-06-05 13:45:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:11,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:11,821 INFO L225 Difference]: With dead ends: 155 [2021-06-05 13:45:11,821 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 13:45:11,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 13:45:11,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 98. [2021-06-05 13:45:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-06-05 13:45:11,823 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-06-05 13:45:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:11,823 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-06-05 13:45:11,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-06-05 13:45:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:11,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:11,823 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:12,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:12,024 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:12,024 INFO L82 PathProgramCache]: Analyzing trace with hash -133376308, now seen corresponding path program 55 times [2021-06-05 13:45:12,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:12,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68633945] [2021-06-05 13:45:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:12,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:12,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68633945] [2021-06-05 13:45:12,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68633945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:12,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737761077] [2021-06-05 13:45:12,097 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 [2021-06-05 13:45:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:12,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:12,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:12,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737761077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:12,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:12,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:12,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560190153] [2021-06-05 13:45:12,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:12,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:12,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:12,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:12,264 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:12,480 INFO L93 Difference]: Finished difference Result 167 states and 320 transitions. [2021-06-05 13:45:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:12,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:12,481 INFO L225 Difference]: With dead ends: 167 [2021-06-05 13:45:12,481 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 13:45:12,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 13:45:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2021-06-05 13:45:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-05 13:45:12,483 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-05 13:45:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:12,483 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-05 13:45:12,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-05 13:45:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:12,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:12,483 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:12,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:12,697 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash 438078498, now seen corresponding path program 56 times [2021-06-05 13:45:12,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:12,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390796760] [2021-06-05 13:45:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:12,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:12,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390796760] [2021-06-05 13:45:12,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390796760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:12,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798925068] [2021-06-05 13:45:12,765 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 [2021-06-05 13:45:12,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:12,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:12,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:12,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798925068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:12,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:12,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:45:12,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475560788] [2021-06-05 13:45:12,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:12,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:12,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:12,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:12,917 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:13,118 INFO L93 Difference]: Finished difference Result 128 states and 247 transitions. [2021-06-05 13:45:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:45:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:13,119 INFO L225 Difference]: With dead ends: 128 [2021-06-05 13:45:13,119 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 13:45:13,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 13:45:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-06-05 13:45:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-05 13:45:13,121 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-05 13:45:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:13,121 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-05 13:45:13,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-05 13:45:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:13,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:13,121 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:13,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:13,333 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:13,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash 984287384, now seen corresponding path program 57 times [2021-06-05 13:45:13,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:13,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771788516] [2021-06-05 13:45:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:13,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:13,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771788516] [2021-06-05 13:45:13,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771788516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:13,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450272581] [2021-06-05 13:45:13,402 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 [2021-06-05 13:45:13,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:13,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:13,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:13,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:13,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450272581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:13,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:13,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:13,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601101060] [2021-06-05 13:45:13,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:13,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:13,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:13,571 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:13,822 INFO L93 Difference]: Finished difference Result 163 states and 297 transitions. [2021-06-05 13:45:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:13,822 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:13,823 INFO L225 Difference]: With dead ends: 163 [2021-06-05 13:45:13,823 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 13:45:13,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 13:45:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2021-06-05 13:45:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 102 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 207 transitions. [2021-06-05 13:45:13,825 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 207 transitions. Word has length 17 [2021-06-05 13:45:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:13,825 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 207 transitions. [2021-06-05 13:45:13,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 207 transitions. [2021-06-05 13:45:13,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:13,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:13,825 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:14,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:14,034 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:14,034 INFO L82 PathProgramCache]: Analyzing trace with hash 601566996, now seen corresponding path program 58 times [2021-06-05 13:45:14,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:14,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263762919] [2021-06-05 13:45:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:14,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:14,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263762919] [2021-06-05 13:45:14,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263762919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:14,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967901442] [2021-06-05 13:45:14,101 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 [2021-06-05 13:45:14,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:14,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:14,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:14,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:14,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967901442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:14,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:14,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:14,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449535098] [2021-06-05 13:45:14,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:14,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:14,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:14,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:14,276 INFO L87 Difference]: Start difference. First operand 103 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:14,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:14,581 INFO L93 Difference]: Finished difference Result 144 states and 280 transitions. [2021-06-05 13:45:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:14,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:14,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:14,582 INFO L225 Difference]: With dead ends: 144 [2021-06-05 13:45:14,582 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 13:45:14,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:14,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 13:45:14,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2021-06-05 13:45:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-06-05 13:45:14,584 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 17 [2021-06-05 13:45:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:14,584 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-06-05 13:45:14,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:14,584 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-06-05 13:45:14,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:14,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:14,585 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:14,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:14,801 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1614106472, now seen corresponding path program 59 times [2021-06-05 13:45:14,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:14,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375268386] [2021-06-05 13:45:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:14,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:14,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375268386] [2021-06-05 13:45:14,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375268386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:14,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709442821] [2021-06-05 13:45:14,872 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 [2021-06-05 13:45:14,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:45:14,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:14,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:14,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:15,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709442821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:15,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:15,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:15,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147347212] [2021-06-05 13:45:15,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:15,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:15,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:15,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:15,055 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:15,492 INFO L93 Difference]: Finished difference Result 190 states and 368 transitions. [2021-06-05 13:45:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:45:15,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:15,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:15,493 INFO L225 Difference]: With dead ends: 190 [2021-06-05 13:45:15,493 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 13:45:15,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 13:45:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 105. [2021-06-05 13:45:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-06-05 13:45:15,495 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 17 [2021-06-05 13:45:15,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:15,495 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-06-05 13:45:15,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:15,495 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-06-05 13:45:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:15,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:15,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:15,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 13:45:15,696 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:15,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:15,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1598645676, now seen corresponding path program 60 times [2021-06-05 13:45:15,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:15,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649731083] [2021-06-05 13:45:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:15,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:15,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649731083] [2021-06-05 13:45:15,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649731083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:15,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087432219] [2021-06-05 13:45:15,768 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 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 [2021-06-05 13:45:15,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:15,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:15,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:15,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:15,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087432219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:15,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:15,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:15,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63329206] [2021-06-05 13:45:15,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:15,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:15,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:15,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:15,915 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:16,274 INFO L93 Difference]: Finished difference Result 178 states and 352 transitions. [2021-06-05 13:45:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:16,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:16,275 INFO L225 Difference]: With dead ends: 178 [2021-06-05 13:45:16,275 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 13:45:16,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 13:45:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 102. [2021-06-05 13:45:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.00990099009901) internal successors, (203), 101 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 203 transitions. [2021-06-05 13:45:16,277 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 203 transitions. Word has length 17 [2021-06-05 13:45:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:16,277 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 203 transitions. [2021-06-05 13:45:16,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 203 transitions. [2021-06-05 13:45:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:16,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:16,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:16,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 13:45:16,478 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:16,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1614259528, now seen corresponding path program 61 times [2021-06-05 13:45:16,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:16,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690805416] [2021-06-05 13:45:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:16,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:16,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690805416] [2021-06-05 13:45:16,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690805416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747299679] [2021-06-05 13:45:16,546 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 [2021-06-05 13:45:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:16,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747299679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:16,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:16,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636164269] [2021-06-05 13:45:16,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:16,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:16,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:16,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:16,711 INFO L87 Difference]: Start difference. First operand 102 states and 203 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:16,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:16,912 INFO L93 Difference]: Finished difference Result 130 states and 252 transitions. [2021-06-05 13:45:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:16,913 INFO L225 Difference]: With dead ends: 130 [2021-06-05 13:45:16,913 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 13:45:16,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 13:45:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-06-05 13:45:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-06-05 13:45:16,914 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-06-05 13:45:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:16,915 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-06-05 13:45:16,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-06-05 13:45:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:16,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:16,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:17,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:17,118 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:17,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:17,118 INFO L82 PathProgramCache]: Analyzing trace with hash -601413940, now seen corresponding path program 62 times [2021-06-05 13:45:17,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:17,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772240881] [2021-06-05 13:45:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:17,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:17,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772240881] [2021-06-05 13:45:17,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772240881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:17,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508444555] [2021-06-05 13:45:17,191 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 [2021-06-05 13:45:17,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:17,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:17,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:17,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:17,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508444555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:17,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:17,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:17,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201712601] [2021-06-05 13:45:17,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:17,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:17,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:17,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:17,351 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:17,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:17,681 INFO L93 Difference]: Finished difference Result 174 states and 336 transitions. [2021-06-05 13:45:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:17,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:17,682 INFO L225 Difference]: With dead ends: 174 [2021-06-05 13:45:17,682 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 13:45:17,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:17,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 13:45:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2021-06-05 13:45:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-06-05 13:45:17,684 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-06-05 13:45:17,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:17,684 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-06-05 13:45:17,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-06-05 13:45:17,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:17,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:17,684 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:17,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 13:45:17,900 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:17,900 INFO L82 PathProgramCache]: Analyzing trace with hash -585953144, now seen corresponding path program 63 times [2021-06-05 13:45:17,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:17,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195472848] [2021-06-05 13:45:17,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:17,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:17,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195472848] [2021-06-05 13:45:17,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195472848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:17,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335796460] [2021-06-05 13:45:17,970 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 [2021-06-05 13:45:17,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:45:17,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:17,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:17,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:18,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335796460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:18,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:18,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:18,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642164967] [2021-06-05 13:45:18,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:18,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:18,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:18,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:18,130 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:18,412 INFO L93 Difference]: Finished difference Result 164 states and 323 transitions. [2021-06-05 13:45:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:18,413 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:18,413 INFO L225 Difference]: With dead ends: 164 [2021-06-05 13:45:18,413 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 13:45:18,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 283.5ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 13:45:18,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2021-06-05 13:45:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:18,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-06-05 13:45:18,415 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 17 [2021-06-05 13:45:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:18,415 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-06-05 13:45:18,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:18,415 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-06-05 13:45:18,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:18,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:18,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:18,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 13:45:18,625 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:18,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1544756820, now seen corresponding path program 64 times [2021-06-05 13:45:18,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:18,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090715126] [2021-06-05 13:45:18,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:18,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:18,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090715126] [2021-06-05 13:45:18,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090715126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:18,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902985281] [2021-06-05 13:45:18,694 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 [2021-06-05 13:45:18,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:18,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:18,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:18,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902985281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:18,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:18,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:18,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137313170] [2021-06-05 13:45:18,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:18,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:18,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:18,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:18,845 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:19,097 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-06-05 13:45:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:19,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:19,098 INFO L225 Difference]: With dead ends: 172 [2021-06-05 13:45:19,098 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 13:45:19,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 13:45:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 105. [2021-06-05 13:45:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-06-05 13:45:19,100 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-06-05 13:45:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:19,100 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-06-05 13:45:19,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-06-05 13:45:19,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:19,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:19,100 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:19,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 13:45:19,305 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:19,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1560217616, now seen corresponding path program 65 times [2021-06-05 13:45:19,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:19,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912741281] [2021-06-05 13:45:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:19,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:19,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912741281] [2021-06-05 13:45:19,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912741281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:19,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262516120] [2021-06-05 13:45:19,389 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 [2021-06-05 13:45:19,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:45:19,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:19,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:19,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262516120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:19,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:19,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:19,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963925556] [2021-06-05 13:45:19,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:19,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:19,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:19,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:19,546 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:19,783 INFO L93 Difference]: Finished difference Result 186 states and 358 transitions. [2021-06-05 13:45:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:19,784 INFO L225 Difference]: With dead ends: 186 [2021-06-05 13:45:19,784 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 13:45:19,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 13:45:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 104. [2021-06-05 13:45:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-06-05 13:45:19,785 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-06-05 13:45:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:19,785 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-06-05 13:45:19,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-06-05 13:45:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:19,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:19,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:19,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:19,993 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:19,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:19,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2131672422, now seen corresponding path program 66 times [2021-06-05 13:45:19,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:19,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868454810] [2021-06-05 13:45:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:20,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:20,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868454810] [2021-06-05 13:45:20,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868454810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:20,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263215043] [2021-06-05 13:45:20,061 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 [2021-06-05 13:45:20,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:20,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:20,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:20,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263215043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:20,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:20,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:20,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940441963] [2021-06-05 13:45:20,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:20,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:20,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:20,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:20,239 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:20,485 INFO L93 Difference]: Finished difference Result 143 states and 276 transitions. [2021-06-05 13:45:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:20,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:20,486 INFO L225 Difference]: With dead ends: 143 [2021-06-05 13:45:20,486 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 13:45:20,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 13:45:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2021-06-05 13:45:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.0) internal successors, (200), 100 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 200 transitions. [2021-06-05 13:45:20,487 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 200 transitions. Word has length 17 [2021-06-05 13:45:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:20,487 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 200 transitions. [2021-06-05 13:45:20,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:20,488 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 200 transitions. [2021-06-05 13:45:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:20,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:20,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:20,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:20,703 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:20,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1794909488, now seen corresponding path program 67 times [2021-06-05 13:45:20,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:20,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930999801] [2021-06-05 13:45:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:20,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:20,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930999801] [2021-06-05 13:45:20,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930999801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:20,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747733331] [2021-06-05 13:45:20,770 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 [2021-06-05 13:45:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:20,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:20,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:20,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747733331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:20,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:20,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:20,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409988365] [2021-06-05 13:45:20,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:20,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:20,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:20,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:20,942 INFO L87 Difference]: Start difference. First operand 101 states and 200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:21,087 INFO L93 Difference]: Finished difference Result 111 states and 213 transitions. [2021-06-05 13:45:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:45:21,087 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:21,087 INFO L225 Difference]: With dead ends: 111 [2021-06-05 13:45:21,087 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 13:45:21,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 13:45:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-06-05 13:45:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-06-05 13:45:21,089 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-06-05 13:45:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:21,089 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-06-05 13:45:21,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-06-05 13:45:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:21,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:21,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:21,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:21,300 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:21,300 INFO L82 PathProgramCache]: Analyzing trace with hash 284384340, now seen corresponding path program 68 times [2021-06-05 13:45:21,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:21,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870222738] [2021-06-05 13:45:21,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:21,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870222738] [2021-06-05 13:45:21,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870222738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585455190] [2021-06-05 13:45:21,373 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 [2021-06-05 13:45:21,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:21,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:21,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585455190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:21,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:21,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:21,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924500781] [2021-06-05 13:45:21,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:21,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:21,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:21,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:21,537 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:21,864 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-06-05 13:45:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:21,864 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:21,865 INFO L225 Difference]: With dead ends: 144 [2021-06-05 13:45:21,865 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 13:45:21,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 13:45:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-06-05 13:45:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:21,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-06-05 13:45:21,867 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-06-05 13:45:21,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:21,867 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-06-05 13:45:21,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-06-05 13:45:21,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:21,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:21,867 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:22,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 13:45:22,073 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash 299845136, now seen corresponding path program 69 times [2021-06-05 13:45:22,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:22,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886577783] [2021-06-05 13:45:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:22,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:22,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886577783] [2021-06-05 13:45:22,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886577783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:22,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750905563] [2021-06-05 13:45:22,159 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 [2021-06-05 13:45:22,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:45:22,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:22,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750905563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:22,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:22,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:22,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219555333] [2021-06-05 13:45:22,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:22,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:22,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:22,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:22,326 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:22,546 INFO L93 Difference]: Finished difference Result 139 states and 270 transitions. [2021-06-05 13:45:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:22,547 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:22,547 INFO L225 Difference]: With dead ends: 139 [2021-06-05 13:45:22,547 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 13:45:22,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 13:45:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2021-06-05 13:45:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 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) [2021-06-05 13:45:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 189 transitions. [2021-06-05 13:45:22,549 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 189 transitions. Word has length 17 [2021-06-05 13:45:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:22,549 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 189 transitions. [2021-06-05 13:45:22,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 189 transitions. [2021-06-05 13:45:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:22,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:22,549 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:22,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:22,761 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:22,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:22,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1864412196, now seen corresponding path program 70 times [2021-06-05 13:45:22,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:22,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50787841] [2021-06-05 13:45:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:22,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:22,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50787841] [2021-06-05 13:45:22,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50787841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:22,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851295267] [2021-06-05 13:45:22,832 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 [2021-06-05 13:45:22,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:22,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:22,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:22,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851295267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:22,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:22,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:22,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261979649] [2021-06-05 13:45:22,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:22,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:22,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:22,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:22,998 INFO L87 Difference]: Start difference. First operand 96 states and 189 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:23,245 INFO L93 Difference]: Finished difference Result 140 states and 268 transitions. [2021-06-05 13:45:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:23,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:23,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:23,245 INFO L225 Difference]: With dead ends: 140 [2021-06-05 13:45:23,246 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 13:45:23,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 13:45:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2021-06-05 13:45:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-06-05 13:45:23,247 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-06-05 13:45:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:23,247 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-06-05 13:45:23,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:23,247 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-06-05 13:45:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:23,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:23,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:23,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:23,448 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1848951400, now seen corresponding path program 71 times [2021-06-05 13:45:23,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:23,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859429229] [2021-06-05 13:45:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:23,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:23,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859429229] [2021-06-05 13:45:23,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859429229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:23,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316906516] [2021-06-05 13:45:23,521 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 [2021-06-05 13:45:23,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:45:23,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:23,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:23,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:23,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316906516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:23,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:23,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:23,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421933092] [2021-06-05 13:45:23,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:23,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:23,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:23,680 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:23,882 INFO L93 Difference]: Finished difference Result 151 states and 289 transitions. [2021-06-05 13:45:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:23,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:23,882 INFO L225 Difference]: With dead ends: 151 [2021-06-05 13:45:23,882 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 13:45:23,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 13:45:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2021-06-05 13:45:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-06-05 13:45:23,884 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-06-05 13:45:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:23,884 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-06-05 13:45:23,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-06-05 13:45:23,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:23,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:23,884 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:24,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 13:45:24,085 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1277496594, now seen corresponding path program 72 times [2021-06-05 13:45:24,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:24,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886770914] [2021-06-05 13:45:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:24,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:24,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886770914] [2021-06-05 13:45:24,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886770914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:24,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255311775] [2021-06-05 13:45:24,152 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 [2021-06-05 13:45:24,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:24,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:24,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:24,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:24,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255311775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:24,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:24,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:24,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003655546] [2021-06-05 13:45:24,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:24,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:24,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:24,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:24,319 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:24,506 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-06-05 13:45:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:24,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:24,507 INFO L225 Difference]: With dead ends: 124 [2021-06-05 13:45:24,507 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 13:45:24,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 13:45:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-06-05 13:45:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-06-05 13:45:24,509 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-06-05 13:45:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:24,509 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-06-05 13:45:24,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-06-05 13:45:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:24,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:24,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:24,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 13:45:24,709 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:24,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1336463512, now seen corresponding path program 73 times [2021-06-05 13:45:24,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:24,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297733853] [2021-06-05 13:45:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:24,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:24,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297733853] [2021-06-05 13:45:24,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297733853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:24,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100334548] [2021-06-05 13:45:24,782 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 [2021-06-05 13:45:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:24,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:24,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:24,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100334548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:24,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:24,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:24,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167455146] [2021-06-05 13:45:24,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:24,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:24,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:24,944 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:25,218 INFO L93 Difference]: Finished difference Result 157 states and 300 transitions. [2021-06-05 13:45:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:25,219 INFO L225 Difference]: With dead ends: 157 [2021-06-05 13:45:25,219 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 13:45:25,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 13:45:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2021-06-05 13:45:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-05 13:45:25,221 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-05 13:45:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:25,221 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-05 13:45:25,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-05 13:45:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:25,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:25,221 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:25,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:25,433 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:25,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1351924308, now seen corresponding path program 74 times [2021-06-05 13:45:25,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:25,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666355242] [2021-06-05 13:45:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:25,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:25,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666355242] [2021-06-05 13:45:25,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666355242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:25,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011621490] [2021-06-05 13:45:25,501 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 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 [2021-06-05 13:45:25,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:25,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011621490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:25,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:25,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:25,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653053806] [2021-06-05 13:45:25,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:25,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:25,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:25,665 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:25,995 INFO L93 Difference]: Finished difference Result 169 states and 323 transitions. [2021-06-05 13:45:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:25,996 INFO L225 Difference]: With dead ends: 169 [2021-06-05 13:45:25,996 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 13:45:25,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 13:45:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2021-06-05 13:45:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 190 transitions. [2021-06-05 13:45:25,998 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 190 transitions. Word has length 17 [2021-06-05 13:45:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:25,998 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 190 transitions. [2021-06-05 13:45:25,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:25,998 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 190 transitions. [2021-06-05 13:45:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:25,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:25,998 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:26,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:26,203 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:26,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1923379114, now seen corresponding path program 75 times [2021-06-05 13:45:26,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:26,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513599280] [2021-06-05 13:45:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:26,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:26,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513599280] [2021-06-05 13:45:26,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513599280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:26,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954249491] [2021-06-05 13:45:26,269 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 [2021-06-05 13:45:26,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:45:26,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:26,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:26,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:26,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954249491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:26,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:26,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:26,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113784213] [2021-06-05 13:45:26,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:26,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:26,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:26,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:26,431 INFO L87 Difference]: Start difference. First operand 96 states and 190 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:26,722 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-06-05 13:45:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:26,722 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:26,723 INFO L225 Difference]: With dead ends: 141 [2021-06-05 13:45:26,723 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 13:45:26,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 13:45:26,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2021-06-05 13:45:26,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-06-05 13:45:26,724 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-06-05 13:45:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:26,724 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-06-05 13:45:26,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-06-05 13:45:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:26,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:26,725 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:26,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:26,925 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:26,925 INFO L82 PathProgramCache]: Analyzing trace with hash 762400792, now seen corresponding path program 4 times [2021-06-05 13:45:26,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:26,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443875626] [2021-06-05 13:45:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:26,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:26,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443875626] [2021-06-05 13:45:26,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443875626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:26,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799133673] [2021-06-05 13:45:26,992 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:27,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:27,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:27,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:45:27,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:27,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799133673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:27,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:27,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 13:45:27,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523238224] [2021-06-05 13:45:27,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:27,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:27,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:27,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:27,077 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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) [2021-06-05 13:45:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:27,221 INFO L93 Difference]: Finished difference Result 130 states and 253 transitions. [2021-06-05 13:45:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:45:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 17 [2021-06-05 13:45:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:27,222 INFO L225 Difference]: With dead ends: 130 [2021-06-05 13:45:27,222 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 13:45:27,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:27,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 13:45:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-06-05 13:45:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-06-05 13:45:27,223 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 17 [2021-06-05 13:45:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:27,224 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-06-05 13:45:27,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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) [2021-06-05 13:45:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-06-05 13:45:27,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:45:27,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:27,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:27,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:27,439 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:27,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:27,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1385523536, now seen corresponding path program 76 times [2021-06-05 13:45:27,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:27,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519293600] [2021-06-05 13:45:27,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:27,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:27,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519293600] [2021-06-05 13:45:27,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519293600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:27,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169511013] [2021-06-05 13:45:27,509 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:27,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:27,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:27,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:45:27,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:27,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169511013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:27,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:27,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:45:27,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937625931] [2021-06-05 13:45:27,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:27,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:27,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:27,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:27,687 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:28,048 INFO L93 Difference]: Finished difference Result 153 states and 289 transitions. [2021-06-05 13:45:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:28,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:45:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:28,049 INFO L225 Difference]: With dead ends: 153 [2021-06-05 13:45:28,049 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 13:45:28,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 13:45:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 100. [2021-06-05 13:45:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 197 transitions. [2021-06-05 13:45:28,051 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 197 transitions. Word has length 17 [2021-06-05 13:45:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:28,051 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 197 transitions. [2021-06-05 13:45:28,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:45:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 197 transitions. [2021-06-05 13:45:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:28,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:28,051 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:28,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:28,267 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:28,267 INFO L82 PathProgramCache]: Analyzing trace with hash 255431194, now seen corresponding path program 4 times [2021-06-05 13:45:28,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:28,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387353779] [2021-06-05 13:45:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:28,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:28,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387353779] [2021-06-05 13:45:28,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387353779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:28,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808373899] [2021-06-05 13:45:28,343 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:28,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:28,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:28,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:45:28,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:28,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808373899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:28,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:28,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:45:28,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881715597] [2021-06-05 13:45:28,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:45:28,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:28,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:45:28,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:28,458 INFO L87 Difference]: Start difference. First operand 100 states and 197 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-06-05 13:45:28,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:28,662 INFO L93 Difference]: Finished difference Result 132 states and 257 transitions. [2021-06-05 13:45:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:45:28,662 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 19 [2021-06-05 13:45:28,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:28,662 INFO L225 Difference]: With dead ends: 132 [2021-06-05 13:45:28,663 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 13:45:28,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:45:28,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 13:45:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2021-06-05 13:45:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-06-05 13:45:28,664 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-06-05 13:45:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:28,664 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-06-05 13:45:28,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-06-05 13:45:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-06-05 13:45:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:28,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:28,665 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:28,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 13:45:28,880 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:28,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:28,880 INFO L82 PathProgramCache]: Analyzing trace with hash -2015204966, now seen corresponding path program 77 times [2021-06-05 13:45:28,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:28,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828328875] [2021-06-05 13:45:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:28,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:28,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828328875] [2021-06-05 13:45:28,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828328875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:28,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115779218] [2021-06-05 13:45:28,965 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:28,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:28,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:28,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:29,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115779218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:29,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:29,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:29,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730099702] [2021-06-05 13:45:29,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:29,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:29,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:29,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:29,152 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:29,437 INFO L93 Difference]: Finished difference Result 136 states and 260 transitions. [2021-06-05 13:45:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:29,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:29,437 INFO L225 Difference]: With dead ends: 136 [2021-06-05 13:45:29,437 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 13:45:29,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 13:45:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2021-06-05 13:45:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-06-05 13:45:29,439 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-06-05 13:45:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:29,439 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-06-05 13:45:29,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-06-05 13:45:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:29,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:29,439 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:29,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:29,640 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:29,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1897041942, now seen corresponding path program 78 times [2021-06-05 13:45:29,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:29,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422078635] [2021-06-05 13:45:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:29,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:29,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422078635] [2021-06-05 13:45:29,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422078635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:29,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622085189] [2021-06-05 13:45:29,729 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:29,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:45:29,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:29,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:29,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:29,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622085189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:29,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:29,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:29,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523398561] [2021-06-05 13:45:29,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:29,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:29,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:29,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:29,912 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:30,211 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-06-05 13:45:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:30,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:30,212 INFO L225 Difference]: With dead ends: 141 [2021-06-05 13:45:30,212 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 13:45:30,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:30,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 13:45:30,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-06-05 13:45:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-06-05 13:45:30,213 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-06-05 13:45:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:30,213 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-06-05 13:45:30,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-06-05 13:45:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:30,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:30,214 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:30,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 13:45:30,424 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:30,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:30,425 INFO L82 PathProgramCache]: Analyzing trace with hash -318631526, now seen corresponding path program 79 times [2021-06-05 13:45:30,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:30,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59175072] [2021-06-05 13:45:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:30,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:30,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59175072] [2021-06-05 13:45:30,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59175072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:30,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504721133] [2021-06-05 13:45:30,525 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:30,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:30,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:30,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504721133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:30,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:30,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:30,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504423252] [2021-06-05 13:45:30,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:30,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:30,716 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:31,009 INFO L93 Difference]: Finished difference Result 167 states and 318 transitions. [2021-06-05 13:45:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:31,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:31,010 INFO L225 Difference]: With dead ends: 167 [2021-06-05 13:45:31,010 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 13:45:31,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:31,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 13:45:31,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2021-06-05 13:45:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-06-05 13:45:31,012 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-06-05 13:45:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:31,012 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-06-05 13:45:31,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-06-05 13:45:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:31,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:31,012 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:31,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 13:45:31,212 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:31,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:31,213 INFO L82 PathProgramCache]: Analyzing trace with hash -303170730, now seen corresponding path program 80 times [2021-06-05 13:45:31,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:31,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439519721] [2021-06-05 13:45:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:31,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:31,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439519721] [2021-06-05 13:45:31,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439519721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:31,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325009417] [2021-06-05 13:45:31,304 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:31,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:31,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:31,327 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:31,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:31,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325009417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:31,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:31,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:31,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656625981] [2021-06-05 13:45:31,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:31,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:31,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:31,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:31,511 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:31,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:31,877 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-06-05 13:45:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:31,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:31,877 INFO L225 Difference]: With dead ends: 150 [2021-06-05 13:45:31,877 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 13:45:31,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 13:45:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 103. [2021-06-05 13:45:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 204 transitions. [2021-06-05 13:45:31,879 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 204 transitions. Word has length 19 [2021-06-05 13:45:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:31,879 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 204 transitions. [2021-06-05 13:45:31,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 204 transitions. [2021-06-05 13:45:31,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:31,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:31,879 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:32,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:32,087 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:32,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1454735530, now seen corresponding path program 81 times [2021-06-05 13:45:32,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:32,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545926279] [2021-06-05 13:45:32,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:32,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:32,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545926279] [2021-06-05 13:45:32,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545926279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300035160] [2021-06-05 13:45:32,173 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:32,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:32,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:32,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:32,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:32,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300035160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:32,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:32,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372819704] [2021-06-05 13:45:32,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:32,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:32,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:32,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:32,353 INFO L87 Difference]: Start difference. First operand 103 states and 204 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:32,655 INFO L93 Difference]: Finished difference Result 158 states and 304 transitions. [2021-06-05 13:45:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:32,656 INFO L225 Difference]: With dead ends: 158 [2021-06-05 13:45:32,656 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 13:45:32,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 13:45:32,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2021-06-05 13:45:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-06-05 13:45:32,657 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-06-05 13:45:32,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:32,658 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-06-05 13:45:32,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:32,658 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-06-05 13:45:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:32,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:32,658 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:32,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:32,858 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:32,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1439274734, now seen corresponding path program 82 times [2021-06-05 13:45:32,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:32,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849703808] [2021-06-05 13:45:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:32,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:32,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849703808] [2021-06-05 13:45:32,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849703808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599442176] [2021-06-05 13:45:32,944 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:32,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:32,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:32,964 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:32,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:33,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599442176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:33,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:33,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:33,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791629763] [2021-06-05 13:45:33,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:33,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:33,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:33,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:33,137 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:33,459 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-05 13:45:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:33,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:33,460 INFO L225 Difference]: With dead ends: 160 [2021-06-05 13:45:33,460 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 13:45:33,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 342.1ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 13:45:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-06-05 13:45:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-06-05 13:45:33,462 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-06-05 13:45:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:33,462 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-06-05 13:45:33,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-06-05 13:45:33,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:33,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:33,462 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:33,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:33,663 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash -867819928, now seen corresponding path program 83 times [2021-06-05 13:45:33,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:33,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568485480] [2021-06-05 13:45:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:33,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:33,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568485480] [2021-06-05 13:45:33,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568485480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:33,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730908682] [2021-06-05 13:45:33,754 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:33,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:33,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:33,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:33,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:33,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730908682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:33,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:33,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:33,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698420798] [2021-06-05 13:45:33,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:33,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:33,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:33,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:33,970 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:34,177 INFO L93 Difference]: Finished difference Result 127 states and 246 transitions. [2021-06-05 13:45:34,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:34,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:34,178 INFO L225 Difference]: With dead ends: 127 [2021-06-05 13:45:34,178 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 13:45:34,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 13:45:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2021-06-05 13:45:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-06-05 13:45:34,179 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-06-05 13:45:34,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:34,179 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-06-05 13:45:34,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-06-05 13:45:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:34,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:34,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:34,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:34,397 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:34,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2041798938, now seen corresponding path program 84 times [2021-06-05 13:45:34,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:34,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962321151] [2021-06-05 13:45:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:34,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:34,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962321151] [2021-06-05 13:45:34,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962321151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:34,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287141306] [2021-06-05 13:45:34,479 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:34,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:34,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:34,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:34,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:34,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287141306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:34,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:34,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:34,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949248863] [2021-06-05 13:45:34,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:34,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:34,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:34,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:34,702 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:34,874 INFO L93 Difference]: Finished difference Result 125 states and 240 transitions. [2021-06-05 13:45:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:34,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:34,875 INFO L225 Difference]: With dead ends: 125 [2021-06-05 13:45:34,875 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 13:45:34,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 255.1ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 13:45:34,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2021-06-05 13:45:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-06-05 13:45:34,877 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 19 [2021-06-05 13:45:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:34,877 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-06-05 13:45:34,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:34,877 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-06-05 13:45:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:34,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:34,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:35,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:35,085 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash -499434542, now seen corresponding path program 85 times [2021-06-05 13:45:35,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:35,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709101449] [2021-06-05 13:45:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:35,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:35,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709101449] [2021-06-05 13:45:35,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709101449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:35,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027851891] [2021-06-05 13:45:35,169 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:35,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:35,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027851891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:35,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:35,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:35,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582037461] [2021-06-05 13:45:35,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:35,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:35,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:35,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:35,357 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:35,707 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-06-05 13:45:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:35,707 INFO L225 Difference]: With dead ends: 137 [2021-06-05 13:45:35,708 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 13:45:35,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:35,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 13:45:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2021-06-05 13:45:35,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-06-05 13:45:35,709 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-06-05 13:45:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:35,709 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-06-05 13:45:35,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-06-05 13:45:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:35,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:35,710 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:35,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:35,921 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:35,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859286, now seen corresponding path program 86 times [2021-06-05 13:45:35,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:35,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672347173] [2021-06-05 13:45:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:36,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:36,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672347173] [2021-06-05 13:45:36,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672347173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948687358] [2021-06-05 13:45:36,008 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:45:36,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:36,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:36,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:36,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948687358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:36,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:36,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315285008] [2021-06-05 13:45:36,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:36,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:36,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:36,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:36,230 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:36,635 INFO L93 Difference]: Finished difference Result 192 states and 369 transitions. [2021-06-05 13:45:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:36,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:36,636 INFO L225 Difference]: With dead ends: 192 [2021-06-05 13:45:36,636 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 13:45:36,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 447.8ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 13:45:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 108. [2021-06-05 13:45:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-06-05 13:45:36,638 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-06-05 13:45:36,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:36,638 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-06-05 13:45:36,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-06-05 13:45:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:36,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:36,638 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:36,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:36,839 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:36,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:36,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1595320082, now seen corresponding path program 87 times [2021-06-05 13:45:36,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:36,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331306064] [2021-06-05 13:45:36,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:36,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:36,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331306064] [2021-06-05 13:45:36,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331306064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543916176] [2021-06-05 13:45:36,930 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:36,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:36,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:36,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:36,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:37,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543916176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:37,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:37,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:37,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362105814] [2021-06-05 13:45:37,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:37,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:37,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:37,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:37,130 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:37,572 INFO L93 Difference]: Finished difference Result 176 states and 346 transitions. [2021-06-05 13:45:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:37,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:37,572 INFO L225 Difference]: With dead ends: 176 [2021-06-05 13:45:37,573 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 13:45:37,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 13:45:37,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 106. [2021-06-05 13:45:37,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-06-05 13:45:37,574 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 19 [2021-06-05 13:45:37,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:37,574 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-06-05 13:45:37,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-06-05 13:45:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:37,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:37,575 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:37,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:37,775 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:37,775 INFO L82 PathProgramCache]: Analyzing trace with hash -568937250, now seen corresponding path program 88 times [2021-06-05 13:45:37,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:37,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129710155] [2021-06-05 13:45:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:37,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:37,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129710155] [2021-06-05 13:45:37,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129710155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:37,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324216500] [2021-06-05 13:45:37,871 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:37,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:37,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:38,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324216500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:38,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:38,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:38,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707483672] [2021-06-05 13:45:38,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:38,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:38,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:38,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:38,050 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:38,490 INFO L93 Difference]: Finished difference Result 198 states and 383 transitions. [2021-06-05 13:45:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:45:38,490 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:38,491 INFO L225 Difference]: With dead ends: 198 [2021-06-05 13:45:38,491 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 13:45:38,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 402.4ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 13:45:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2021-06-05 13:45:38,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-06-05 13:45:38,493 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-06-05 13:45:38,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:38,493 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-06-05 13:45:38,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:38,493 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-06-05 13:45:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:38,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:38,493 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:38,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 13:45:38,693 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:38,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:38,694 INFO L82 PathProgramCache]: Analyzing trace with hash -553476454, now seen corresponding path program 89 times [2021-06-05 13:45:38,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:38,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826329509] [2021-06-05 13:45:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:38,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:38,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826329509] [2021-06-05 13:45:38,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826329509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:38,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138048947] [2021-06-05 13:45:38,786 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:38,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:38,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:38,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:38,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:38,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138048947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:38,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:38,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:38,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40206626] [2021-06-05 13:45:38,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:38,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:38,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:38,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:38,998 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:39,482 INFO L93 Difference]: Finished difference Result 209 states and 402 transitions. [2021-06-05 13:45:39,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:45:39,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:39,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:39,483 INFO L225 Difference]: With dead ends: 209 [2021-06-05 13:45:39,483 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 13:45:39,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:45:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 13:45:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 107. [2021-06-05 13:45:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-06-05 13:45:39,484 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-06-05 13:45:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:39,485 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-06-05 13:45:39,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-06-05 13:45:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:39,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:39,485 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:39,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:39,700 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:39,700 INFO L82 PathProgramCache]: Analyzing trace with hash 17978352, now seen corresponding path program 90 times [2021-06-05 13:45:39,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:39,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602951695] [2021-06-05 13:45:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:39,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:39,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602951695] [2021-06-05 13:45:39,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602951695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:39,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763431099] [2021-06-05 13:45:39,779 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:39,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:45:39,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:39,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:39,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:39,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763431099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:39,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:39,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:39,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008912721] [2021-06-05 13:45:39,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:39,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:39,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:39,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:39,982 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:40,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:40,359 INFO L93 Difference]: Finished difference Result 156 states and 301 transitions. [2021-06-05 13:45:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:45:40,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:40,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:40,360 INFO L225 Difference]: With dead ends: 156 [2021-06-05 13:45:40,360 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 13:45:40,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 13:45:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 105. [2021-06-05 13:45:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.019230769230769) internal successors, (210), 104 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 210 transitions. [2021-06-05 13:45:40,362 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 210 transitions. Word has length 19 [2021-06-05 13:45:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:40,362 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 210 transitions. [2021-06-05 13:45:40,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 210 transitions. [2021-06-05 13:45:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:40,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:40,362 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:40,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:40,563 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:40,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1663028838, now seen corresponding path program 91 times [2021-06-05 13:45:40,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:40,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312472804] [2021-06-05 13:45:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:40,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:40,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312472804] [2021-06-05 13:45:40,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312472804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:40,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130415655] [2021-06-05 13:45:40,644 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:40,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:40,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:40,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130415655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:40,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:40,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:40,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300699725] [2021-06-05 13:45:40,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:40,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:40,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:40,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:40,833 INFO L87 Difference]: Start difference. First operand 105 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:41,404 INFO L93 Difference]: Finished difference Result 231 states and 445 transitions. [2021-06-05 13:45:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:45:41,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:41,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:41,405 INFO L225 Difference]: With dead ends: 231 [2021-06-05 13:45:41,405 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 13:45:41,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 409.0ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:45:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 13:45:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 108. [2021-06-05 13:45:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-05 13:45:41,407 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-05 13:45:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:41,407 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-05 13:45:41,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-05 13:45:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:41,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:41,407 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:41,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 13:45:41,622 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:41,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:41,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1647568042, now seen corresponding path program 92 times [2021-06-05 13:45:41,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:41,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856471225] [2021-06-05 13:45:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:41,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:41,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856471225] [2021-06-05 13:45:41,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856471225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:41,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900660841] [2021-06-05 13:45:41,712 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:41,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:41,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:41,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:41,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900660841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:41,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:41,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:41,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023562511] [2021-06-05 13:45:41,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:41,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:41,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:41,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:41,890 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:42,482 INFO L93 Difference]: Finished difference Result 245 states and 469 transitions. [2021-06-05 13:45:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:45:42,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:42,483 INFO L225 Difference]: With dead ends: 245 [2021-06-05 13:45:42,483 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 13:45:42,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:45:42,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 13:45:42,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 107. [2021-06-05 13:45:42,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-06-05 13:45:42,485 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-06-05 13:45:42,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:42,485 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-06-05 13:45:42,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-06-05 13:45:42,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:42,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:42,485 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:42,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 13:45:42,689 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:42,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:42,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1076113236, now seen corresponding path program 93 times [2021-06-05 13:45:42,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:42,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495760249] [2021-06-05 13:45:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:42,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:42,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495760249] [2021-06-05 13:45:42,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495760249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:42,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674088005] [2021-06-05 13:45:42,777 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:45:42,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:42,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:42,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:42,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:43,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674088005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:43,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:43,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:43,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707516938] [2021-06-05 13:45:43,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:43,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:43,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:43,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:43,009 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:43,469 INFO L93 Difference]: Finished difference Result 193 states and 368 transitions. [2021-06-05 13:45:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:45:43,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:43,470 INFO L225 Difference]: With dead ends: 193 [2021-06-05 13:45:43,470 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 13:45:43,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:45:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 13:45:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 106. [2021-06-05 13:45:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-05 13:45:43,472 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-06-05 13:45:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:43,472 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-05 13:45:43,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-05 13:45:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:43,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:43,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:43,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 13:45:43,685 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash 361302298, now seen corresponding path program 94 times [2021-06-05 13:45:43,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:43,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615093465] [2021-06-05 13:45:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:43,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:43,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615093465] [2021-06-05 13:45:43,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615093465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:43,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978552521] [2021-06-05 13:45:43,772 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:43,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:43,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:43,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:43,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:44,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978552521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:44,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:44,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:44,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43177338] [2021-06-05 13:45:44,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:44,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:44,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:44,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:44,011 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:44,241 INFO L93 Difference]: Finished difference Result 142 states and 271 transitions. [2021-06-05 13:45:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:44,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:44,241 INFO L225 Difference]: With dead ends: 142 [2021-06-05 13:45:44,241 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 13:45:44,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 13:45:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-06-05 13:45:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-05 13:45:44,243 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-06-05 13:45:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:44,243 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-05 13:45:44,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-05 13:45:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:44,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:44,243 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:44,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 13:45:44,459 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:44,459 INFO L82 PathProgramCache]: Analyzing trace with hash -21418090, now seen corresponding path program 95 times [2021-06-05 13:45:44,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:44,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498571276] [2021-06-05 13:45:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:44,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:44,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498571276] [2021-06-05 13:45:44,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498571276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:44,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510339078] [2021-06-05 13:45:44,538 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:44,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:45:44,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:44,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:44,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510339078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:44,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:44,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:44,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945386912] [2021-06-05 13:45:44,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:44,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:44,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:44,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:44,758 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:44,954 INFO L93 Difference]: Finished difference Result 139 states and 267 transitions. [2021-06-05 13:45:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:44,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:44,954 INFO L225 Difference]: With dead ends: 139 [2021-06-05 13:45:44,954 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 13:45:44,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 13:45:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-06-05 13:45:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-06-05 13:45:44,956 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-06-05 13:45:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:44,956 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-06-05 13:45:44,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:44,956 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-06-05 13:45:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:44,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:44,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:45,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 13:45:45,172 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:45,172 INFO L82 PathProgramCache]: Analyzing trace with hash 2057875738, now seen corresponding path program 96 times [2021-06-05 13:45:45,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:45,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668984221] [2021-06-05 13:45:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:45,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:45,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668984221] [2021-06-05 13:45:45,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668984221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:45,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799463311] [2021-06-05 13:45:45,256 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:45,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:45,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:45,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:45,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799463311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:45,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:45,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:45,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926047947] [2021-06-05 13:45:45,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:45,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:45,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:45,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:45,468 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:45,765 INFO L93 Difference]: Finished difference Result 165 states and 315 transitions. [2021-06-05 13:45:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:45,766 INFO L225 Difference]: With dead ends: 165 [2021-06-05 13:45:45,766 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 13:45:45,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 13:45:45,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2021-06-05 13:45:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-05 13:45:45,767 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-05 13:45:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:45,767 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-05 13:45:45,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-05 13:45:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:45,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:45,768 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:45,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 13:45:45,973 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:45,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2073336534, now seen corresponding path program 97 times [2021-06-05 13:45:45,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:45,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632893629] [2021-06-05 13:45:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:46,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:46,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632893629] [2021-06-05 13:45:46,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632893629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154076323] [2021-06-05 13:45:46,061 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:46,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:46,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:46,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154076323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:46,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:46,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590626332] [2021-06-05 13:45:46,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:46,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:46,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:46,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:46,270 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:46,500 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-06-05 13:45:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:46,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:46,501 INFO L225 Difference]: With dead ends: 152 [2021-06-05 13:45:46,501 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 13:45:46,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:46,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 13:45:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-06-05 13:45:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-05 13:45:46,503 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-06-05 13:45:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:46,503 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-05 13:45:46,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-05 13:45:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:46,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:46,503 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:46,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 13:45:46,705 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:46,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1613968814, now seen corresponding path program 98 times [2021-06-05 13:45:46,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:46,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152744583] [2021-06-05 13:45:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:46,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:46,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152744583] [2021-06-05 13:45:46,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152744583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295786927] [2021-06-05 13:45:46,786 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:46,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:46,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:46,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295786927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:46,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:46,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069347902] [2021-06-05 13:45:46,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:46,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:46,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:46,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:46,981 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:47,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:47,328 INFO L93 Difference]: Finished difference Result 186 states and 349 transitions. [2021-06-05 13:45:47,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:47,329 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:47,329 INFO L225 Difference]: With dead ends: 186 [2021-06-05 13:45:47,329 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 13:45:47,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 13:45:47,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 105. [2021-06-05 13:45:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-06-05 13:45:47,331 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-06-05 13:45:47,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:47,331 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-06-05 13:45:47,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-06-05 13:45:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:47,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:47,331 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:47,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:47,541 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1757683798, now seen corresponding path program 99 times [2021-06-05 13:45:47,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:47,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652297784] [2021-06-05 13:45:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:47,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:47,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652297784] [2021-06-05 13:45:47,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652297784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:47,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614213070] [2021-06-05 13:45:47,624 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:47,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:47,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:47,645 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:47,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:47,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614213070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:47,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:47,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:47,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144360334] [2021-06-05 13:45:47,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:47,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:47,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:47,803 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:48,642 INFO L93 Difference]: Finished difference Result 286 states and 540 transitions. [2021-06-05 13:45:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 13:45:48,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:48,642 INFO L225 Difference]: With dead ends: 286 [2021-06-05 13:45:48,642 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 13:45:48,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 696.0ms TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:45:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 13:45:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2021-06-05 13:45:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-06-05 13:45:48,645 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-06-05 13:45:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:48,645 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-06-05 13:45:48,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:48,645 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-06-05 13:45:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:48,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:48,645 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:48,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 13:45:48,858 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:48,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1773144594, now seen corresponding path program 100 times [2021-06-05 13:45:48,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:48,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258826368] [2021-06-05 13:45:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:48,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:48,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258826368] [2021-06-05 13:45:48,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258826368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:48,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058142317] [2021-06-05 13:45:48,953 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:45:48,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:48,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:48,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:49,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058142317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:49,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:49,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:49,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140099963] [2021-06-05 13:45:49,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:49,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:49,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:49,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:49,160 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:50,102 INFO L93 Difference]: Finished difference Result 295 states and 558 transitions. [2021-06-05 13:45:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 13:45:50,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:50,103 INFO L225 Difference]: With dead ends: 295 [2021-06-05 13:45:50,103 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 13:45:50,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 760.5ms TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:45:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 13:45:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 108. [2021-06-05 13:45:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-05 13:45:50,105 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-05 13:45:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:50,105 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-05 13:45:50,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-05 13:45:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:50,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:50,105 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:50,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:50,306 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:50,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1950367896, now seen corresponding path program 101 times [2021-06-05 13:45:50,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:50,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402830275] [2021-06-05 13:45:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:50,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:50,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402830275] [2021-06-05 13:45:50,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402830275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:50,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054227880] [2021-06-05 13:45:50,386 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:50,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:50,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:50,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:50,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:50,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054227880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:50,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:50,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:50,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049592154] [2021-06-05 13:45:50,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:50,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:50,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:50,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:50,597 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:51,366 INFO L93 Difference]: Finished difference Result 223 states and 419 transitions. [2021-06-05 13:45:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:45:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:51,368 INFO L225 Difference]: With dead ends: 223 [2021-06-05 13:45:51,368 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 13:45:51,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 674.1ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:45:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 13:45:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 108. [2021-06-05 13:45:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-05 13:45:51,369 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-05 13:45:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:51,369 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-05 13:45:51,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-05 13:45:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:51,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:51,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:51,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 13:45:51,570 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:51,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:51,570 INFO L82 PathProgramCache]: Analyzing trace with hash -512952362, now seen corresponding path program 102 times [2021-06-05 13:45:51,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:51,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231810289] [2021-06-05 13:45:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:51,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:51,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231810289] [2021-06-05 13:45:51,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231810289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:51,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653004762] [2021-06-05 13:45:51,665 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:51,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:51,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:51,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:51,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653004762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:51,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:51,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:51,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779539612] [2021-06-05 13:45:51,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:51,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:51,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:51,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:51,877 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:52,084 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-06-05 13:45:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:52,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:52,084 INFO L225 Difference]: With dead ends: 146 [2021-06-05 13:45:52,084 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 13:45:52,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 13:45:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2021-06-05 13:45:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-06-05 13:45:52,086 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-06-05 13:45:52,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:52,086 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-06-05 13:45:52,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-06-05 13:45:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:52,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:52,086 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:52,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:52,287 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:52,287 INFO L82 PathProgramCache]: Analyzing trace with hash -895672750, now seen corresponding path program 103 times [2021-06-05 13:45:52,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:52,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903969391] [2021-06-05 13:45:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:52,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:52,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903969391] [2021-06-05 13:45:52,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903969391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:52,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934301486] [2021-06-05 13:45:52,372 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:52,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:52,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:52,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934301486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:52,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:52,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:52,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944753548] [2021-06-05 13:45:52,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:52,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:52,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:52,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:52,615 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:52,852 INFO L93 Difference]: Finished difference Result 151 states and 298 transitions. [2021-06-05 13:45:52,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:52,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:52,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:52,853 INFO L225 Difference]: With dead ends: 151 [2021-06-05 13:45:52,853 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 13:45:52,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 13:45:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-06-05 13:45:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-05 13:45:52,854 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-05 13:45:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:52,854 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-05 13:45:52,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-05 13:45:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:52,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:52,854 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:53,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 13:45:53,055 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:53,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:53,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1183621078, now seen corresponding path program 104 times [2021-06-05 13:45:53,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:53,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589362241] [2021-06-05 13:45:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:53,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:53,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589362241] [2021-06-05 13:45:53,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589362241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:53,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732950032] [2021-06-05 13:45:53,140 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:53,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:53,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:53,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:53,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732950032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:53,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:53,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:53,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124157033] [2021-06-05 13:45:53,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:53,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:53,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:53,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:53,367 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:53,673 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-06-05 13:45:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:53,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:53,674 INFO L225 Difference]: With dead ends: 176 [2021-06-05 13:45:53,674 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 13:45:53,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 13:45:53,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2021-06-05 13:45:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 111 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 235 transitions. [2021-06-05 13:45:53,676 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 235 transitions. Word has length 19 [2021-06-05 13:45:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:53,676 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 235 transitions. [2021-06-05 13:45:53,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 235 transitions. [2021-06-05 13:45:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:53,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:53,676 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:53,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 13:45:53,889 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:53,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:53,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1199081874, now seen corresponding path program 105 times [2021-06-05 13:45:53,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:53,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576649552] [2021-06-05 13:45:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:53,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:53,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576649552] [2021-06-05 13:45:53,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576649552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:53,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077341959] [2021-06-05 13:45:53,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:53,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:45:53,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:53,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:53,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:54,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077341959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:54,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:54,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:54,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220417647] [2021-06-05 13:45:54,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:54,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:54,199 INFO L87 Difference]: Start difference. First operand 112 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:54,525 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-06-05 13:45:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:54,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:54,525 INFO L225 Difference]: With dead ends: 163 [2021-06-05 13:45:54,525 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 13:45:54,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 13:45:54,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 110. [2021-06-05 13:45:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-06-05 13:45:54,527 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-06-05 13:45:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:54,527 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-06-05 13:45:54,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-06-05 13:45:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:54,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:54,527 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:54,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 13:45:54,728 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1806743822, now seen corresponding path program 106 times [2021-06-05 13:45:54,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:54,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467769636] [2021-06-05 13:45:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:54,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:54,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467769636] [2021-06-05 13:45:54,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467769636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:54,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975830245] [2021-06-05 13:45:54,807 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:54,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:54,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:54,827 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:45:54,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:54,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975830245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:54,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:54,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:54,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703362692] [2021-06-05 13:45:54,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:54,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:54,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:54,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:54,992 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:55,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:55,653 INFO L93 Difference]: Finished difference Result 236 states and 440 transitions. [2021-06-05 13:45:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:45:55,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:55,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:55,654 INFO L225 Difference]: With dead ends: 236 [2021-06-05 13:45:55,654 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 13:45:55,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 639.2ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:45:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 13:45:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 109. [2021-06-05 13:45:55,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-06-05 13:45:55,655 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-06-05 13:45:55,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:55,655 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-06-05 13:45:55,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-06-05 13:45:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:55,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:55,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:55,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:55,856 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:55,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:55,856 INFO L82 PathProgramCache]: Analyzing trace with hash 117019782, now seen corresponding path program 107 times [2021-06-05 13:45:55,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:55,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179622928] [2021-06-05 13:45:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:55,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:55,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179622928] [2021-06-05 13:45:55,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179622928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:55,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622677735] [2021-06-05 13:45:55,936 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:55,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:55,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:55,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:56,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622677735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:56,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:56,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:56,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758391054] [2021-06-05 13:45:56,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:56,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:56,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:56,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:56,151 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:56,312 INFO L93 Difference]: Finished difference Result 126 states and 248 transitions. [2021-06-05 13:45:56,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:56,312 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:56,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:56,312 INFO L225 Difference]: With dead ends: 126 [2021-06-05 13:45:56,312 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 13:45:56,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 13:45:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-06-05 13:45:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 13:45:56,314 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 13:45:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:56,314 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 13:45:56,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 13:45:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:56,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:56,314 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:56,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 13:45:56,514 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:56,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2098653686, now seen corresponding path program 108 times [2021-06-05 13:45:56,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:56,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408659883] [2021-06-05 13:45:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:56,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:56,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408659883] [2021-06-05 13:45:56,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408659883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:56,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294591918] [2021-06-05 13:45:56,596 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:56,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:45:56,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:56,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:56,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294591918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:56,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:56,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:56,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632013740] [2021-06-05 13:45:56,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:56,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:56,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:56,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:56,807 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:57,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:57,049 INFO L93 Difference]: Finished difference Result 150 states and 291 transitions. [2021-06-05 13:45:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:57,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:57,050 INFO L225 Difference]: With dead ends: 150 [2021-06-05 13:45:57,050 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 13:45:57,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:57,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 13:45:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2021-06-05 13:45:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-06-05 13:45:57,051 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-06-05 13:45:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:57,051 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-06-05 13:45:57,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-06-05 13:45:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:57,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:57,051 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:57,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:57,252 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2083192890, now seen corresponding path program 109 times [2021-06-05 13:45:57,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:57,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627025529] [2021-06-05 13:45:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:57,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:57,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627025529] [2021-06-05 13:45:57,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627025529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:57,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121575096] [2021-06-05 13:45:57,338 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:57,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:57,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:57,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121575096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:57,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:57,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:57,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922437603] [2021-06-05 13:45:57,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:57,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:57,555 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:57,818 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-06-05 13:45:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:57,819 INFO L225 Difference]: With dead ends: 137 [2021-06-05 13:45:57,819 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 13:45:57,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 13:45:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2021-06-05 13:45:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-06-05 13:45:57,820 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-06-05 13:45:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:57,820 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-06-05 13:45:57,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-06-05 13:45:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:57,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:57,821 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:58,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:58,030 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:58,030 INFO L82 PathProgramCache]: Analyzing trace with hash 47517074, now seen corresponding path program 110 times [2021-06-05 13:45:58,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:58,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511328082] [2021-06-05 13:45:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:58,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:58,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511328082] [2021-06-05 13:45:58,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511328082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:58,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694611933] [2021-06-05 13:45:58,115 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:58,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:58,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:58,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:58,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:58,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694611933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:58,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:58,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:58,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354660751] [2021-06-05 13:45:58,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:58,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:58,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:58,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:58,338 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:58,538 INFO L93 Difference]: Finished difference Result 145 states and 283 transitions. [2021-06-05 13:45:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:58,538 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:58,539 INFO L225 Difference]: With dead ends: 145 [2021-06-05 13:45:58,539 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 13:45:58,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 13:45:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-06-05 13:45:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-06-05 13:45:58,540 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-06-05 13:45:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:58,540 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-06-05 13:45:58,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-06-05 13:45:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:58,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:58,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:58,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 13:45:58,749 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:58,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:58,750 INFO L82 PathProgramCache]: Analyzing trace with hash 62977870, now seen corresponding path program 111 times [2021-06-05 13:45:58,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:58,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634532963] [2021-06-05 13:45:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:58,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:58,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634532963] [2021-06-05 13:45:58,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634532963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:58,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697231209] [2021-06-05 13:45:58,835 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:58,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:58,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:58,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:58,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:59,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697231209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:59,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:59,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459851777] [2021-06-05 13:45:59,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:59,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:59,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:59,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:59,044 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:59,220 INFO L93 Difference]: Finished difference Result 151 states and 294 transitions. [2021-06-05 13:45:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:59,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:59,220 INFO L225 Difference]: With dead ends: 151 [2021-06-05 13:45:59,220 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 13:45:59,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 13:45:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-06-05 13:45:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 13:45:59,222 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 13:45:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:59,222 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 13:45:59,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 13:45:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:59,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:59,222 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:59,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:59,423 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:59,423 INFO L82 PathProgramCache]: Analyzing trace with hash 634432676, now seen corresponding path program 112 times [2021-06-05 13:45:59,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:59,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082756225] [2021-06-05 13:45:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:59,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:59,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082756225] [2021-06-05 13:45:59,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082756225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054099527] [2021-06-05 13:45:59,500 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:59,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:59,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:59,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:45:59,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:59,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054099527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:59,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:45:59,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500654355] [2021-06-05 13:45:59,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:59,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:59,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:59,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:59,718 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:59,862 INFO L93 Difference]: Finished difference Result 128 states and 253 transitions. [2021-06-05 13:45:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:59,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:45:59,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:59,863 INFO L225 Difference]: With dead ends: 128 [2021-06-05 13:45:59,863 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 13:45:59,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 13:45:59,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2021-06-05 13:45:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 13:45:59,864 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 13:45:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:59,864 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 13:45:59,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:45:59,864 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 13:45:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:45:59,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:59,864 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:00,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:00,077 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1180641562, now seen corresponding path program 113 times [2021-06-05 13:46:00,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:00,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087624858] [2021-06-05 13:46:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:00,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:00,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087624858] [2021-06-05 13:46:00,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087624858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:00,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792331795] [2021-06-05 13:46:00,168 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:00,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:46:00,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:00,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:00,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:00,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792331795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:00,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:00,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:00,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706032646] [2021-06-05 13:46:00,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:00,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:00,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:00,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:00,407 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:00,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:00,646 INFO L93 Difference]: Finished difference Result 138 states and 271 transitions. [2021-06-05 13:46:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:00,646 INFO L225 Difference]: With dead ends: 138 [2021-06-05 13:46:00,646 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 13:46:00,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 13:46:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-06-05 13:46:00,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 13:46:00,648 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 13:46:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:00,648 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 13:46:00,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 13:46:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:00,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:00,648 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:00,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:00,848 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash 797921174, now seen corresponding path program 114 times [2021-06-05 13:46:00,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:00,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025585740] [2021-06-05 13:46:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:00,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:00,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025585740] [2021-06-05 13:46:00,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025585740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:00,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023930429] [2021-06-05 13:46:00,926 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:00,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:46:00,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:00,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:00,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:01,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023930429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:01,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:01,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:01,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353619227] [2021-06-05 13:46:01,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:01,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:01,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:01,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:01,140 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:01,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:01,350 INFO L93 Difference]: Finished difference Result 142 states and 279 transitions. [2021-06-05 13:46:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:01,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:01,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:01,350 INFO L225 Difference]: With dead ends: 142 [2021-06-05 13:46:01,350 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 13:46:01,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:01,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 13:46:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-06-05 13:46:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-05 13:46:01,352 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-05 13:46:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:01,352 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-05 13:46:01,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-05 13:46:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:01,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:01,352 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:01,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:01,552 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:01,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1417752294, now seen corresponding path program 115 times [2021-06-05 13:46:01,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:01,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573182248] [2021-06-05 13:46:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:01,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:01,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573182248] [2021-06-05 13:46:01,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573182248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:01,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938596009] [2021-06-05 13:46:01,635 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:01,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:01,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:01,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938596009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:01,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:01,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:01,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291916058] [2021-06-05 13:46:01,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:01,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:01,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:01,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:01,848 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:02,078 INFO L93 Difference]: Finished difference Result 164 states and 319 transitions. [2021-06-05 13:46:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:02,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:02,079 INFO L225 Difference]: With dead ends: 164 [2021-06-05 13:46:02,079 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 13:46:02,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 13:46:02,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-06-05 13:46:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 13:46:02,080 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 13:46:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:02,081 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 13:46:02,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 13:46:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:02,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:02,081 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:02,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 13:46:02,281 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1402291498, now seen corresponding path program 116 times [2021-06-05 13:46:02,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:02,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510765887] [2021-06-05 13:46:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:02,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:02,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510765887] [2021-06-05 13:46:02,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510765887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:02,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892080136] [2021-06-05 13:46:02,365 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:02,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:02,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:02,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:02,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:02,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892080136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:02,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:02,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:02,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776305420] [2021-06-05 13:46:02,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:02,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:02,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:02,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:02,578 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:02,856 INFO L93 Difference]: Finished difference Result 151 states and 301 transitions. [2021-06-05 13:46:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:02,857 INFO L225 Difference]: With dead ends: 151 [2021-06-05 13:46:02,857 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 13:46:02,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 13:46:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2021-06-05 13:46:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-06-05 13:46:02,858 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-06-05 13:46:02,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:02,858 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-06-05 13:46:02,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:02,858 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-06-05 13:46:02,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:02,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:02,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:03,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 13:46:03,069 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:03,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1810613706, now seen corresponding path program 117 times [2021-06-05 13:46:03,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:03,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354002281] [2021-06-05 13:46:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:03,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:03,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354002281] [2021-06-05 13:46:03,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354002281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:03,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300093822] [2021-06-05 13:46:03,146 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:03,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:46:03,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:03,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:03,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:03,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300093822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:03,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:03,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:03,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383657429] [2021-06-05 13:46:03,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:03,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:03,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:03,363 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:03,541 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-06-05 13:46:03,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:03,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:03,541 INFO L225 Difference]: With dead ends: 130 [2021-06-05 13:46:03,541 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 13:46:03,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:03,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 13:46:03,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2021-06-05 13:46:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-06-05 13:46:03,543 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-06-05 13:46:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:03,543 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-06-05 13:46:03,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-06-05 13:46:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:03,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:03,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:03,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 13:46:03,743 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:03,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:03,743 INFO L82 PathProgramCache]: Analyzing trace with hash -405059762, now seen corresponding path program 118 times [2021-06-05 13:46:03,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:03,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44039166] [2021-06-05 13:46:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:03,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:03,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44039166] [2021-06-05 13:46:03,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44039166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:03,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755536013] [2021-06-05 13:46:03,824 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:03,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:03,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:03,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:04,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755536013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:04,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:04,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:04,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32528342] [2021-06-05 13:46:04,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:04,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:04,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:04,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:04,039 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:04,263 INFO L93 Difference]: Finished difference Result 153 states and 297 transitions. [2021-06-05 13:46:04,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:04,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:04,264 INFO L225 Difference]: With dead ends: 153 [2021-06-05 13:46:04,264 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 13:46:04,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 13:46:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-06-05 13:46:04,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-06-05 13:46:04,265 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-06-05 13:46:04,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:04,265 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-06-05 13:46:04,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-06-05 13:46:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:04,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:04,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:04,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:04,468 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:04,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:04,469 INFO L82 PathProgramCache]: Analyzing trace with hash -389598966, now seen corresponding path program 119 times [2021-06-05 13:46:04,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:04,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486227004] [2021-06-05 13:46:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:04,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:04,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486227004] [2021-06-05 13:46:04,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486227004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:04,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44215758] [2021-06-05 13:46:04,551 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:04,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:04,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:04,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:04,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:04,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44215758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:04,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:04,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:04,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541846038] [2021-06-05 13:46:04,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:04,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:04,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:04,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:04,770 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:05,019 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-06-05 13:46:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:05,019 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:05,020 INFO L225 Difference]: With dead ends: 140 [2021-06-05 13:46:05,020 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 13:46:05,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 13:46:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-05 13:46:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.036363636363636) internal successors, (224), 110 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 224 transitions. [2021-06-05 13:46:05,021 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 224 transitions. Word has length 19 [2021-06-05 13:46:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:05,021 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 224 transitions. [2021-06-05 13:46:05,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 224 transitions. [2021-06-05 13:46:05,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:05,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:05,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:05,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 13:46:05,237 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:05,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1741110998, now seen corresponding path program 120 times [2021-06-05 13:46:05,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:05,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212397936] [2021-06-05 13:46:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:05,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:05,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212397936] [2021-06-05 13:46:05,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212397936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:05,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843395844] [2021-06-05 13:46:05,319 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:05,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:05,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:05,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:05,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:05,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843395844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:05,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:05,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:05,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101949967] [2021-06-05 13:46:05,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:05,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:05,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:05,536 INFO L87 Difference]: Start difference. First operand 111 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:05,760 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-06-05 13:46:05,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:05,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:05,761 INFO L225 Difference]: With dead ends: 150 [2021-06-05 13:46:05,761 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 13:46:05,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:05,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 13:46:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-06-05 13:46:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-06-05 13:46:05,762 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-06-05 13:46:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:05,762 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-06-05 13:46:05,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-06-05 13:46:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:05,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:05,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:05,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 13:46:05,965 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1756571794, now seen corresponding path program 121 times [2021-06-05 13:46:05,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:05,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158086021] [2021-06-05 13:46:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:06,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:06,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158086021] [2021-06-05 13:46:06,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158086021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:06,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645571265] [2021-06-05 13:46:06,046 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:06,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:06,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:06,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645571265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:06,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:06,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:06,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003039861] [2021-06-05 13:46:06,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:06,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:06,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:06,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:06,252 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:06,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:06,487 INFO L93 Difference]: Finished difference Result 156 states and 304 transitions. [2021-06-05 13:46:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:06,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:06,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:06,487 INFO L225 Difference]: With dead ends: 156 [2021-06-05 13:46:06,487 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 13:46:06,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:06,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 13:46:06,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 112. [2021-06-05 13:46:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:06,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-06-05 13:46:06,489 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-06-05 13:46:06,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:06,489 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-06-05 13:46:06,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:06,489 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-06-05 13:46:06,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:06,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:06,489 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:06,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 13:46:06,697 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:06,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1966940696, now seen corresponding path program 122 times [2021-06-05 13:46:06,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:06,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517065105] [2021-06-05 13:46:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:06,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:06,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517065105] [2021-06-05 13:46:06,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517065105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:06,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737402876] [2021-06-05 13:46:06,775 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:06,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:06,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:06,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:06,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:06,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737402876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:06,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:06,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:06,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243659393] [2021-06-05 13:46:06,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:06,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:06,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:06,986 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:07,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:07,201 INFO L93 Difference]: Finished difference Result 133 states and 263 transitions. [2021-06-05 13:46:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:07,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:07,201 INFO L225 Difference]: With dead ends: 133 [2021-06-05 13:46:07,201 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 13:46:07,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 13:46:07,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2021-06-05 13:46:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-06-05 13:46:07,202 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-06-05 13:46:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:07,203 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-06-05 13:46:07,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-06-05 13:46:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:07,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:07,203 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:07,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:07,418 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:07,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1598555310, now seen corresponding path program 123 times [2021-06-05 13:46:07,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:07,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714379160] [2021-06-05 13:46:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:07,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:07,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714379160] [2021-06-05 13:46:07,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714379160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:07,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441635384] [2021-06-05 13:46:07,495 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:07,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:46:07,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:07,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:07,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:07,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441635384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:07,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:07,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:07,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982348335] [2021-06-05 13:46:07,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:07,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:07,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:07,711 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:07,865 INFO L93 Difference]: Finished difference Result 128 states and 252 transitions. [2021-06-05 13:46:07,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:07,865 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:07,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:07,865 INFO L225 Difference]: With dead ends: 128 [2021-06-05 13:46:07,865 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 13:46:07,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:07,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 13:46:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-06-05 13:46:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-05 13:46:07,867 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-05 13:46:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:07,867 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-05 13:46:07,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-05 13:46:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:07,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:07,867 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:08,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:08,067 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:08,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:08,068 INFO L82 PathProgramCache]: Analyzing trace with hash 480738518, now seen corresponding path program 124 times [2021-06-05 13:46:08,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:08,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612811473] [2021-06-05 13:46:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:08,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:08,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612811473] [2021-06-05 13:46:08,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612811473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:08,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846098227] [2021-06-05 13:46:08,150 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:08,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:08,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:08,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:08,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846098227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:08,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:08,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:08,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137992853] [2021-06-05 13:46:08,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:08,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:08,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:08,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:08,365 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:08,607 INFO L93 Difference]: Finished difference Result 151 states and 293 transitions. [2021-06-05 13:46:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:08,608 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:08,608 INFO L225 Difference]: With dead ends: 151 [2021-06-05 13:46:08,608 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 13:46:08,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 13:46:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-06-05 13:46:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 13:46:08,609 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 13:46:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:08,609 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 13:46:08,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 13:46:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:08,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:08,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:08,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 13:46:08,825 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:08,825 INFO L82 PathProgramCache]: Analyzing trace with hash 496199314, now seen corresponding path program 125 times [2021-06-05 13:46:08,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:08,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159678735] [2021-06-05 13:46:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:08,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:08,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159678735] [2021-06-05 13:46:08,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159678735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:08,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056872356] [2021-06-05 13:46:08,917 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:08,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:08,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:08,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:08,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:09,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056872356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:09,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:09,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:09,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309265976] [2021-06-05 13:46:09,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:09,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:09,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:09,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:09,148 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:09,417 INFO L93 Difference]: Finished difference Result 138 states and 275 transitions. [2021-06-05 13:46:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:09,418 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:09,418 INFO L225 Difference]: With dead ends: 138 [2021-06-05 13:46:09,418 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 13:46:09,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 13:46:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-06-05 13:46:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 13:46:09,420 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 13:46:09,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:09,420 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 13:46:09,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:09,420 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 13:46:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:09,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:09,420 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:09,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 13:46:09,620 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1668058018, now seen corresponding path program 126 times [2021-06-05 13:46:09,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:09,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165707286] [2021-06-05 13:46:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:09,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:09,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165707286] [2021-06-05 13:46:09,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165707286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:09,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415503836] [2021-06-05 13:46:09,701 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:09,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:09,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:09,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:09,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:09,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415503836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:09,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:09,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:09,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450447901] [2021-06-05 13:46:09,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:09,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:09,914 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:10,144 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-06-05 13:46:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:10,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:10,145 INFO L225 Difference]: With dead ends: 148 [2021-06-05 13:46:10,145 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 13:46:10,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:10,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 13:46:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-06-05 13:46:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 13:46:10,147 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 13:46:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:10,147 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 13:46:10,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 13:46:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:10,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:10,147 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:10,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 13:46:10,347 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:10,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:10,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1652597222, now seen corresponding path program 127 times [2021-06-05 13:46:10,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:10,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143217665] [2021-06-05 13:46:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:10,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:10,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143217665] [2021-06-05 13:46:10,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143217665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:10,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787115909] [2021-06-05 13:46:10,433 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:10,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:10,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787115909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:10,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:10,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:10,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615983972] [2021-06-05 13:46:10,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:10,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:10,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:10,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:10,640 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:10,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:10,871 INFO L93 Difference]: Finished difference Result 154 states and 300 transitions. [2021-06-05 13:46:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:10,871 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:10,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:10,872 INFO L225 Difference]: With dead ends: 154 [2021-06-05 13:46:10,872 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 13:46:10,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 13:46:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2021-06-05 13:46:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-05 13:46:10,873 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-05 13:46:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:10,873 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-05 13:46:10,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-05 13:46:10,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:10,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:10,874 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:11,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 13:46:11,077 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:11,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:11,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1081142416, now seen corresponding path program 128 times [2021-06-05 13:46:11,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:11,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206410771] [2021-06-05 13:46:11,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:11,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:11,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206410771] [2021-06-05 13:46:11,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206410771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:11,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382671116] [2021-06-05 13:46:11,159 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:11,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:11,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:11,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:11,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:11,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382671116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:11,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:11,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:11,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85365947] [2021-06-05 13:46:11,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:11,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:11,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:11,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:11,374 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:11,576 INFO L93 Difference]: Finished difference Result 131 states and 259 transitions. [2021-06-05 13:46:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:11,576 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:11,576 INFO L225 Difference]: With dead ends: 131 [2021-06-05 13:46:11,576 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 13:46:11,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 13:46:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-06-05 13:46:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-06-05 13:46:11,578 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 19 [2021-06-05 13:46:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:11,578 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-06-05 13:46:11,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-06-05 13:46:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:11,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:11,578 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:11,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 13:46:11,779 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:11,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:11,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1532817690, now seen corresponding path program 129 times [2021-06-05 13:46:11,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:11,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489400210] [2021-06-05 13:46:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:11,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:11,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489400210] [2021-06-05 13:46:11,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489400210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:11,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607284739] [2021-06-05 13:46:11,862 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:11,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:46:11,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:11,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:11,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:12,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607284739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:12,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:12,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:12,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368681063] [2021-06-05 13:46:12,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:12,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:12,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:12,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:12,093 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:12,320 INFO L93 Difference]: Finished difference Result 165 states and 320 transitions. [2021-06-05 13:46:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:12,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:12,321 INFO L225 Difference]: With dead ends: 165 [2021-06-05 13:46:12,321 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 13:46:12,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:12,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 13:46:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2021-06-05 13:46:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 13:46:12,323 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-06-05 13:46:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:12,323 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 13:46:12,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 13:46:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:12,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:12,323 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:12,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 13:46:12,523 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1548278486, now seen corresponding path program 130 times [2021-06-05 13:46:12,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:12,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118731646] [2021-06-05 13:46:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:12,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:12,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118731646] [2021-06-05 13:46:12,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118731646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:12,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779174627] [2021-06-05 13:46:12,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:12,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:12,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:12,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779174627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:12,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:12,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:12,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755138458] [2021-06-05 13:46:12,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:12,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:12,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:12,826 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:13,135 INFO L93 Difference]: Finished difference Result 171 states and 331 transitions. [2021-06-05 13:46:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:13,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:13,135 INFO L225 Difference]: With dead ends: 171 [2021-06-05 13:46:13,135 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 13:46:13,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:13,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 13:46:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2021-06-05 13:46:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 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) [2021-06-05 13:46:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-06-05 13:46:13,137 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-06-05 13:46:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:13,137 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-06-05 13:46:13,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-06-05 13:46:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:13,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:13,137 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:13,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 13:46:13,338 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2119733292, now seen corresponding path program 131 times [2021-06-05 13:46:13,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:13,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741645244] [2021-06-05 13:46:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:13,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:13,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741645244] [2021-06-05 13:46:13,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741645244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:13,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59307298] [2021-06-05 13:46:13,416 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:13,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:46:13,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:13,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:13,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59307298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:13,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:13,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:13,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897178264] [2021-06-05 13:46:13,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:13,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:13,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:13,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:13,623 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:13,831 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-06-05 13:46:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:13,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:13,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:13,831 INFO L225 Difference]: With dead ends: 150 [2021-06-05 13:46:13,831 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 13:46:13,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 13:46:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-06-05 13:46:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-06-05 13:46:13,833 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-06-05 13:46:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:13,833 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-06-05 13:46:13,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-06-05 13:46:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:13,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:13,833 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:14,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 13:46:14,034 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:14,034 INFO L82 PathProgramCache]: Analyzing trace with hash -737818470, now seen corresponding path program 132 times [2021-06-05 13:46:14,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:14,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753998021] [2021-06-05 13:46:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:14,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:14,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753998021] [2021-06-05 13:46:14,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753998021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:14,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5501306] [2021-06-05 13:46:14,110 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:14,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:46:14,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:14,130 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:14,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5501306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:14,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:14,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:46:14,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461948553] [2021-06-05 13:46:14,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:14,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:14,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:14,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:14,318 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 13:46:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:14,898 INFO L93 Difference]: Finished difference Result 197 states and 356 transitions. [2021-06-05 13:46:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:46:14,898 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-05 13:46:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:14,898 INFO L225 Difference]: With dead ends: 197 [2021-06-05 13:46:14,898 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 13:46:14,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 609.7ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:46:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 13:46:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2021-06-05 13:46:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 115 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) [2021-06-05 13:46:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 236 transitions. [2021-06-05 13:46:14,900 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 236 transitions. Word has length 19 [2021-06-05 13:46:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:14,900 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 236 transitions. [2021-06-05 13:46:14,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 13:46:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 236 transitions. [2021-06-05 13:46:14,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:14,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:14,900 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:15,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:15,101 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:15,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1120538858, now seen corresponding path program 133 times [2021-06-05 13:46:15,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:15,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18741827] [2021-06-05 13:46:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:15,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:15,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18741827] [2021-06-05 13:46:15,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18741827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:15,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902065695] [2021-06-05 13:46:15,178 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:15,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:15,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:15,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902065695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:15,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:15,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:46:15,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915615060] [2021-06-05 13:46:15,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:15,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:15,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:15,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:15,388 INFO L87 Difference]: Start difference. First operand 116 states and 236 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 13:46:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:15,771 INFO L93 Difference]: Finished difference Result 160 states and 304 transitions. [2021-06-05 13:46:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:46:15,771 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-05 13:46:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:15,771 INFO L225 Difference]: With dead ends: 160 [2021-06-05 13:46:15,771 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 13:46:15,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:46:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 13:46:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2021-06-05 13:46:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-05 13:46:15,773 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-05 13:46:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:15,773 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-05 13:46:15,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 13:46:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-05 13:46:15,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:15,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:15,773 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:15,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:15,973 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:15,974 INFO L82 PathProgramCache]: Analyzing trace with hash 958754970, now seen corresponding path program 134 times [2021-06-05 13:46:15,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:15,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163977256] [2021-06-05 13:46:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:16,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:16,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163977256] [2021-06-05 13:46:16,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163977256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:16,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355795344] [2021-06-05 13:46:16,053 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:16,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:16,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:16,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:16,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355795344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:16,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:16,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:46:16,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999766337] [2021-06-05 13:46:16,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:16,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:16,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:16,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:16,285 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 13:46:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:16,989 INFO L93 Difference]: Finished difference Result 223 states and 409 transitions. [2021-06-05 13:46:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:46:16,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-05 13:46:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:16,990 INFO L225 Difference]: With dead ends: 223 [2021-06-05 13:46:16,990 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 13:46:16,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 750.8ms TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:46:16,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 13:46:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 113. [2021-06-05 13:46:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 13:46:16,991 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 13:46:16,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:16,991 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 13:46:16,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 13:46:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 13:46:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:16,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:16,992 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:17,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:17,193 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:17,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:17,193 INFO L82 PathProgramCache]: Analyzing trace with hash 974215766, now seen corresponding path program 135 times [2021-06-05 13:46:17,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:17,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085966404] [2021-06-05 13:46:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:17,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:17,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085966404] [2021-06-05 13:46:17,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085966404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:17,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262176727] [2021-06-05 13:46:17,276 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:46:17,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:46:17,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:17,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:17,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:17,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262176727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:17,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:17,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:46:17,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410375613] [2021-06-05 13:46:17,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:17,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:17,526 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 13:46:18,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:18,344 INFO L93 Difference]: Finished difference Result 214 states and 397 transitions. [2021-06-05 13:46:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:46:18,344 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-05 13:46:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:18,345 INFO L225 Difference]: With dead ends: 214 [2021-06-05 13:46:18,345 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 13:46:18,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 771.8ms TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:46:18,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 13:46:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 111. [2021-06-05 13:46:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 13:46:18,346 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 13:46:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:18,346 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 13:46:18,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 13:46:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 13:46:18,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:18,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:18,347 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:18,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:18,552 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1581877714, now seen corresponding path program 136 times [2021-06-05 13:46:18,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:18,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137643094] [2021-06-05 13:46:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:18,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:18,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137643094] [2021-06-05 13:46:18,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137643094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:18,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677064740] [2021-06-05 13:46:18,629 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:18,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:18,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:18,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:18,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:18,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677064740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:18,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:18,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:18,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150426606] [2021-06-05 13:46:18,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:18,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:18,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:18,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:18,847 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:19,016 INFO L93 Difference]: Finished difference Result 137 states and 269 transitions. [2021-06-05 13:46:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:46:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:19,017 INFO L225 Difference]: With dead ends: 137 [2021-06-05 13:46:19,017 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 13:46:19,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 13:46:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2021-06-05 13:46:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 13:46:19,018 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 13:46:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:19,018 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 13:46:19,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:46:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 13:46:19,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:19,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:19,019 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:19,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 13:46:19,219 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:19,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:19,219 INFO L82 PathProgramCache]: Analyzing trace with hash 811172182, now seen corresponding path program 137 times [2021-06-05 13:46:19,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:19,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347854786] [2021-06-05 13:46:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:19,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:19,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347854786] [2021-06-05 13:46:19,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347854786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:19,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590193025] [2021-06-05 13:46:19,300 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:19,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:19,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:19,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:19,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:19,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590193025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:19,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:19,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:19,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616598090] [2021-06-05 13:46:19,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:19,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:19,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:19,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:19,475 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:20,168 INFO L93 Difference]: Finished difference Result 235 states and 445 transitions. [2021-06-05 13:46:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:46:20,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:20,169 INFO L225 Difference]: With dead ends: 235 [2021-06-05 13:46:20,169 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 13:46:20,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 559.3ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:46:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 13:46:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 115. [2021-06-05 13:46:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-05 13:46:20,171 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-05 13:46:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:20,171 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-05 13:46:20,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-05 13:46:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:20,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:20,171 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:20,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 13:46:20,371 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:20,372 INFO L82 PathProgramCache]: Analyzing trace with hash 826632978, now seen corresponding path program 138 times [2021-06-05 13:46:20,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:20,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978365469] [2021-06-05 13:46:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:20,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:20,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978365469] [2021-06-05 13:46:20,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978365469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:20,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013408115] [2021-06-05 13:46:20,452 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:20,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:46:20,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:20,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:20,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:20,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013408115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:20,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:20,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:20,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436111838] [2021-06-05 13:46:20,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:20,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:20,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:20,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:20,626 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:21,276 INFO L93 Difference]: Finished difference Result 235 states and 448 transitions. [2021-06-05 13:46:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:46:21,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:21,276 INFO L225 Difference]: With dead ends: 235 [2021-06-05 13:46:21,276 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 13:46:21,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:46:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 13:46:21,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 114. [2021-06-05 13:46:21,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-05 13:46:21,278 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-05 13:46:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:21,278 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-05 13:46:21,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-05 13:46:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:21,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:21,278 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:21,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 13:46:21,479 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:21,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:21,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1398087784, now seen corresponding path program 139 times [2021-06-05 13:46:21,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:21,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888327106] [2021-06-05 13:46:21,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:21,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:21,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888327106] [2021-06-05 13:46:21,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888327106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:21,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274543210] [2021-06-05 13:46:21,553 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:21,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:21,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:21,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274543210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:21,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:21,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:21,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950897936] [2021-06-05 13:46:21,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:21,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:21,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:21,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:21,724 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:22,320 INFO L93 Difference]: Finished difference Result 201 states and 382 transitions. [2021-06-05 13:46:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:46:22,320 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:22,321 INFO L225 Difference]: With dead ends: 201 [2021-06-05 13:46:22,321 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 13:46:22,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:46:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 13:46:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 113. [2021-06-05 13:46:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 13:46:22,322 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 13:46:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:22,322 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 13:46:22,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 13:46:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:22,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:22,323 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:22,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 13:46:22,523 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:22,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1459463978, now seen corresponding path program 140 times [2021-06-05 13:46:22,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:22,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140013263] [2021-06-05 13:46:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:22,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:22,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140013263] [2021-06-05 13:46:22,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140013263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:22,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747670371] [2021-06-05 13:46:22,600 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:22,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:22,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:22,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:22,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:22,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747670371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:22,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:22,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:22,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032246909] [2021-06-05 13:46:22,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:22,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:22,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:22,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:22,810 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:23,040 INFO L93 Difference]: Finished difference Result 157 states and 306 transitions. [2021-06-05 13:46:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:23,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:23,040 INFO L225 Difference]: With dead ends: 157 [2021-06-05 13:46:23,041 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 13:46:23,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 13:46:23,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 113. [2021-06-05 13:46:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 13:46:23,042 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 13:46:23,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:23,042 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 13:46:23,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 13:46:23,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:23,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:23,042 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:23,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 13:46:23,243 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1842184366, now seen corresponding path program 141 times [2021-06-05 13:46:23,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:23,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931337162] [2021-06-05 13:46:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:23,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:23,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931337162] [2021-06-05 13:46:23,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931337162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:23,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373692291] [2021-06-05 13:46:23,319 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:23,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:46:23,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:23,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:23,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:23,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373692291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:23,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:23,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:23,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540007465] [2021-06-05 13:46:23,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:23,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:23,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:23,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:23,532 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:23,702 INFO L93 Difference]: Finished difference Result 161 states and 314 transitions. [2021-06-05 13:46:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:23,702 INFO L225 Difference]: With dead ends: 161 [2021-06-05 13:46:23,703 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 13:46:23,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 248.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 13:46:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2021-06-05 13:46:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-05 13:46:23,704 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-05 13:46:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:23,704 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-05 13:46:23,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-05 13:46:23,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:23,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:23,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:23,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 13:46:23,909 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:23,909 INFO L82 PathProgramCache]: Analyzing trace with hash 237109462, now seen corresponding path program 142 times [2021-06-05 13:46:23,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:23,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957301817] [2021-06-05 13:46:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:23,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:23,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957301817] [2021-06-05 13:46:23,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957301817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:23,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197623955] [2021-06-05 13:46:23,988 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:24,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:24,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:24,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:24,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:24,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197623955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:24,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:24,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:24,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187688523] [2021-06-05 13:46:24,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:24,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:24,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:24,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:24,193 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:24,506 INFO L93 Difference]: Finished difference Result 183 states and 354 transitions. [2021-06-05 13:46:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:24,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:24,507 INFO L225 Difference]: With dead ends: 183 [2021-06-05 13:46:24,507 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 13:46:24,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 13:46:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 115. [2021-06-05 13:46:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-05 13:46:24,508 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-05 13:46:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:24,508 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-05 13:46:24,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-05 13:46:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:24,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:24,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:24,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:24,725 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash 252570258, now seen corresponding path program 143 times [2021-06-05 13:46:24,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:24,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357735337] [2021-06-05 13:46:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:24,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:24,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357735337] [2021-06-05 13:46:24,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357735337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:24,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781458832] [2021-06-05 13:46:24,806 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:24,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:46:24,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:24,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:24,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:25,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781458832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:25,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:25,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:25,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298251410] [2021-06-05 13:46:25,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:25,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:25,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:25,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:25,011 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:25,236 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-06-05 13:46:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:25,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:25,237 INFO L225 Difference]: With dead ends: 170 [2021-06-05 13:46:25,237 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 13:46:25,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 13:46:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-06-05 13:46:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 13:46:25,238 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 13:46:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:25,238 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 13:46:25,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 13:46:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:25,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:25,239 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:25,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:25,439 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:25,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:25,439 INFO L82 PathProgramCache]: Analyzing trace with hash 860232206, now seen corresponding path program 144 times [2021-06-05 13:46:25,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:25,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210300735] [2021-06-05 13:46:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:25,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:25,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210300735] [2021-06-05 13:46:25,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210300735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:25,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188331065] [2021-06-05 13:46:25,515 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:25,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:25,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:25,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:25,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:25,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188331065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:25,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:25,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:25,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22301220] [2021-06-05 13:46:25,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:25,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:25,699 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:26,362 INFO L93 Difference]: Finished difference Result 215 states and 406 transitions. [2021-06-05 13:46:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:46:26,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:26,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:26,362 INFO L225 Difference]: With dead ends: 215 [2021-06-05 13:46:26,362 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 13:46:26,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 688.7ms TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:46:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 13:46:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 104. [2021-06-05 13:46:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-06-05 13:46:26,364 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 19 [2021-06-05 13:46:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:26,364 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-06-05 13:46:26,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-06-05 13:46:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:26,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:26,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:26,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:26,564 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash -829491834, now seen corresponding path program 145 times [2021-06-05 13:46:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:26,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986867354] [2021-06-05 13:46:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:26,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:26,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986867354] [2021-06-05 13:46:26,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986867354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:26,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300512191] [2021-06-05 13:46:26,640 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:26,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:26,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:26,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300512191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:26,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:26,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:26,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008969487] [2021-06-05 13:46:26,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:26,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:26,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:26,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:26,864 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:27,066 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2021-06-05 13:46:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:27,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:27,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:27,066 INFO L225 Difference]: With dead ends: 126 [2021-06-05 13:46:27,066 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 13:46:27,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 13:46:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2021-06-05 13:46:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 13:46:27,068 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-05 13:46:27,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:27,068 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 13:46:27,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 13:46:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:27,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:27,068 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:27,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:27,269 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:27,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:27,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1249801994, now seen corresponding path program 146 times [2021-06-05 13:46:27,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:27,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133349454] [2021-06-05 13:46:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:27,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:27,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133349454] [2021-06-05 13:46:27,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133349454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:27,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234191379] [2021-06-05 13:46:27,353 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:27,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:27,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:27,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:27,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:27,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234191379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:27,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:27,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:27,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623867504] [2021-06-05 13:46:27,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:27,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:27,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:27,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:27,584 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:27,823 INFO L93 Difference]: Finished difference Result 149 states and 288 transitions. [2021-06-05 13:46:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:27,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:27,824 INFO L225 Difference]: With dead ends: 149 [2021-06-05 13:46:27,824 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 13:46:27,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 13:46:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 107. [2021-06-05 13:46:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 13:46:27,825 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-05 13:46:27,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:27,825 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 13:46:27,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 13:46:27,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:27,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:27,826 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:28,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:28,026 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:28,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:28,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1265262790, now seen corresponding path program 147 times [2021-06-05 13:46:28,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:28,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754254466] [2021-06-05 13:46:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:28,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:28,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754254466] [2021-06-05 13:46:28,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754254466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:28,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170306508] [2021-06-05 13:46:28,106 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:28,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:46:28,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:28,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:28,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:28,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170306508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:28,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:28,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:28,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466811655] [2021-06-05 13:46:28,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:28,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:28,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:28,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:28,319 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:28,539 INFO L93 Difference]: Finished difference Result 136 states and 270 transitions. [2021-06-05 13:46:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:28,540 INFO L225 Difference]: With dead ends: 136 [2021-06-05 13:46:28,540 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 13:46:28,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 13:46:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2021-06-05 13:46:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-06-05 13:46:28,541 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 19 [2021-06-05 13:46:28,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:28,541 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-06-05 13:46:28,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-06-05 13:46:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:28,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:28,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:28,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:28,742 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:28,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:28,742 INFO L82 PathProgramCache]: Analyzing trace with hash -898994542, now seen corresponding path program 148 times [2021-06-05 13:46:28,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:28,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036003669] [2021-06-05 13:46:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:28,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:28,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036003669] [2021-06-05 13:46:28,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036003669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:28,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957728436] [2021-06-05 13:46:28,822 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:28,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:28,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:28,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:28,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:29,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957728436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:29,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:29,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:29,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101430173] [2021-06-05 13:46:29,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:29,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:29,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:29,035 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:29,282 INFO L93 Difference]: Finished difference Result 146 states and 284 transitions. [2021-06-05 13:46:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:29,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:29,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:29,283 INFO L225 Difference]: With dead ends: 146 [2021-06-05 13:46:29,283 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 13:46:29,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:29,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 13:46:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 107. [2021-06-05 13:46:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 13:46:29,284 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-05 13:46:29,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:29,285 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 13:46:29,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 13:46:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:29,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:29,285 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:29,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 13:46:29,489 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:29,489 INFO L82 PathProgramCache]: Analyzing trace with hash -883533746, now seen corresponding path program 149 times [2021-06-05 13:46:29,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:29,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033870747] [2021-06-05 13:46:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:29,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:29,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033870747] [2021-06-05 13:46:29,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033870747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:29,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105823282] [2021-06-05 13:46:29,578 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:29,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:29,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:29,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:29,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:29,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105823282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:29,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:29,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:29,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464072616] [2021-06-05 13:46:29,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:29,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:29,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:29,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:29,785 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:29,981 INFO L93 Difference]: Finished difference Result 152 states and 295 transitions. [2021-06-05 13:46:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:29,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:29,982 INFO L225 Difference]: With dead ends: 152 [2021-06-05 13:46:29,982 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 13:46:29,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 13:46:29,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-06-05 13:46:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 13:46:29,983 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-05 13:46:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:29,983 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 13:46:29,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 13:46:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:29,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:29,984 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:30,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 13:46:30,184 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:30,184 INFO L82 PathProgramCache]: Analyzing trace with hash -312078940, now seen corresponding path program 150 times [2021-06-05 13:46:30,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:30,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556778953] [2021-06-05 13:46:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:30,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:30,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556778953] [2021-06-05 13:46:30,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556778953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:30,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530010800] [2021-06-05 13:46:30,262 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:30,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:30,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:30,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530010800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:30,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:30,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:30,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160252615] [2021-06-05 13:46:30,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:30,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:30,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:30,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:30,475 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:30,619 INFO L93 Difference]: Finished difference Result 129 states and 254 transitions. [2021-06-05 13:46:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:30,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:30,620 INFO L225 Difference]: With dead ends: 129 [2021-06-05 13:46:30,620 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 13:46:30,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 13:46:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2021-06-05 13:46:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:30,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 208 transitions. [2021-06-05 13:46:30,621 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 208 transitions. Word has length 19 [2021-06-05 13:46:30,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:30,621 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 208 transitions. [2021-06-05 13:46:30,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:30,621 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 208 transitions. [2021-06-05 13:46:30,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:30,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:30,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:30,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 13:46:30,822 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash 56306446, now seen corresponding path program 151 times [2021-06-05 13:46:30,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:30,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345067251] [2021-06-05 13:46:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:30,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:30,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345067251] [2021-06-05 13:46:30,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345067251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:30,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448611500] [2021-06-05 13:46:30,897 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:30,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:30,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:31,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448611500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:31,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:31,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:31,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675359232] [2021-06-05 13:46:31,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:31,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:31,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:31,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:31,107 INFO L87 Difference]: Start difference. First operand 103 states and 208 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:31,261 INFO L93 Difference]: Finished difference Result 130 states and 255 transitions. [2021-06-05 13:46:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:31,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:31,262 INFO L225 Difference]: With dead ends: 130 [2021-06-05 13:46:31,262 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 13:46:31,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:31,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 13:46:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2021-06-05 13:46:31,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 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) [2021-06-05 13:46:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-06-05 13:46:31,263 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-06-05 13:46:31,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:31,263 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-06-05 13:46:31,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-06-05 13:46:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:31,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:31,264 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:31,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:31,464 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:31,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2135600274, now seen corresponding path program 152 times [2021-06-05 13:46:31,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:31,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744794745] [2021-06-05 13:46:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:31,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:31,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744794745] [2021-06-05 13:46:31,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744794745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:31,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351274031] [2021-06-05 13:46:31,545 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:31,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:31,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:31,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:31,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:31,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351274031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:31,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:31,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:31,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844678786] [2021-06-05 13:46:31,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:31,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:31,757 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:31,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:31,929 INFO L93 Difference]: Finished difference Result 153 states and 296 transitions. [2021-06-05 13:46:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:31,930 INFO L225 Difference]: With dead ends: 153 [2021-06-05 13:46:31,930 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 13:46:31,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 13:46:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 107. [2021-06-05 13:46:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-06-05 13:46:31,931 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-06-05 13:46:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:31,931 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-06-05 13:46:31,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-06-05 13:46:31,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:31,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:31,931 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:32,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 13:46:32,132 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:32,132 INFO L82 PathProgramCache]: Analyzing trace with hash -2143906226, now seen corresponding path program 153 times [2021-06-05 13:46:32,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:32,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142049341] [2021-06-05 13:46:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:32,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:32,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142049341] [2021-06-05 13:46:32,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142049341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:32,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108564451] [2021-06-05 13:46:32,212 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:32,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:46:32,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:32,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108564451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:32,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:32,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:32,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094600488] [2021-06-05 13:46:32,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:32,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:32,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:32,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:32,431 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:32,637 INFO L93 Difference]: Finished difference Result 140 states and 278 transitions. [2021-06-05 13:46:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:32,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:32,638 INFO L225 Difference]: With dead ends: 140 [2021-06-05 13:46:32,638 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 13:46:32,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 281.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 13:46:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 105. [2021-06-05 13:46:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-06-05 13:46:32,639 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 19 [2021-06-05 13:46:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:32,640 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-06-05 13:46:32,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-06-05 13:46:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:32,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:32,640 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:32,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:32,855 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:32,855 INFO L82 PathProgramCache]: Analyzing trace with hash -13196262, now seen corresponding path program 154 times [2021-06-05 13:46:32,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:32,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055378238] [2021-06-05 13:46:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:32,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:32,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055378238] [2021-06-05 13:46:32,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055378238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:32,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522814120] [2021-06-05 13:46:32,935 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:32,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:32,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:32,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:32,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:33,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522814120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:33,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:33,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:33,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036515386] [2021-06-05 13:46:33,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:33,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:33,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:33,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:33,149 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:33,397 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-06-05 13:46:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:33,397 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:33,397 INFO L225 Difference]: With dead ends: 150 [2021-06-05 13:46:33,397 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 13:46:33,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:33,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 13:46:33,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-06-05 13:46:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-06-05 13:46:33,399 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-06-05 13:46:33,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:33,399 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-06-05 13:46:33,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:33,399 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-06-05 13:46:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:33,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:33,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:33,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:33,600 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2264534, now seen corresponding path program 155 times [2021-06-05 13:46:33,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:33,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334728567] [2021-06-05 13:46:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:33,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:33,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334728567] [2021-06-05 13:46:33,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334728567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:33,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668263900] [2021-06-05 13:46:33,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:33,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:33,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:33,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:33,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:33,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668263900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:33,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:33,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:33,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844725868] [2021-06-05 13:46:33,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:33,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:33,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:33,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:33,892 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:34,072 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-06-05 13:46:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:34,073 INFO L225 Difference]: With dead ends: 156 [2021-06-05 13:46:34,073 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 13:46:34,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 13:46:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 106. [2021-06-05 13:46:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 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) [2021-06-05 13:46:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-06-05 13:46:34,074 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-06-05 13:46:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:34,074 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-06-05 13:46:34,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-06-05 13:46:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:34,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:34,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:34,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable163 [2021-06-05 13:46:34,275 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash 573719340, now seen corresponding path program 156 times [2021-06-05 13:46:34,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:34,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544216562] [2021-06-05 13:46:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:34,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:34,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544216562] [2021-06-05 13:46:34,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544216562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:34,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645832959] [2021-06-05 13:46:34,350 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:34,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:34,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:34,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:34,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:34,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645832959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:34,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:34,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:34,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017704395] [2021-06-05 13:46:34,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:34,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:34,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:34,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:34,568 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:34,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:34,726 INFO L93 Difference]: Finished difference Result 133 states and 262 transitions. [2021-06-05 13:46:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:34,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:34,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:34,727 INFO L225 Difference]: With dead ends: 133 [2021-06-05 13:46:34,727 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 13:46:34,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 255.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:34,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 13:46:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2021-06-05 13:46:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 103 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 211 transitions. [2021-06-05 13:46:34,728 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 211 transitions. Word has length 19 [2021-06-05 13:46:34,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:34,728 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 211 transitions. [2021-06-05 13:46:34,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:34,728 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 211 transitions. [2021-06-05 13:46:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:34,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:34,728 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:34,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:34,933 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:34,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1107287850, now seen corresponding path program 157 times [2021-06-05 13:46:34,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:34,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731412629] [2021-06-05 13:46:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:35,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:35,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731412629] [2021-06-05 13:46:35,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731412629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:35,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335544971] [2021-06-05 13:46:35,013 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:35,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:35,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335544971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:35,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:35,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:35,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079007924] [2021-06-05 13:46:35,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:35,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:35,224 INFO L87 Difference]: Start difference. First operand 104 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:35,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:35,463 INFO L93 Difference]: Finished difference Result 168 states and 326 transitions. [2021-06-05 13:46:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:35,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:35,463 INFO L225 Difference]: With dead ends: 168 [2021-06-05 13:46:35,463 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 13:46:35,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 13:46:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 107. [2021-06-05 13:46:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 222 transitions. [2021-06-05 13:46:35,465 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 222 transitions. Word has length 19 [2021-06-05 13:46:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:35,465 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 222 transitions. [2021-06-05 13:46:35,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 222 transitions. [2021-06-05 13:46:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:35,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:35,465 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:35,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:35,666 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:35,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1091827054, now seen corresponding path program 158 times [2021-06-05 13:46:35,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:35,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114455128] [2021-06-05 13:46:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:35,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:35,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114455128] [2021-06-05 13:46:35,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114455128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:35,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551953337] [2021-06-05 13:46:35,748 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:35,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:35,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:35,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:35,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:35,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551953337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:35,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:35,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:35,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71008532] [2021-06-05 13:46:35,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:35,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:35,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:35,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:35,963 INFO L87 Difference]: Start difference. First operand 107 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:36,246 INFO L93 Difference]: Finished difference Result 174 states and 337 transitions. [2021-06-05 13:46:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:36,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:36,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:36,247 INFO L225 Difference]: With dead ends: 174 [2021-06-05 13:46:36,247 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 13:46:36,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 13:46:36,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2021-06-05 13:46:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 218 transitions. [2021-06-05 13:46:36,248 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 218 transitions. Word has length 19 [2021-06-05 13:46:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:36,248 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 218 transitions. [2021-06-05 13:46:36,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 218 transitions. [2021-06-05 13:46:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:36,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:36,248 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:36,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 13:46:36,449 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:36,449 INFO L82 PathProgramCache]: Analyzing trace with hash -520372248, now seen corresponding path program 159 times [2021-06-05 13:46:36,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:36,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840853907] [2021-06-05 13:46:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:36,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:36,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840853907] [2021-06-05 13:46:36,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840853907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:36,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848366164] [2021-06-05 13:46:36,536 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:36,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:46:36,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:36,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:36,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:36,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848366164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:36,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:36,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:36,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668829241] [2021-06-05 13:46:36,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:36,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:36,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:36,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:36,748 INFO L87 Difference]: Start difference. First operand 106 states and 218 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:36,923 INFO L93 Difference]: Finished difference Result 153 states and 299 transitions. [2021-06-05 13:46:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:36,923 INFO L225 Difference]: With dead ends: 153 [2021-06-05 13:46:36,923 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 13:46:36,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 260.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 13:46:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2021-06-05 13:46:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 104 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 215 transitions. [2021-06-05 13:46:36,925 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 215 transitions. Word has length 19 [2021-06-05 13:46:36,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:36,925 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 215 transitions. [2021-06-05 13:46:36,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 215 transitions. [2021-06-05 13:46:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:36,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:36,925 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:37,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 13:46:37,126 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash 917043286, now seen corresponding path program 160 times [2021-06-05 13:46:37,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:37,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951710192] [2021-06-05 13:46:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:37,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:37,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951710192] [2021-06-05 13:46:37,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951710192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:37,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706438531] [2021-06-05 13:46:37,199 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:37,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:37,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:37,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:37,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:37,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706438531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:37,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:37,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:37,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168111212] [2021-06-05 13:46:37,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:37,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:37,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:37,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:37,370 INFO L87 Difference]: Start difference. First operand 105 states and 215 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:37,965 INFO L93 Difference]: Finished difference Result 196 states and 368 transitions. [2021-06-05 13:46:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:46:37,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:37,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:37,965 INFO L225 Difference]: With dead ends: 196 [2021-06-05 13:46:37,965 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 13:46:37,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 559.6ms TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:46:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 13:46:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-06-05 13:46:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.086206896551724) internal successors, (242), 116 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 242 transitions. [2021-06-05 13:46:37,967 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 242 transitions. Word has length 19 [2021-06-05 13:46:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:37,967 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 242 transitions. [2021-06-05 13:46:37,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 242 transitions. [2021-06-05 13:46:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:37,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:37,967 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:38,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 13:46:38,179 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash 534322898, now seen corresponding path program 161 times [2021-06-05 13:46:38,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:38,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256638800] [2021-06-05 13:46:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:38,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:38,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256638800] [2021-06-05 13:46:38,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256638800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:38,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94330757] [2021-06-05 13:46:38,253 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:38,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:38,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:38,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:38,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:38,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94330757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:38,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:38,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:38,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663832386] [2021-06-05 13:46:38,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:38,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:38,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:38,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:38,568 INFO L87 Difference]: Start difference. First operand 117 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:39,002 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-06-05 13:46:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:46:39,003 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:39,003 INFO L225 Difference]: With dead ends: 156 [2021-06-05 13:46:39,003 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 13:46:39,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 13:46:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2021-06-05 13:46:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 13:46:39,005 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-06-05 13:46:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:39,005 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 13:46:39,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 13:46:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:39,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:39,005 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:39,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 13:46:39,205 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:39,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:39,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1681350570, now seen corresponding path program 162 times [2021-06-05 13:46:39,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:39,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587934439] [2021-06-05 13:46:39,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:39,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:39,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587934439] [2021-06-05 13:46:39,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587934439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:39,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405393566] [2021-06-05 13:46:39,291 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:39,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:39,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:39,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:39,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405393566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:39,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:39,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:39,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433890867] [2021-06-05 13:46:39,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:39,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:39,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:39,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:39,483 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:40,081 INFO L93 Difference]: Finished difference Result 206 states and 402 transitions. [2021-06-05 13:46:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:46:40,081 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:40,082 INFO L225 Difference]: With dead ends: 206 [2021-06-05 13:46:40,082 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 13:46:40,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 549.1ms TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:46:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 13:46:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 114. [2021-06-05 13:46:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:40,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-06-05 13:46:40,083 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 19 [2021-06-05 13:46:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:40,084 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-06-05 13:46:40,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:40,084 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-06-05 13:46:40,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:40,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:40,084 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:40,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 13:46:40,284 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:40,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:40,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1665889774, now seen corresponding path program 163 times [2021-06-05 13:46:40,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:40,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293989666] [2021-06-05 13:46:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:40,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:40,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293989666] [2021-06-05 13:46:40,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293989666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:40,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942418870] [2021-06-05 13:46:40,363 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:40,383 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:40,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:40,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942418870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:40,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:40,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:40,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628941788] [2021-06-05 13:46:40,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:40,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:40,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:40,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:40,842 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:41,471 INFO L93 Difference]: Finished difference Result 197 states and 390 transitions. [2021-06-05 13:46:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:46:41,471 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:41,472 INFO L225 Difference]: With dead ends: 197 [2021-06-05 13:46:41,472 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 13:46:41,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 572.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:46:41,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 13:46:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 112. [2021-06-05 13:46:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-06-05 13:46:41,473 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-06-05 13:46:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:41,473 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-06-05 13:46:41,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-06-05 13:46:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:41,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:41,474 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:41,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:41,674 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:41,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1058227826, now seen corresponding path program 164 times [2021-06-05 13:46:41,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:41,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620843525] [2021-06-05 13:46:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:41,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:41,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620843525] [2021-06-05 13:46:41,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620843525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:41,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896320509] [2021-06-05 13:46:41,749 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:41,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:41,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:41,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:41,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:41,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896320509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:41,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:41,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:41,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763039421] [2021-06-05 13:46:41,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:41,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:41,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:41,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:41,949 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:42,178 INFO L93 Difference]: Finished difference Result 158 states and 311 transitions. [2021-06-05 13:46:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:42,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:42,179 INFO L225 Difference]: With dead ends: 158 [2021-06-05 13:46:42,179 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 13:46:42,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:42,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 13:46:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 109. [2021-06-05 13:46:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-05 13:46:42,180 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-05 13:46:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:42,180 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-05 13:46:42,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-05 13:46:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:42,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:42,181 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:42,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:42,381 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:42,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:42,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1703746494, now seen corresponding path program 165 times [2021-06-05 13:46:42,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:42,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592320727] [2021-06-05 13:46:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:42,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:42,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592320727] [2021-06-05 13:46:42,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592320727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:42,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521623269] [2021-06-05 13:46:42,458 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:42,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:46:42,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:42,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:42,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521623269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:42,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:42,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:42,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212095049] [2021-06-05 13:46:42,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:42,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:42,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:42,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:42,674 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:42,852 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-06-05 13:46:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:42,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:42,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:42,853 INFO L225 Difference]: With dead ends: 128 [2021-06-05 13:46:42,853 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 13:46:42,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:42,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 13:46:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-06-05 13:46:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-05 13:46:42,854 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-06-05 13:46:42,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:42,854 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-05 13:46:42,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:42,854 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-05 13:46:42,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:42,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:42,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:43,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:43,057 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash 375547334, now seen corresponding path program 166 times [2021-06-05 13:46:43,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:43,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482694635] [2021-06-05 13:46:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:43,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:43,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482694635] [2021-06-05 13:46:43,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482694635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:43,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202845534] [2021-06-05 13:46:43,137 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:43,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:43,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:43,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:43,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202845534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:43,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:43,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:43,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141394115] [2021-06-05 13:46:43,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:43,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:43,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:43,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:43,352 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:43,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:43,541 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-06-05 13:46:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:43,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:43,541 INFO L225 Difference]: With dead ends: 151 [2021-06-05 13:46:43,541 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 13:46:43,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 13:46:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-06-05 13:46:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 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) [2021-06-05 13:46:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-06-05 13:46:43,543 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-06-05 13:46:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:43,543 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-06-05 13:46:43,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-06-05 13:46:43,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:43,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:43,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:43,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:43,743 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:43,744 INFO L82 PathProgramCache]: Analyzing trace with hash 391008130, now seen corresponding path program 167 times [2021-06-05 13:46:43,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:43,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727281014] [2021-06-05 13:46:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:43,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:43,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727281014] [2021-06-05 13:46:43,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727281014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:43,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768617875] [2021-06-05 13:46:43,840 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:43,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:46:43,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:43,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:43,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:44,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768617875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:44,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:44,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:44,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245115872] [2021-06-05 13:46:44,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:44,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:44,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:44,048 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:44,254 INFO L93 Difference]: Finished difference Result 138 states and 279 transitions. [2021-06-05 13:46:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:44,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:44,255 INFO L225 Difference]: With dead ends: 138 [2021-06-05 13:46:44,255 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 13:46:44,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:44,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 13:46:44,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-06-05 13:46:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 13:46:44,256 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 19 [2021-06-05 13:46:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:44,256 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 13:46:44,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 13:46:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:44,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:44,256 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:44,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:44,457 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1773249202, now seen corresponding path program 168 times [2021-06-05 13:46:44,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:44,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287182097] [2021-06-05 13:46:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:44,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:44,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287182097] [2021-06-05 13:46:44,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287182097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:44,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710464730] [2021-06-05 13:46:44,537 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:44,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:46:44,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:44,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:44,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:44,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710464730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:44,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:44,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:44,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633731952] [2021-06-05 13:46:44,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:44,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:44,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:44,749 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:45,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:45,016 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-06-05 13:46:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:46:45,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:45,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:45,017 INFO L225 Difference]: With dead ends: 152 [2021-06-05 13:46:45,017 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 13:46:45,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:45,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 13:46:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-06-05 13:46:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 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) [2021-06-05 13:46:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-06-05 13:46:45,018 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-06-05 13:46:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:45,018 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-06-05 13:46:45,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-06-05 13:46:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:45,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:45,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:45,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:45,219 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:45,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1757788406, now seen corresponding path program 169 times [2021-06-05 13:46:45,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:45,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335813424] [2021-06-05 13:46:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:45,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:45,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335813424] [2021-06-05 13:46:45,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335813424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:45,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933909296] [2021-06-05 13:46:45,299 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:45,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933909296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:45,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:45,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:45,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110035084] [2021-06-05 13:46:45,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:45,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:45,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:45,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:45,505 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:45,780 INFO L93 Difference]: Finished difference Result 158 states and 312 transitions. [2021-06-05 13:46:45,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:46:45,780 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:45,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:45,780 INFO L225 Difference]: With dead ends: 158 [2021-06-05 13:46:45,780 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 13:46:45,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:46:45,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 13:46:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2021-06-05 13:46:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-05 13:46:45,782 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-06-05 13:46:45,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:45,782 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-05 13:46:45,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:45,782 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-05 13:46:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:45,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:45,782 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:45,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 13:46:45,983 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:45,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:45,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1186333600, now seen corresponding path program 170 times [2021-06-05 13:46:45,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:45,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446983789] [2021-06-05 13:46:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:46,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:46,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446983789] [2021-06-05 13:46:46,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446983789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:46,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820958760] [2021-06-05 13:46:46,058 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:46,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:46,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:46,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:46,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:46,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820958760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:46,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:46,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:46,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539143196] [2021-06-05 13:46:46,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:46,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:46,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:46,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:46,275 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:46,442 INFO L93 Difference]: Finished difference Result 132 states and 265 transitions. [2021-06-05 13:46:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:46,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:46,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:46,443 INFO L225 Difference]: With dead ends: 132 [2021-06-05 13:46:46,443 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 13:46:46,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 13:46:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-06-05 13:46:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-06-05 13:46:46,444 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 19 [2021-06-05 13:46:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:46,444 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-06-05 13:46:46,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-06-05 13:46:46,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:46,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:46,444 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:46,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 13:46:46,645 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1427626506, now seen corresponding path program 171 times [2021-06-05 13:46:46,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:46,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120441960] [2021-06-05 13:46:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:46,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:46,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120441960] [2021-06-05 13:46:46,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120441960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:46,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353430361] [2021-06-05 13:46:46,729 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:46,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:46:46,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:46,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:46,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:46,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353430361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:46,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:46,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:46,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434888762] [2021-06-05 13:46:46,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:46,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:46,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:46,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:46,947 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:47,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:47,263 INFO L93 Difference]: Finished difference Result 173 states and 341 transitions. [2021-06-05 13:46:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:46:47,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:47,264 INFO L225 Difference]: With dead ends: 173 [2021-06-05 13:46:47,264 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 13:46:47,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:47,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 13:46:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2021-06-05 13:46:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-05 13:46:47,265 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-06-05 13:46:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:47,265 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-05 13:46:47,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-05 13:46:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:47,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:47,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:47,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 13:46:47,466 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:47,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1443087302, now seen corresponding path program 172 times [2021-06-05 13:46:47,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:47,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364611121] [2021-06-05 13:46:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:47,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:47,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364611121] [2021-06-05 13:46:47,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364611121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:47,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608118955] [2021-06-05 13:46:47,546 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:47,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:47,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:47,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:47,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608118955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:47,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:47,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:47,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401906456] [2021-06-05 13:46:47,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:47,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:47,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:47,751 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:48,053 INFO L93 Difference]: Finished difference Result 179 states and 352 transitions. [2021-06-05 13:46:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:46:48,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:48,054 INFO L225 Difference]: With dead ends: 179 [2021-06-05 13:46:48,054 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 13:46:48,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:46:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 13:46:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 112. [2021-06-05 13:46:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-05 13:46:48,055 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-05 13:46:48,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:48,055 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-05 13:46:48,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:48,055 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-05 13:46:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:48,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:48,056 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:48,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:48,256 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:48,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2014542108, now seen corresponding path program 173 times [2021-06-05 13:46:48,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:48,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292703480] [2021-06-05 13:46:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:48,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:48,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292703480] [2021-06-05 13:46:48,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292703480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:48,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79401157] [2021-06-05 13:46:48,335 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:48,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:48,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:48,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:48,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79401157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:48,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:48,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:48,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019923103] [2021-06-05 13:46:48,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:48,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:48,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:48,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:48,581 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:48,828 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-06-05 13:46:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:48,829 INFO L225 Difference]: With dead ends: 156 [2021-06-05 13:46:48,829 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 13:46:48,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 13:46:48,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2021-06-05 13:46:48,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:48,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-05 13:46:48,830 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-05 13:46:48,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:48,831 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-05 13:46:48,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:48,831 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-05 13:46:48,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:48,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:48,831 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:49,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:49,031 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:49,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1476686530, now seen corresponding path program 174 times [2021-06-05 13:46:49,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:49,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131712757] [2021-06-05 13:46:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:49,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:49,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131712757] [2021-06-05 13:46:49,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131712757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:49,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444553551] [2021-06-05 13:46:49,108 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:49,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:49,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:49,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:49,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444553551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:49,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:49,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:49,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135390754] [2021-06-05 13:46:49,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:49,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:49,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:49,331 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:49,514 INFO L93 Difference]: Finished difference Result 150 states and 298 transitions. [2021-06-05 13:46:49,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:49,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:49,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:49,514 INFO L225 Difference]: With dead ends: 150 [2021-06-05 13:46:49,514 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 13:46:49,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 13:46:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-06-05 13:46:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 13:46:49,516 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-05 13:46:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:49,516 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 13:46:49,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 13:46:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:49,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:49,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:49,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 13:46:49,717 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:49,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1981542510, now seen corresponding path program 175 times [2021-06-05 13:46:49,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:49,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965355173] [2021-06-05 13:46:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:49,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:49,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965355173] [2021-06-05 13:46:49,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965355173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:49,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073659238] [2021-06-05 13:46:49,805 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:49,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:49,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:50,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073659238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:50,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:50,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:50,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718453405] [2021-06-05 13:46:50,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:50,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:50,017 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:50,315 INFO L93 Difference]: Finished difference Result 173 states and 338 transitions. [2021-06-05 13:46:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:46:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:50,316 INFO L225 Difference]: With dead ends: 173 [2021-06-05 13:46:50,316 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 13:46:50,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 13:46:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 111. [2021-06-05 13:46:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-06-05 13:46:50,317 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 19 [2021-06-05 13:46:50,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:50,317 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-06-05 13:46:50,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-06-05 13:46:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:50,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:50,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:50,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:50,518 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:50,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1966081714, now seen corresponding path program 176 times [2021-06-05 13:46:50,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:50,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377131530] [2021-06-05 13:46:50,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:50,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377131530] [2021-06-05 13:46:50,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377131530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333929068] [2021-06-05 13:46:50,600 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:50,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:50,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:50,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:50,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:50,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333929068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:50,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:50,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:50,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742078761] [2021-06-05 13:46:50,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:50,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:50,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:50,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:50,804 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:51,071 INFO L93 Difference]: Finished difference Result 179 states and 349 transitions. [2021-06-05 13:46:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:46:51,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:51,072 INFO L225 Difference]: With dead ends: 179 [2021-06-05 13:46:51,072 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 13:46:51,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 13:46:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-06-05 13:46:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 109 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 229 transitions. [2021-06-05 13:46:51,073 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 229 transitions. Word has length 19 [2021-06-05 13:46:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:51,073 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 229 transitions. [2021-06-05 13:46:51,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 229 transitions. [2021-06-05 13:46:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:51,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:51,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:51,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:51,274 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1394626908, now seen corresponding path program 177 times [2021-06-05 13:46:51,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:51,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618980585] [2021-06-05 13:46:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:51,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:51,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618980585] [2021-06-05 13:46:51,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618980585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:51,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009650654] [2021-06-05 13:46:51,351 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:51,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:46:51,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:51,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:51,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:51,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009650654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:51,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:51,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:51,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372174522] [2021-06-05 13:46:51,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:51,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:51,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:51,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:51,561 INFO L87 Difference]: Start difference. First operand 110 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:51,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:51,787 INFO L93 Difference]: Finished difference Result 152 states and 300 transitions. [2021-06-05 13:46:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:51,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:51,788 INFO L225 Difference]: With dead ends: 152 [2021-06-05 13:46:51,788 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 13:46:51,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 13:46:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 109. [2021-06-05 13:46:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-06-05 13:46:51,789 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 19 [2021-06-05 13:46:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:51,789 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-06-05 13:46:51,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-06-05 13:46:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:51,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:51,790 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:52,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:52,005 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:52,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:52,005 INFO L82 PathProgramCache]: Analyzing trace with hash 42788626, now seen corresponding path program 178 times [2021-06-05 13:46:52,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:52,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488390135] [2021-06-05 13:46:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:52,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:52,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488390135] [2021-06-05 13:46:52,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488390135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:52,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175973230] [2021-06-05 13:46:52,088 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:52,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:52,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:52,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:52,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:52,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175973230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:52,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:52,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:52,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718222458] [2021-06-05 13:46:52,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:52,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:52,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:52,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:52,297 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:52,597 INFO L93 Difference]: Finished difference Result 175 states and 335 transitions. [2021-06-05 13:46:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:52,597 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:52,597 INFO L225 Difference]: With dead ends: 175 [2021-06-05 13:46:52,597 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 13:46:52,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:46:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 13:46:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-06-05 13:46:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 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) [2021-06-05 13:46:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-06-05 13:46:52,599 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-06-05 13:46:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:52,599 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-06-05 13:46:52,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-06-05 13:46:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:52,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:52,599 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:52,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:52,800 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:52,800 INFO L82 PathProgramCache]: Analyzing trace with hash -339931762, now seen corresponding path program 179 times [2021-06-05 13:46:52,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:52,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050933009] [2021-06-05 13:46:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:52,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:52,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050933009] [2021-06-05 13:46:52,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050933009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:52,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629126380] [2021-06-05 13:46:52,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:52,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:52,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:52,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:52,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:53,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629126380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:53,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:53,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:53,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082288962] [2021-06-05 13:46:53,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:53,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:53,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:53,066 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:53,366 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-06-05 13:46:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:53,366 INFO L225 Difference]: With dead ends: 163 [2021-06-05 13:46:53,366 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 13:46:53,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:46:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 13:46:53,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2021-06-05 13:46:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.128205128205128) internal successors, (249), 117 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 249 transitions. [2021-06-05 13:46:53,368 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 249 transitions. Word has length 19 [2021-06-05 13:46:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:53,368 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 249 transitions. [2021-06-05 13:46:53,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:53,368 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 249 transitions. [2021-06-05 13:46:53,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:53,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:53,368 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:53,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:53,569 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:53,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1739362066, now seen corresponding path program 180 times [2021-06-05 13:46:53,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:53,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703942540] [2021-06-05 13:46:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:53,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:53,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703942540] [2021-06-05 13:46:53,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703942540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:53,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928069312] [2021-06-05 13:46:53,651 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:53,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:53,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:53,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:53,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928069312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:53,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:53,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:53,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708484034] [2021-06-05 13:46:53,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:53,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:53,836 INFO L87 Difference]: Start difference. First operand 118 states and 249 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:54,256 INFO L93 Difference]: Finished difference Result 208 states and 411 transitions. [2021-06-05 13:46:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:46:54,256 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:54,257 INFO L225 Difference]: With dead ends: 208 [2021-06-05 13:46:54,257 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 13:46:54,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 13:46:54,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 119. [2021-06-05 13:46:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1440677966101696) internal successors, (253), 118 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 253 transitions. [2021-06-05 13:46:54,258 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 253 transitions. Word has length 19 [2021-06-05 13:46:54,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:54,258 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 253 transitions. [2021-06-05 13:46:54,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:54,258 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 253 transitions. [2021-06-05 13:46:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:54,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:54,259 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:54,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:54,474 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1754822862, now seen corresponding path program 181 times [2021-06-05 13:46:54,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:54,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424288951] [2021-06-05 13:46:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:54,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:54,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424288951] [2021-06-05 13:46:54,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424288951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:54,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105706138] [2021-06-05 13:46:54,553 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:54,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:54,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:54,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105706138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:54,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:54,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:54,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640717074] [2021-06-05 13:46:54,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:54,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:54,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:54,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:54,911 INFO L87 Difference]: Start difference. First operand 119 states and 253 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:55,268 INFO L93 Difference]: Finished difference Result 198 states and 398 transitions. [2021-06-05 13:46:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:46:55,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:55,269 INFO L225 Difference]: With dead ends: 198 [2021-06-05 13:46:55,269 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 13:46:55,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:46:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 13:46:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 117. [2021-06-05 13:46:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 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) [2021-06-05 13:46:55,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-06-05 13:46:55,271 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-06-05 13:46:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:55,271 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-06-05 13:46:55,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-06-05 13:46:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:55,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:55,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:55,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 13:46:55,471 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:55,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1932482486, now seen corresponding path program 182 times [2021-06-05 13:46:55,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:55,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508828947] [2021-06-05 13:46:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:55,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:55,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508828947] [2021-06-05 13:46:55,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508828947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:55,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110924258] [2021-06-05 13:46:55,552 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:55,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:55,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:55,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:46:55,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:55,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110924258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:55,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:55,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:46:55,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113416476] [2021-06-05 13:46:55,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:55,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:55,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:55,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:55,777 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:55,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:55,949 INFO L93 Difference]: Finished difference Result 164 states and 327 transitions. [2021-06-05 13:46:55,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:55,949 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:55,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:55,950 INFO L225 Difference]: With dead ends: 164 [2021-06-05 13:46:55,950 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 13:46:55,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 13:46:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2021-06-05 13:46:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1043478260869564) internal successors, (242), 115 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 242 transitions. [2021-06-05 13:46:55,951 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 242 transitions. Word has length 19 [2021-06-05 13:46:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:55,951 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 242 transitions. [2021-06-05 13:46:55,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 242 transitions. [2021-06-05 13:46:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:55,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:55,951 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:56,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 13:46:56,157 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:56,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:56,157 INFO L82 PathProgramCache]: Analyzing trace with hash 672760770, now seen corresponding path program 183 times [2021-06-05 13:46:56,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:56,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466062856] [2021-06-05 13:46:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:56,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:56,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466062856] [2021-06-05 13:46:56,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466062856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:56,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561300564] [2021-06-05 13:46:56,231 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:56,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:46:56,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:56,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:56,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:56,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561300564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:56,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:56,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:56,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323724226] [2021-06-05 13:46:56,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:56,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:56,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:56,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:56,423 INFO L87 Difference]: Start difference. First operand 116 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:56,661 INFO L93 Difference]: Finished difference Result 135 states and 272 transitions. [2021-06-05 13:46:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:46:56,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:56,662 INFO L225 Difference]: With dead ends: 135 [2021-06-05 13:46:56,662 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 13:46:56,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 13:46:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-06-05 13:46:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-05 13:46:56,664 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-05 13:46:56,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:56,664 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-05 13:46:56,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:56,664 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-05 13:46:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:56,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:56,664 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:56,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:56,869 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:56,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1542912698, now seen corresponding path program 184 times [2021-06-05 13:46:56,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:56,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280124702] [2021-06-05 13:46:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:56,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:56,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280124702] [2021-06-05 13:46:56,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280124702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:56,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654683595] [2021-06-05 13:46:56,954 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:56,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:56,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:56,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:56,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:57,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654683595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:57,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:57,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:57,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334410107] [2021-06-05 13:46:57,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:57,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:57,152 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:57,492 INFO L93 Difference]: Finished difference Result 178 states and 353 transitions. [2021-06-05 13:46:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:46:57,493 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:57,493 INFO L225 Difference]: With dead ends: 178 [2021-06-05 13:46:57,493 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 13:46:57,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:46:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 13:46:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-06-05 13:46:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-05 13:46:57,495 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-06-05 13:46:57,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:57,495 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-05 13:46:57,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-05 13:46:57,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:57,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:57,495 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:57,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 13:46:57,696 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:57,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1527451902, now seen corresponding path program 185 times [2021-06-05 13:46:57,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:57,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15136160] [2021-06-05 13:46:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:57,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:57,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15136160] [2021-06-05 13:46:57,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15136160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:57,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392955646] [2021-06-05 13:46:57,776 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:57,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:46:57,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:57,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:57,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:57,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392955646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:57,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:57,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:57,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579295366] [2021-06-05 13:46:57,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:57,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:57,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:57,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:57,959 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:58,287 INFO L93 Difference]: Finished difference Result 170 states and 343 transitions. [2021-06-05 13:46:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:58,288 INFO L225 Difference]: With dead ends: 170 [2021-06-05 13:46:58,288 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 13:46:58,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:46:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 13:46:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2021-06-05 13:46:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-05 13:46:58,289 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-05 13:46:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:58,290 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-05 13:46:58,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-05 13:46:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:58,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:58,290 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:58,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:58,490 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:58,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:58,490 INFO L82 PathProgramCache]: Analyzing trace with hash 603258062, now seen corresponding path program 186 times [2021-06-05 13:46:58,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:58,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739033318] [2021-06-05 13:46:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:58,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:58,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739033318] [2021-06-05 13:46:58,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739033318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:58,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126456774] [2021-06-05 13:46:58,571 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:58,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:58,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:58,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:58,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:58,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126456774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:58,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:58,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:58,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417467705] [2021-06-05 13:46:58,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:58,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:58,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:58,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:58,758 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:59,050 INFO L93 Difference]: Finished difference Result 170 states and 337 transitions. [2021-06-05 13:46:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:46:59,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:46:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:59,051 INFO L225 Difference]: With dead ends: 170 [2021-06-05 13:46:59,051 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 13:46:59,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 13:46:59,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-06-05 13:46:59,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:59,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-05 13:46:59,052 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-06-05 13:46:59,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:59,052 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-05 13:46:59,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-05 13:46:59,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:46:59,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:59,053 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:59,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 13:46:59,253 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:59,253 INFO L82 PathProgramCache]: Analyzing trace with hash 618718858, now seen corresponding path program 187 times [2021-06-05 13:46:59,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:59,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054428826] [2021-06-05 13:46:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:59,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:59,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054428826] [2021-06-05 13:46:59,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054428826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:59,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028988339] [2021-06-05 13:46:59,333 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:59,353 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:46:59,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:59,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028988339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:59,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:59,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:46:59,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107565553] [2021-06-05 13:46:59,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:46:59,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:59,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:46:59,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:59,803 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:00,118 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-06-05 13:47:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:47:00,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:47:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:00,118 INFO L225 Difference]: With dead ends: 182 [2021-06-05 13:47:00,118 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 13:47:00,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:47:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 13:47:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 112. [2021-06-05 13:47:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-05 13:47:00,120 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-05 13:47:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:00,120 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-05 13:47:00,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-05 13:47:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:00,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:00,120 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:00,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:00,320 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1190173664, now seen corresponding path program 188 times [2021-06-05 13:47:00,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:00,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817272888] [2021-06-05 13:47:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:00,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:00,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817272888] [2021-06-05 13:47:00,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817272888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:00,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620919617] [2021-06-05 13:47:00,402 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:00,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:00,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:00,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:00,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620919617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:00,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:00,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:47:00,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187327373] [2021-06-05 13:47:00,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:47:00,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:00,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:47:00,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:47:00,769 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:01,074 INFO L93 Difference]: Finished difference Result 140 states and 281 transitions. [2021-06-05 13:47:01,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:47:01,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:47:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:01,075 INFO L225 Difference]: With dead ends: 140 [2021-06-05 13:47:01,075 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 13:47:01,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:47:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 13:47:01,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-05 13:47:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-05 13:47:01,076 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-05 13:47:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:01,076 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-05 13:47:01,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-05 13:47:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:01,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:01,077 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:01,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-06-05 13:47:01,277 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:01,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:01,277 INFO L82 PathProgramCache]: Analyzing trace with hash 668199066, now seen corresponding path program 189 times [2021-06-05 13:47:01,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:01,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567525526] [2021-06-05 13:47:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:01,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:01,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567525526] [2021-06-05 13:47:01,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567525526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:01,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104222870] [2021-06-05 13:47:01,372 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:47:01,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:01,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:01,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:01,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:01,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104222870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:01,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:01,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:01,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044409125] [2021-06-05 13:47:01,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:01,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:01,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:01,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:01,586 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:02,214 INFO L93 Difference]: Finished difference Result 201 states and 375 transitions. [2021-06-05 13:47:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:47:02,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:02,215 INFO L225 Difference]: With dead ends: 201 [2021-06-05 13:47:02,215 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 13:47:02,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 633.1ms TimeCoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:47:02,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 13:47:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 117. [2021-06-05 13:47:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 116 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2021-06-05 13:47:02,217 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 19 [2021-06-05 13:47:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:02,217 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2021-06-05 13:47:02,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2021-06-05 13:47:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:02,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:02,217 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:02,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:02,417 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:02,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:02,418 INFO L82 PathProgramCache]: Analyzing trace with hash 285478678, now seen corresponding path program 190 times [2021-06-05 13:47:02,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:02,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350568973] [2021-06-05 13:47:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:02,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:02,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350568973] [2021-06-05 13:47:02,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350568973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:02,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526896276] [2021-06-05 13:47:02,495 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:02,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:02,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:02,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:02,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:02,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526896276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:02,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:02,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:02,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920836720] [2021-06-05 13:47:02,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:02,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:02,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:02,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:02,707 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:03,175 INFO L93 Difference]: Finished difference Result 161 states and 321 transitions. [2021-06-05 13:47:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:47:03,175 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:03,176 INFO L225 Difference]: With dead ends: 161 [2021-06-05 13:47:03,176 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 13:47:03,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:47:03,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 13:47:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2021-06-05 13:47:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 112 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 235 transitions. [2021-06-05 13:47:03,177 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 235 transitions. Word has length 19 [2021-06-05 13:47:03,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:03,177 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 235 transitions. [2021-06-05 13:47:03,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 235 transitions. [2021-06-05 13:47:03,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:03,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:03,177 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:03,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:03,378 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:03,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1930194790, now seen corresponding path program 191 times [2021-06-05 13:47:03,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:03,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474774733] [2021-06-05 13:47:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:03,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:03,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474774733] [2021-06-05 13:47:03,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474774733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:03,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352432679] [2021-06-05 13:47:03,471 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:03,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:47:03,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:03,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:03,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:03,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352432679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:03,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:03,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:03,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38918461] [2021-06-05 13:47:03,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:03,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:03,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:03,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:03,682 INFO L87 Difference]: Start difference. First operand 113 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:04,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:04,394 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-06-05 13:47:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:47:04,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:04,395 INFO L225 Difference]: With dead ends: 220 [2021-06-05 13:47:04,395 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 13:47:04,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 608.0ms TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:47:04,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 13:47:04,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 114. [2021-06-05 13:47:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 113 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 239 transitions. [2021-06-05 13:47:04,396 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 239 transitions. Word has length 19 [2021-06-05 13:47:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:04,396 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 239 transitions. [2021-06-05 13:47:04,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:04,396 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 239 transitions. [2021-06-05 13:47:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:04,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:04,397 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:04,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 13:47:04,597 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:04,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:04,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1914733994, now seen corresponding path program 192 times [2021-06-05 13:47:04,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:04,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399894876] [2021-06-05 13:47:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:04,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:04,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399894876] [2021-06-05 13:47:04,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399894876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:04,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75123007] [2021-06-05 13:47:04,678 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:04,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:47:04,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:04,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:04,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:04,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75123007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:04,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:04,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:04,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289765684] [2021-06-05 13:47:04,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:04,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:04,874 INFO L87 Difference]: Start difference. First operand 114 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:05,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:05,510 INFO L93 Difference]: Finished difference Result 210 states and 423 transitions. [2021-06-05 13:47:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:47:05,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:05,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:05,511 INFO L225 Difference]: With dead ends: 210 [2021-06-05 13:47:05,511 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 13:47:05,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:47:05,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 13:47:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 109. [2021-06-05 13:47:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-06-05 13:47:05,512 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-06-05 13:47:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:05,512 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-06-05 13:47:05,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-06-05 13:47:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:05,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:05,513 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:05,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 13:47:05,713 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:05,713 INFO L82 PathProgramCache]: Analyzing trace with hash -206055594, now seen corresponding path program 193 times [2021-06-05 13:47:05,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:05,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015819119] [2021-06-05 13:47:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:05,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:05,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015819119] [2021-06-05 13:47:05,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015819119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:05,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169760848] [2021-06-05 13:47:05,789 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:05,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:05,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:05,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169760848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:05,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:05,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:05,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260317061] [2021-06-05 13:47:05,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:05,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:05,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:05,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:05,977 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:06,257 INFO L93 Difference]: Finished difference Result 186 states and 351 transitions. [2021-06-05 13:47:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:47:06,257 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:06,258 INFO L225 Difference]: With dead ends: 186 [2021-06-05 13:47:06,258 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 13:47:06,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:47:06,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 13:47:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 117. [2021-06-05 13:47:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-06-05 13:47:06,259 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 19 [2021-06-05 13:47:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:06,259 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-06-05 13:47:06,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-06-05 13:47:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:06,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:06,259 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:06,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 13:47:06,460 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:06,460 INFO L82 PathProgramCache]: Analyzing trace with hash -588775982, now seen corresponding path program 194 times [2021-06-05 13:47:06,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:06,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930437667] [2021-06-05 13:47:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:06,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:06,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930437667] [2021-06-05 13:47:06,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930437667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:06,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80071663] [2021-06-05 13:47:06,536 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:06,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:06,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:06,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:06,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:06,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80071663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:06,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:06,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:06,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476774100] [2021-06-05 13:47:06,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:06,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:06,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:06,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:06,759 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:07,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:07,139 INFO L93 Difference]: Finished difference Result 170 states and 340 transitions. [2021-06-05 13:47:07,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:07,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:07,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:07,140 INFO L225 Difference]: With dead ends: 170 [2021-06-05 13:47:07,140 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 13:47:07,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 412.6ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:47:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 13:47:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2021-06-05 13:47:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1196581196581197) internal successors, (248), 117 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 248 transitions. [2021-06-05 13:47:07,142 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 248 transitions. Word has length 19 [2021-06-05 13:47:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:07,142 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 248 transitions. [2021-06-05 13:47:07,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 248 transitions. [2021-06-05 13:47:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:07,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:07,142 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:07,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 13:47:07,342 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:07,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:07,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1490517846, now seen corresponding path program 195 times [2021-06-05 13:47:07,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:07,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711958292] [2021-06-05 13:47:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:07,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:07,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711958292] [2021-06-05 13:47:07,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711958292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:07,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833369467] [2021-06-05 13:47:07,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:07,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:07,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:07,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:07,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:07,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833369467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:07,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:07,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:07,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993097525] [2021-06-05 13:47:07,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:07,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:07,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:07,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:07,610 INFO L87 Difference]: Start difference. First operand 118 states and 248 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:08,095 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-06-05 13:47:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:47:08,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:08,096 INFO L225 Difference]: With dead ends: 217 [2021-06-05 13:47:08,096 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 13:47:08,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 462.3ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:47:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 13:47:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 119. [2021-06-05 13:47:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.135593220338983) internal successors, (252), 118 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-06-05 13:47:08,098 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 19 [2021-06-05 13:47:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:08,098 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-06-05 13:47:08,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-06-05 13:47:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:08,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:08,098 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:08,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 13:47:08,313 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1505978642, now seen corresponding path program 196 times [2021-06-05 13:47:08,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:08,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349864605] [2021-06-05 13:47:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:08,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:08,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349864605] [2021-06-05 13:47:08,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349864605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:08,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92327632] [2021-06-05 13:47:08,394 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:08,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:08,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:08,414 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:08,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:08,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92327632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:08,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:08,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:08,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569266824] [2021-06-05 13:47:08,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:08,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:08,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:08,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:08,591 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:09,026 INFO L93 Difference]: Finished difference Result 206 states and 418 transitions. [2021-06-05 13:47:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:47:09,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:09,027 INFO L225 Difference]: With dead ends: 206 [2021-06-05 13:47:09,027 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 13:47:09,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:47:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 13:47:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 116. [2021-06-05 13:47:09,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-06-05 13:47:09,028 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 19 [2021-06-05 13:47:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:09,028 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-06-05 13:47:09,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:09,029 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-06-05 13:47:09,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:09,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:09,029 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:09,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:09,244 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:09,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:09,244 INFO L82 PathProgramCache]: Analyzing trace with hash 423916550, now seen corresponding path program 197 times [2021-06-05 13:47:09,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:09,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691694688] [2021-06-05 13:47:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:09,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:09,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691694688] [2021-06-05 13:47:09,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691694688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:09,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745299683] [2021-06-05 13:47:09,319 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:09,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:47:09,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:09,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:09,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:09,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745299683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:09,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:09,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:09,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257530458] [2021-06-05 13:47:09,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:09,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:09,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:09,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:09,557 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:09,839 INFO L93 Difference]: Finished difference Result 145 states and 290 transitions. [2021-06-05 13:47:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:47:09,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:09,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:09,840 INFO L225 Difference]: With dead ends: 145 [2021-06-05 13:47:09,840 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 13:47:09,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:47:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 13:47:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-06-05 13:47:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:09,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-06-05 13:47:09,841 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-06-05 13:47:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:09,841 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-06-05 13:47:09,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-06-05 13:47:09,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:09,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:09,842 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:10,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 13:47:10,042 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1791756918, now seen corresponding path program 198 times [2021-06-05 13:47:10,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:10,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475421524] [2021-06-05 13:47:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:10,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:10,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475421524] [2021-06-05 13:47:10,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475421524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:10,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869879445] [2021-06-05 13:47:10,122 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:10,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:47:10,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:10,142 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:10,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:10,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869879445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:10,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:10,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:10,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110597263] [2021-06-05 13:47:10,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:10,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:10,323 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:10,720 INFO L93 Difference]: Finished difference Result 190 states and 377 transitions. [2021-06-05 13:47:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:47:10,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:10,721 INFO L225 Difference]: With dead ends: 190 [2021-06-05 13:47:10,721 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 13:47:10,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:47:10,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 13:47:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 113. [2021-06-05 13:47:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-06-05 13:47:10,722 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-06-05 13:47:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:10,723 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-06-05 13:47:10,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-06-05 13:47:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:10,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:10,723 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:10,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 13:47:10,923 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:10,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:10,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1776296122, now seen corresponding path program 199 times [2021-06-05 13:47:10,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:10,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234748595] [2021-06-05 13:47:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:11,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234748595] [2021-06-05 13:47:11,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234748595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390291901] [2021-06-05 13:47:11,003 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:11,023 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:11,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:11,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390291901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:11,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:11,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:11,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337381940] [2021-06-05 13:47:11,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:11,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:11,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:11,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:11,317 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:11,692 INFO L93 Difference]: Finished difference Result 181 states and 367 transitions. [2021-06-05 13:47:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:11,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:11,693 INFO L225 Difference]: With dead ends: 181 [2021-06-05 13:47:11,693 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 13:47:11,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 403.9ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:47:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 13:47:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 111. [2021-06-05 13:47:11,694 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) [2021-06-05 13:47:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-05 13:47:11,694 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-06-05 13:47:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:11,694 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-05 13:47:11,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-05 13:47:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:11,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:11,694 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:11,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:11,895 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:11,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:11,895 INFO L82 PathProgramCache]: Analyzing trace with hash 354413842, now seen corresponding path program 200 times [2021-06-05 13:47:11,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:11,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102117084] [2021-06-05 13:47:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:11,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:11,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102117084] [2021-06-05 13:47:11,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102117084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:11,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398268825] [2021-06-05 13:47:11,975 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:11,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:11,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:11,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:11,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:12,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398268825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:12,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:12,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:12,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842007654] [2021-06-05 13:47:12,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:12,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:12,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:12,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:12,173 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:12,506 INFO L93 Difference]: Finished difference Result 186 states and 370 transitions. [2021-06-05 13:47:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:47:12,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:12,507 INFO L225 Difference]: With dead ends: 186 [2021-06-05 13:47:12,507 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 13:47:12,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:47:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 13:47:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-06-05 13:47:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-06-05 13:47:12,508 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-06-05 13:47:12,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:12,508 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-06-05 13:47:12,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:12,508 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-06-05 13:47:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:12,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:12,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:12,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 13:47:12,721 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:12,721 INFO L82 PathProgramCache]: Analyzing trace with hash 369874638, now seen corresponding path program 201 times [2021-06-05 13:47:12,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:12,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237294820] [2021-06-05 13:47:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:12,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:12,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237294820] [2021-06-05 13:47:12,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237294820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:12,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456189262] [2021-06-05 13:47:12,802 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:12,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:12,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:12,821 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:12,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:12,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456189262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:12,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:12,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:12,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986077925] [2021-06-05 13:47:12,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:12,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:12,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:12,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:12,996 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:13,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:13,311 INFO L93 Difference]: Finished difference Result 199 states and 393 transitions. [2021-06-05 13:47:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:47:13,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:13,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:13,311 INFO L225 Difference]: With dead ends: 199 [2021-06-05 13:47:13,312 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 13:47:13,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:47:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 13:47:13,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 112. [2021-06-05 13:47:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-06-05 13:47:13,313 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-06-05 13:47:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:13,313 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-06-05 13:47:13,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-06-05 13:47:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:13,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:13,313 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:13,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 13:47:13,525 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:13,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:13,525 INFO L82 PathProgramCache]: Analyzing trace with hash 941329444, now seen corresponding path program 202 times [2021-06-05 13:47:13,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:13,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672221280] [2021-06-05 13:47:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:13,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:13,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672221280] [2021-06-05 13:47:13,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672221280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:13,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524195596] [2021-06-05 13:47:13,601 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:13,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:13,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:13,621 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:13,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524195596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:13,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:13,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:13,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920127949] [2021-06-05 13:47:13,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:13,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:13,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:13,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:13,915 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:14,225 INFO L93 Difference]: Finished difference Result 152 states and 303 transitions. [2021-06-05 13:47:14,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:47:14,226 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:14,226 INFO L225 Difference]: With dead ends: 152 [2021-06-05 13:47:14,226 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 13:47:14,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:47:14,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 13:47:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2021-06-05 13:47:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 13:47:14,227 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-06-05 13:47:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:14,227 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 13:47:14,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 13:47:14,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:14,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:14,228 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:14,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:14,428 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:14,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1487538330, now seen corresponding path program 203 times [2021-06-05 13:47:14,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:14,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774510466] [2021-06-05 13:47:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:14,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:14,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774510466] [2021-06-05 13:47:14,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774510466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:14,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658262055] [2021-06-05 13:47:14,516 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:14,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:47:14,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:14,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:14,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658262055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:14,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:14,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:14,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838672096] [2021-06-05 13:47:14,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:14,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:14,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:14,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:14,727 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:15,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:15,074 INFO L93 Difference]: Finished difference Result 185 states and 345 transitions. [2021-06-05 13:47:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:15,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:15,075 INFO L225 Difference]: With dead ends: 185 [2021-06-05 13:47:15,075 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 13:47:15,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:47:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 13:47:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-06-05 13:47:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 13:47:15,076 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-06-05 13:47:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:15,076 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 13:47:15,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 13:47:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:15,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:15,077 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:15,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 13:47:15,277 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1104817942, now seen corresponding path program 204 times [2021-06-05 13:47:15,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:15,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407176582] [2021-06-05 13:47:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:15,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:15,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407176582] [2021-06-05 13:47:15,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407176582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:15,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770263184] [2021-06-05 13:47:15,352 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:15,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:47:15,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:15,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:15,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:15,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770263184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:15,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:15,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:15,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002650076] [2021-06-05 13:47:15,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:15,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:15,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:15,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:15,555 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:15,933 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-06-05 13:47:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:47:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:15,933 INFO L225 Difference]: With dead ends: 170 [2021-06-05 13:47:15,933 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 13:47:15,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 399.0ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:47:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 13:47:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2021-06-05 13:47:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 113 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 237 transitions. [2021-06-05 13:47:15,935 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 237 transitions. Word has length 19 [2021-06-05 13:47:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:15,935 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 237 transitions. [2021-06-05 13:47:15,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 237 transitions. [2021-06-05 13:47:15,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:15,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:15,935 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:16,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:16,136 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:16,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1110855526, now seen corresponding path program 205 times [2021-06-05 13:47:16,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:16,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870374258] [2021-06-05 13:47:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:16,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:16,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870374258] [2021-06-05 13:47:16,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870374258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:16,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402743810] [2021-06-05 13:47:16,216 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:16,235 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:16,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402743810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:16,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:16,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:16,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407223944] [2021-06-05 13:47:16,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:16,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:16,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:16,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:16,477 INFO L87 Difference]: Start difference. First operand 114 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:17,079 INFO L93 Difference]: Finished difference Result 217 states and 427 transitions. [2021-06-05 13:47:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:47:17,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:17,079 INFO L225 Difference]: With dead ends: 217 [2021-06-05 13:47:17,079 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 13:47:17,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 520.9ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:47:17,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 13:47:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 115. [2021-06-05 13:47:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 114 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 241 transitions. [2021-06-05 13:47:17,081 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 241 transitions. Word has length 19 [2021-06-05 13:47:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:17,081 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 241 transitions. [2021-06-05 13:47:17,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 241 transitions. [2021-06-05 13:47:17,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:17,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:17,081 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:17,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 13:47:17,282 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:17,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1095394730, now seen corresponding path program 206 times [2021-06-05 13:47:17,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:17,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816008555] [2021-06-05 13:47:17,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:17,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:17,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816008555] [2021-06-05 13:47:17,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816008555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:17,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219970201] [2021-06-05 13:47:17,361 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:17,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:17,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:17,380 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:17,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:17,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219970201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:17,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:17,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:17,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573893409] [2021-06-05 13:47:17,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:17,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:17,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:17,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:17,551 INFO L87 Difference]: Start difference. First operand 115 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:18,017 INFO L93 Difference]: Finished difference Result 206 states and 414 transitions. [2021-06-05 13:47:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:47:18,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:18,018 INFO L225 Difference]: With dead ends: 206 [2021-06-05 13:47:18,018 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 13:47:18,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:47:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 13:47:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 112. [2021-06-05 13:47:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 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) [2021-06-05 13:47:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-06-05 13:47:18,019 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-06-05 13:47:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:18,019 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-06-05 13:47:18,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-06-05 13:47:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:18,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:18,020 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:18,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:18,225 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:18,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:18,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2117510474, now seen corresponding path program 207 times [2021-06-05 13:47:18,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:18,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117055092] [2021-06-05 13:47:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:18,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:18,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117055092] [2021-06-05 13:47:18,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117055092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:18,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983891239] [2021-06-05 13:47:18,301 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:18,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:18,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:18,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:18,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:18,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983891239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:18,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:18,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:18,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063447175] [2021-06-05 13:47:18,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:18,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:18,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:18,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:18,508 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:18,829 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-06-05 13:47:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:47:18,830 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:18,830 INFO L225 Difference]: With dead ends: 150 [2021-06-05 13:47:18,830 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 13:47:18,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:47:18,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 13:47:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 114. [2021-06-05 13:47:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-05 13:47:18,831 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-05 13:47:18,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:18,831 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-05 13:47:18,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-05 13:47:18,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:18,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:18,832 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:19,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 13:47:19,032 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash -98162994, now seen corresponding path program 208 times [2021-06-05 13:47:19,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:19,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947391271] [2021-06-05 13:47:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:19,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:19,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947391271] [2021-06-05 13:47:19,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947391271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:19,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827735084] [2021-06-05 13:47:19,111 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:19,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:19,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:19,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:19,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:19,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827735084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:19,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:19,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:19,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608469851] [2021-06-05 13:47:19,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:19,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:19,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:19,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:19,314 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:19,785 INFO L93 Difference]: Finished difference Result 195 states and 384 transitions. [2021-06-05 13:47:19,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:47:19,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:19,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:19,786 INFO L225 Difference]: With dead ends: 195 [2021-06-05 13:47:19,786 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 13:47:19,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 449.4ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:47:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 13:47:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-06-05 13:47:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-05 13:47:19,787 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-05 13:47:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:19,787 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-05 13:47:19,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-05 13:47:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:19,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:19,788 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:19,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 13:47:19,988 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:19,988 INFO L82 PathProgramCache]: Analyzing trace with hash -82702198, now seen corresponding path program 209 times [2021-06-05 13:47:19,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:19,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433160960] [2021-06-05 13:47:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:20,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:20,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433160960] [2021-06-05 13:47:20,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433160960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:20,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581106564] [2021-06-05 13:47:20,072 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:20,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:47:20,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:20,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:20,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:20,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581106564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:20,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:20,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:20,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391830661] [2021-06-05 13:47:20,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:20,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:20,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:20,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:20,268 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:20,686 INFO L93 Difference]: Finished difference Result 186 states and 374 transitions. [2021-06-05 13:47:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:47:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:20,687 INFO L225 Difference]: With dead ends: 186 [2021-06-05 13:47:20,687 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 13:47:20,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 388.0ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:47:20,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 13:47:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-06-05 13:47:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 13:47:20,688 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 13:47:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:20,688 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 13:47:20,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 13:47:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:20,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:20,688 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:20,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:20,889 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2048007766, now seen corresponding path program 210 times [2021-06-05 13:47:20,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:20,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128677907] [2021-06-05 13:47:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:20,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:20,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128677907] [2021-06-05 13:47:20,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128677907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:20,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339827615] [2021-06-05 13:47:20,969 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:20,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:47:20,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:20,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:20,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:21,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339827615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:21,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:21,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:21,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112183369] [2021-06-05 13:47:21,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:21,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:21,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:21,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:21,234 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:21,654 INFO L93 Difference]: Finished difference Result 195 states and 385 transitions. [2021-06-05 13:47:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:21,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:21,655 INFO L225 Difference]: With dead ends: 195 [2021-06-05 13:47:21,655 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 13:47:21,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:47:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 13:47:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-06-05 13:47:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:21,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-05 13:47:21,656 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-05 13:47:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:21,656 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-05 13:47:21,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-05 13:47:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:21,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:21,657 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:21,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 13:47:21,857 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2063468562, now seen corresponding path program 211 times [2021-06-05 13:47:21,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:21,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487045610] [2021-06-05 13:47:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:21,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:21,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487045610] [2021-06-05 13:47:21,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487045610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:21,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645818812] [2021-06-05 13:47:21,937 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:21,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:21,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:22,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645818812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:22,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:22,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:22,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570880409] [2021-06-05 13:47:22,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:22,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:22,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:22,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:22,249 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:22,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:22,654 INFO L93 Difference]: Finished difference Result 209 states and 410 transitions. [2021-06-05 13:47:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:22,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:22,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:22,655 INFO L225 Difference]: With dead ends: 209 [2021-06-05 13:47:22,655 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 13:47:22,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:47:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 13:47:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 114. [2021-06-05 13:47:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-05 13:47:22,656 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-05 13:47:22,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:22,657 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-05 13:47:22,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-05 13:47:22,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:22,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:22,657 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:22,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:22,857 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:22,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:22,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1660043928, now seen corresponding path program 212 times [2021-06-05 13:47:22,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:22,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31832799] [2021-06-05 13:47:22,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:22,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:22,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31832799] [2021-06-05 13:47:22,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31832799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:22,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399238115] [2021-06-05 13:47:22,932 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:22,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:22,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:22,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:22,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:23,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399238115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:23,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:23,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:23,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557639552] [2021-06-05 13:47:23,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:23,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:23,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:23,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:23,245 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:23,593 INFO L93 Difference]: Finished difference Result 162 states and 320 transitions. [2021-06-05 13:47:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:23,593 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:23,593 INFO L225 Difference]: With dead ends: 162 [2021-06-05 13:47:23,593 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 13:47:23,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:47:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 13:47:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 111. [2021-06-05 13:47:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-06-05 13:47:23,595 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-06-05 13:47:23,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:23,595 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-06-05 13:47:23,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-06-05 13:47:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:23,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:23,595 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:23,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:23,797 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1291658542, now seen corresponding path program 213 times [2021-06-05 13:47:23,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:23,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581713599] [2021-06-05 13:47:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:23,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:23,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581713599] [2021-06-05 13:47:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581713599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:23,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164969510] [2021-06-05 13:47:23,877 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:23,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:23,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:23,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:24,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164969510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:24,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:24,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:24,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226061997] [2021-06-05 13:47:24,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:24,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:24,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:24,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:24,089 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:24,286 INFO L93 Difference]: Finished difference Result 127 states and 250 transitions. [2021-06-05 13:47:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:47:24,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:24,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:24,286 INFO L225 Difference]: With dead ends: 127 [2021-06-05 13:47:24,286 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 13:47:24,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:47:24,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 13:47:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2021-06-05 13:47:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 13:47:24,288 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-05 13:47:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:24,288 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 13:47:24,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 13:47:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:24,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:24,288 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:24,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 13:47:24,488 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:24,489 INFO L82 PathProgramCache]: Analyzing trace with hash 787635286, now seen corresponding path program 214 times [2021-06-05 13:47:24,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:24,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178232309] [2021-06-05 13:47:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:24,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:24,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178232309] [2021-06-05 13:47:24,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178232309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:24,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442253848] [2021-06-05 13:47:24,568 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:24,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:24,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:24,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:24,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:24,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442253848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:24,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:24,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:24,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520848475] [2021-06-05 13:47:24,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:24,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:24,779 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:25,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:25,197 INFO L93 Difference]: Finished difference Result 162 states and 315 transitions. [2021-06-05 13:47:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:47:25,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:25,197 INFO L225 Difference]: With dead ends: 162 [2021-06-05 13:47:25,197 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 13:47:25,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:47:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 13:47:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 108. [2021-06-05 13:47:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 13:47:25,199 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-06-05 13:47:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:25,199 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 13:47:25,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 13:47:25,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:25,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:25,199 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:25,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:25,400 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:25,400 INFO L82 PathProgramCache]: Analyzing trace with hash 803096082, now seen corresponding path program 215 times [2021-06-05 13:47:25,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:25,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574116646] [2021-06-05 13:47:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:25,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:25,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574116646] [2021-06-05 13:47:25,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574116646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:25,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487085355] [2021-06-05 13:47:25,484 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:25,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:47:25,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:25,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:25,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:25,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487085355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:25,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:25,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:25,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593992325] [2021-06-05 13:47:25,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:25,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:25,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:25,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:25,686 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:26,015 INFO L93 Difference]: Finished difference Result 158 states and 313 transitions. [2021-06-05 13:47:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:47:26,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:26,016 INFO L225 Difference]: With dead ends: 158 [2021-06-05 13:47:26,016 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 13:47:26,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:47:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 13:47:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-06-05 13:47:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 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) [2021-06-05 13:47:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-06-05 13:47:26,017 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-06-05 13:47:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:26,017 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-06-05 13:47:26,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-06-05 13:47:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:26,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:26,018 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:26,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 13:47:26,218 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:26,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1361161250, now seen corresponding path program 216 times [2021-06-05 13:47:26,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:26,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024239002] [2021-06-05 13:47:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:26,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:26,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024239002] [2021-06-05 13:47:26,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024239002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:26,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205858381] [2021-06-05 13:47:26,297 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:26,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:47:26,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:26,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:26,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:26,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205858381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:26,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:26,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:26,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380886213] [2021-06-05 13:47:26,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:26,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:26,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:26,497 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:26,825 INFO L93 Difference]: Finished difference Result 158 states and 309 transitions. [2021-06-05 13:47:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:47:26,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:26,826 INFO L225 Difference]: With dead ends: 158 [2021-06-05 13:47:26,826 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 13:47:26,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:47:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 13:47:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 108. [2021-06-05 13:47:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 13:47:26,827 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-06-05 13:47:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:26,827 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 13:47:26,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 13:47:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:26,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:26,828 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:27,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 13:47:27,028 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1345700454, now seen corresponding path program 217 times [2021-06-05 13:47:27,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:27,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317682176] [2021-06-05 13:47:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:27,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:27,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317682176] [2021-06-05 13:47:27,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317682176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:27,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162169224] [2021-06-05 13:47:27,111 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:27,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:27,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:27,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162169224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:27,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:27,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:27,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991997844] [2021-06-05 13:47:27,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:27,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:27,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:27,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:27,315 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:27,597 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2021-06-05 13:47:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:47:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:27,598 INFO L225 Difference]: With dead ends: 169 [2021-06-05 13:47:27,598 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 13:47:27,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 304.2ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:47:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 13:47:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2021-06-05 13:47:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 13:47:27,599 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-05 13:47:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:27,600 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 13:47:27,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 13:47:27,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:27,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:27,600 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:27,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 13:47:27,800 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:27,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:27,800 INFO L82 PathProgramCache]: Analyzing trace with hash -774245648, now seen corresponding path program 218 times [2021-06-05 13:47:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:27,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908665299] [2021-06-05 13:47:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:27,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:27,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908665299] [2021-06-05 13:47:27,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908665299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:27,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145103073] [2021-06-05 13:47:27,875 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:27,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:27,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:27,895 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:27,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:28,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145103073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:28,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:28,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:28,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221279672] [2021-06-05 13:47:28,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:28,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:28,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:28,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:28,069 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:28,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:28,315 INFO L93 Difference]: Finished difference Result 142 states and 281 transitions. [2021-06-05 13:47:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:47:28,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:28,316 INFO L225 Difference]: With dead ends: 142 [2021-06-05 13:47:28,316 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 13:47:28,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:47:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 13:47:28,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-06-05 13:47:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-06-05 13:47:28,317 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-06-05 13:47:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:28,317 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-06-05 13:47:28,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:28,317 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-06-05 13:47:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:28,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:28,317 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:28,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:28,518 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:28,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1839714458, now seen corresponding path program 219 times [2021-06-05 13:47:28,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:28,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720718148] [2021-06-05 13:47:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:28,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:28,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720718148] [2021-06-05 13:47:28,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720718148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:28,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278383201] [2021-06-05 13:47:28,611 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:28,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:28,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:28,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:28,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:28,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278383201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:28,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:28,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:28,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784213694] [2021-06-05 13:47:28,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:28,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:28,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:28,811 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:29,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:29,098 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-06-05 13:47:29,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:47:29,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:29,098 INFO L225 Difference]: With dead ends: 176 [2021-06-05 13:47:29,098 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 13:47:29,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:47:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 13:47:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 107. [2021-06-05 13:47:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 13:47:29,100 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-06-05 13:47:29,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:29,100 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 13:47:29,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:29,100 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 13:47:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:29,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:29,100 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:29,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:29,300 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:29,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1855175254, now seen corresponding path program 220 times [2021-06-05 13:47:29,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:29,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320424634] [2021-06-05 13:47:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:29,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:29,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320424634] [2021-06-05 13:47:29,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320424634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:29,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448725112] [2021-06-05 13:47:29,381 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:29,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:29,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:29,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:29,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448725112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:29,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:29,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:29,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536753604] [2021-06-05 13:47:29,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:29,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:29,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:29,575 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:29,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:29,933 INFO L93 Difference]: Finished difference Result 188 states and 367 transitions. [2021-06-05 13:47:29,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:47:29,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:29,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:29,934 INFO L225 Difference]: With dead ends: 188 [2021-06-05 13:47:29,934 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 13:47:29,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:47:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 13:47:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 106. [2021-06-05 13:47:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 217 transitions. [2021-06-05 13:47:29,935 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 217 transitions. Word has length 19 [2021-06-05 13:47:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:29,935 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 217 transitions. [2021-06-05 13:47:29,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 217 transitions. [2021-06-05 13:47:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:29,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:29,936 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:30,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 13:47:30,136 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:30,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1868337236, now seen corresponding path program 221 times [2021-06-05 13:47:30,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:30,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716409920] [2021-06-05 13:47:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:30,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:30,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716409920] [2021-06-05 13:47:30,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716409920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:30,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668596992] [2021-06-05 13:47:30,221 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:30,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:47:30,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:30,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:30,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:30,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668596992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:30,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:30,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:30,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382121771] [2021-06-05 13:47:30,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:30,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:30,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:30,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:30,421 INFO L87 Difference]: Start difference. First operand 106 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:30,770 INFO L93 Difference]: Finished difference Result 160 states and 314 transitions. [2021-06-05 13:47:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:47:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:30,770 INFO L225 Difference]: With dead ends: 160 [2021-06-05 13:47:30,770 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 13:47:30,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 367.0ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:47:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 13:47:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2021-06-05 13:47:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-06-05 13:47:30,772 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-06-05 13:47:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:30,772 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-06-05 13:47:30,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-06-05 13:47:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:30,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:30,772 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:30,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:30,973 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:30,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1265651738, now seen corresponding path program 5 times [2021-06-05 13:47:30,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:30,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013895623] [2021-06-05 13:47:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:31,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:31,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013895623] [2021-06-05 13:47:31,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013895623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:31,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511903440] [2021-06-05 13:47:31,048 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:31,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:47:31,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:31,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:47:31,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:31,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511903440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:31,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:31,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:47:31,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888881721] [2021-06-05 13:47:31,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:47:31,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:31,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:47:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:47:31,150 INFO L87 Difference]: Start difference. First operand 105 states and 214 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) [2021-06-05 13:47:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:31,346 INFO L93 Difference]: Finished difference Result 147 states and 293 transitions. [2021-06-05 13:47:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:47:31,346 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 19 [2021-06-05 13:47:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:31,347 INFO L225 Difference]: With dead ends: 147 [2021-06-05 13:47:31,347 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 13:47:31,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:47:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 13:47:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-06-05 13:47:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-05 13:47:31,348 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-05 13:47:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:31,348 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-05 13:47:31,348 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) [2021-06-05 13:47:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-05 13:47:31,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:47:31,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:31,348 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:31,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-06-05 13:47:31,549 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1888774482, now seen corresponding path program 222 times [2021-06-05 13:47:31,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:31,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409475953] [2021-06-05 13:47:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:31,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:31,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409475953] [2021-06-05 13:47:31,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409475953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:31,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815159207] [2021-06-05 13:47:31,624 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:31,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:47:31,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:31,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:47:31,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:31,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815159207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:31,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:31,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:47:31,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044931003] [2021-06-05 13:47:31,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:31,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:31,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:31,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:31,817 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:32,191 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-06-05 13:47:32,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:47:32,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 13:47:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:32,192 INFO L225 Difference]: With dead ends: 172 [2021-06-05 13:47:32,192 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 13:47:32,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:47:32,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 13:47:32,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 109. [2021-06-05 13:47:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-05 13:47:32,193 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-05 13:47:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:32,194 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-05 13:47:32,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-06-05 13:47:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-05 13:47:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:47:32,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:32,194 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:32,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:32,394 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:32,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:32,395 INFO L82 PathProgramCache]: Analyzing trace with hash -26764772, now seen corresponding path program 5 times [2021-06-05 13:47:32,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:32,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378064759] [2021-06-05 13:47:32,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:32,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:32,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378064759] [2021-06-05 13:47:32,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378064759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:32,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902541030] [2021-06-05 13:47:32,480 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:32,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:47:32,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:32,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:47:32,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:32,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902541030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:32,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:32,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:47:32,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41183390] [2021-06-05 13:47:32,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:47:32,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:32,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:47:32,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:32,600 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-06-05 13:47:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:32,865 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-06-05 13:47:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:47:32,865 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 21 [2021-06-05 13:47:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:32,867 INFO L225 Difference]: With dead ends: 146 [2021-06-05 13:47:32,867 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 13:47:32,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:47:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 13:47:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-05 13:47:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 13:47:32,868 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-06-05 13:47:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:32,868 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 13:47:32,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-06-05 13:47:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 13:47:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:47:32,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:32,869 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:33,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 13:47:33,069 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:33,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1997566364, now seen corresponding path program 223 times [2021-06-05 13:47:33,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:33,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258819075] [2021-06-05 13:47:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:33,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:33,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258819075] [2021-06-05 13:47:33,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258819075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:33,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661770983] [2021-06-05 13:47:33,166 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:33,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:47:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:34,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661770983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:34,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:34,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 13:47:34,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706204573] [2021-06-05 13:47:34,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:47:34,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:34,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:47:34,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:47:34,355 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:34,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:34,838 INFO L93 Difference]: Finished difference Result 154 states and 304 transitions. [2021-06-05 13:47:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:47:34,839 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-05 13:47:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:34,839 INFO L225 Difference]: With dead ends: 154 [2021-06-05 13:47:34,839 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 13:47:34,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:47:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 13:47:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-06-05 13:47:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 13:47:34,840 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-06-05 13:47:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:34,840 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 13:47:34,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 13:47:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:47:34,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:34,841 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:35,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 13:47:35,041 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:35,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:35,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1614845976, now seen corresponding path program 224 times [2021-06-05 13:47:35,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:35,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236085934] [2021-06-05 13:47:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:35,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:35,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236085934] [2021-06-05 13:47:35,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236085934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:35,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463480450] [2021-06-05 13:47:35,144 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:35,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:35,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:35,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:47:35,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:35,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463480450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:35,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:35,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 13:47:35,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323037663] [2021-06-05 13:47:35,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:47:35,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:35,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:47:35,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:47:35,358 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:35,765 INFO L93 Difference]: Finished difference Result 159 states and 314 transitions. [2021-06-05 13:47:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:47:35,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-05 13:47:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:35,766 INFO L225 Difference]: With dead ends: 159 [2021-06-05 13:47:35,766 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 13:47:35,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:47:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 13:47:35,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2021-06-05 13:47:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 13:47:35,767 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-06-05 13:47:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:35,767 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 13:47:35,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 13:47:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:47:35,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:35,768 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:35,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 13:47:35,968 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:35,968 INFO L82 PathProgramCache]: Analyzing trace with hash -600827492, now seen corresponding path program 225 times [2021-06-05 13:47:35,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:35,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434983062] [2021-06-05 13:47:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:36,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:36,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434983062] [2021-06-05 13:47:36,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434983062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:36,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133100809] [2021-06-05 13:47:36,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:36,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:47:36,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:36,091 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:47:36,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:36,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133100809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:36,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:36,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 13:47:36,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711173505] [2021-06-05 13:47:36,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:47:36,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:36,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:47:36,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:47:36,274 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:36,733 INFO L93 Difference]: Finished difference Result 185 states and 362 transitions. [2021-06-05 13:47:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:36,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-05 13:47:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:36,734 INFO L225 Difference]: With dead ends: 185 [2021-06-05 13:47:36,734 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 13:47:36,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 409.9ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:47:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 13:47:36,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2021-06-05 13:47:36,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-06-05 13:47:36,735 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-06-05 13:47:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:36,735 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-06-05 13:47:36,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-06-05 13:47:36,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:47:36,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:36,736 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:36,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 13:47:36,936 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:36,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:36,936 INFO L82 PathProgramCache]: Analyzing trace with hash -585366696, now seen corresponding path program 226 times [2021-06-05 13:47:36,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:36,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883813571] [2021-06-05 13:47:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:37,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:37,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883813571] [2021-06-05 13:47:37,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883813571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:37,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890569456] [2021-06-05 13:47:37,036 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:37,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:37,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:37,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:47:37,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:37,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890569456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:37,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:37,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 13:47:37,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664906563] [2021-06-05 13:47:37,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:47:37,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:37,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:47:37,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:47:37,416 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:37,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:37,970 INFO L93 Difference]: Finished difference Result 168 states and 336 transitions. [2021-06-05 13:47:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:37,971 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-05 13:47:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:37,971 INFO L225 Difference]: With dead ends: 168 [2021-06-05 13:47:37,971 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 13:47:37,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:47:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 13:47:37,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 112. [2021-06-05 13:47:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-06-05 13:47:37,973 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 21 [2021-06-05 13:47:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:37,973 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-06-05 13:47:37,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-06-05 13:47:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:47:37,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:37,973 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:38,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 13:47:38,188 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:38,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:38,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1736931496, now seen corresponding path program 227 times [2021-06-05 13:47:38,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:38,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565701011] [2021-06-05 13:47:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:38,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:38,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565701011] [2021-06-05 13:47:38,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565701011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:38,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646278119] [2021-06-05 13:47:38,290 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:38,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:47:38,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:38,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:47:38,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:39,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646278119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:39,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:39,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 13:47:39,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723194480] [2021-06-05 13:47:39,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:47:39,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:39,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:47:39,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:47:39,477 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:39,926 INFO L93 Difference]: Finished difference Result 176 states and 347 transitions. [2021-06-05 13:47:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:39,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-05 13:47:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:39,927 INFO L225 Difference]: With dead ends: 176 [2021-06-05 13:47:39,927 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 13:47:39,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:47:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 13:47:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2021-06-05 13:47:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-06-05 13:47:39,928 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-06-05 13:47:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:39,928 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-06-05 13:47:39,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:39,928 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-06-05 13:47:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:47:39,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:39,928 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:40,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:40,129 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:40,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:40,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1721470700, now seen corresponding path program 228 times [2021-06-05 13:47:40,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:40,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62328944] [2021-06-05 13:47:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:40,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:40,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62328944] [2021-06-05 13:47:40,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62328944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:40,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709337169] [2021-06-05 13:47:40,229 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:40,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:47:40,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:40,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:47:40,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:40,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709337169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:40,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:40,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 13:47:40,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225712007] [2021-06-05 13:47:40,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:47:40,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:40,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:47:40,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:47:40,447 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:40,880 INFO L93 Difference]: Finished difference Result 177 states and 348 transitions. [2021-06-05 13:47:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:47:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-05 13:47:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:40,880 INFO L225 Difference]: With dead ends: 177 [2021-06-05 13:47:40,880 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 13:47:40,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 416.5ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:47:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 13:47:40,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2021-06-05 13:47:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 13:47:40,882 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-06-05 13:47:40,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:40,882 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 13:47:40,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 13:47:40,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:47:40,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:40,882 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:41,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 13:47:41,082 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:41,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1150015894, now seen corresponding path program 229 times [2021-06-05 13:47:41,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:41,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819774618] [2021-06-05 13:47:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:41,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:41,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819774618] [2021-06-05 13:47:41,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819774618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:41,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087764839] [2021-06-05 13:47:41,176 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:41,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:47:41,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:41,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087764839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:41,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:41,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 13:47:41,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307834357] [2021-06-05 13:47:41,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:47:41,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:41,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:47:41,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:47:41,384 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:41,537 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-06-05 13:47:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:47:41,537 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-05 13:47:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:41,537 INFO L225 Difference]: With dead ends: 140 [2021-06-05 13:47:41,537 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 13:47:41,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:47:41,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 13:47:41,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-05 13:47:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 13:47:41,538 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-06-05 13:47:41,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:41,538 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 13:47:41,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 13:47:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 13:47:41,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:47:41,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:41,539 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:41,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 13:47:41,739 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:41,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1759602972, now seen corresponding path program 230 times [2021-06-05 13:47:41,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:41,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15088307] [2021-06-05 13:47:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:41,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15088307] [2021-06-05 13:47:41,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15088307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002735851] [2021-06-05 13:47:41,835 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:41,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:41,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:41,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:47:41,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown